![Development and anatomy of the nasal accessory sinuses in man; observations based on two hundred and ninety lateral nasal walls, showing the various stages and types of development of the accessory sinus Development and anatomy of the nasal accessory sinuses in man; observations based on two hundred and ninety lateral nasal walls, showing the various stages and types of development of the accessory sinus](https://c8.alamy.com/comp/2AKJ4DN/development-and-anatomy-of-the-nasal-accessory-sinuses-in-man-observations-based-on-two-hundred-and-ninety-lateral-nasal-walls-showing-the-various-stages-and-types-of-development-of-the-accessory-sinus-areas-from-the-sixtieth-day-of-fetal-life-to-advanced-maturity-fig-35specimen-from-a-child-eight-yehs-eicht-months-and-oneday-old-series-d-no-63lateral-view-of-frontal-ethmoidal-and-maxillary-sinus-areas-the-lateralportion-of-each-having-been-removed-by-sagittal-cuts-note-that-the-sinusfrontalis-developed-directly-from-the-infundibulum-ethmoidale-note-alsothe-incomplete-se-2AKJ4DN.jpg)
Development and anatomy of the nasal accessory sinuses in man; observations based on two hundred and ninety lateral nasal walls, showing the various stages and types of development of the accessory sinus
![The elasmobranch fishes. Chondrichthyes. THE ELASMOBRANCII FISHES 303 urogenital. The urogenital sinus, as in Heplnuchus, then emi)ties by means of a urogenital ])ai)illa into the cloaca. Leigli-Sharpe (1920-21) has described fully The elasmobranch fishes. Chondrichthyes. THE ELASMOBRANCII FISHES 303 urogenital. The urogenital sinus, as in Heplnuchus, then emi)ties by means of a urogenital ])ai)illa into the cloaca. Leigli-Sharpe (1920-21) has described fully](https://c8.alamy.com/comp/RD721T/the-elasmobranch-fishes-chondrichthyes-the-elasmobrancii-fishes-303-urogenital-the-urogenital-sinus-as-in-heplnuchus-then-emities-by-means-of-a-urogenital-aiilla-into-the-cloaca-leigli-sharpe-1920-21-has-described-fully-the-siilions-of-a-number-of-elasmobranclis-these-are-composed-of-longer-or-shorter-closed-sacs-which-end-posteriorly-by-siphon-tubes-in-a-type-like-acanthias-the-sac-lies-under-the-skin-ventral-to-the-base-of-the-pelvic-fin-and-its-tube-empties-into-the-proximal-part-of-the-clasper-tube-in-a-large-specimen-of-galiorhinus-this-siphon-sac-extended-almost-to-th-RD721T.jpg)
The elasmobranch fishes. Chondrichthyes. THE ELASMOBRANCII FISHES 303 urogenital. The urogenital sinus, as in Heplnuchus, then emi)ties by means of a urogenital ])ai)illa into the cloaca. Leigli-Sharpe (1920-21) has described fully
![Development and anatomy of the nasal accessory sinuses in man; observations based on two hundred and ninety lateral nasal walls, showing the various stages and types of development of the accessory sinus Development and anatomy of the nasal accessory sinuses in man; observations based on two hundred and ninety lateral nasal walls, showing the various stages and types of development of the accessory sinus](https://c8.alamy.com/zooms/6/b9f513068f51464fac0739bd5efc4b09/2akjc2k.jpg)
Development and anatomy of the nasal accessory sinuses in man; observations based on two hundred and ninety lateral nasal walls, showing the various stages and types of development of the accessory sinus
![Sisters of the Sinuses: Cetacean Air Sacs - Reidenberg - 2008 - The Anatomical Record - Wiley Online Library Sisters of the Sinuses: Cetacean Air Sacs - Reidenberg - 2008 - The Anatomical Record - Wiley Online Library](https://anatomypubs.onlinelibrary.wiley.com/cms/asset/5642ea21-afae-41b3-850e-e36a69c959c0/mfig001.jpg)