𝔖 Bobbio Scriptorium
✦   LIBER   ✦

NOTE ON THE “NODON VALVE”

✍ Scribed by Willis E. Tower

Book ID
114958216
Publisher
School Science and Mathematics Association
Year
1908
Tongue
English
Weight
74 KB
Volume
8
Category
Article
ISSN
0036-6803

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## Abstract Chlamydoselachus anguineus has, extending across the upper front mouth just behind the origin of the rear teeth of each row, a shelf of tissue forming a functional breathing valve. Valves of three types were found in five specimens. One has the hinder edge crescentic, another is like th