ON THE APPENDICES GENITALES (CLASPERSl IN THE SELACHIANS. 



85 



Plate I. 

 Fig. I — 9. Somniosus microcephalus. 



Fig. i: The skeleton of the right ventral, viewed from the dorsal side; considerably reduced. 



— 2: The chief piece of the right appendage, viewed from the dorsal side; reduced. / the lateral 



surface; x articular surface for attaching the piece j3. 



— 3: The same skeletal part, from the ventral side. 



— 4: The dorsal terminal piece, 7¥, from the dorsal side. 



— 5: The same piece, from the ventral side. 



— 6: The ventral terminal piece, Tv, from the dorsal side. 



— 7: The same piece from the ventral side. 



— 8: The thorn or sptrr*, T,, from the dorsal side. 



— 9: The same, from the ventral side. 



Fig. 10 — II. Acanthias vulgaris. 



Fig. 10: The skeleton of the right appendage, from the dorsal side; natural size. 



— 11: The same skeletal part, from the ventral side. 



Fig. 12 — 13. Spinax niger. 



Fig. 12: The skeleton of the right appendage, from the dorsal side; a Httle enlarged. 



— 13: The same, from the ventral side. 



Fig. 14 — 15. Chimcera monstrosa. 



Fig. 14: The skeleton of the right ventral, from the dorsal side; natural size, x process on the piece 

 b^\ d*, 6**, i*** the medial, dorsal, and lateral branches af the appendix-stem. 



— 15: The same skeletal parts, from the ventral side. 



Plate II. 



All the figures represent the skeleton of the appendage of the right ventral fin (or parts of it). 



Fig. 16 — 17. ScyUiiim canicula. 



Fig. 16: The skeleton of the appendage, from the dorsal side; natural size. 



— 17: The same, from the ventral side. 



Fig. 18 — 19. Scyllinm stellare. 



Fig. 18: The appendage, from the dorsal side; natural size. 



— 19: The same, from the ventral side. 



