88 ON THE APPENDICES GENITALES (CLASPERSl IN THE SELACHIANS. 



Fig. 63 — 64. Acanthias vulgaris J. 



Fig. 63: Ventral fin from the ventral side; natural size. 



■ 64: The same from the dorsal side; most of the muscles arising from the body removed. 



Plate VI. 



The figures, except fig. 67 — 68, represent the right ventral fin. 



Fig. 65 — 66. Scylliam stellare. 



Fig. 65: The ventral fin from the ventral side; somewhat reduced; the greater part of the glandular 

 bag S removed; a Z) a 2 special muscles of the appendix; /"the winglike process. 



— 66: The same, from the dorsal side; af the basal opening of the appendix-slit. 



Fig. 67 — 68. Raja clavata. 



Fig. 67: The left ventral fin, from the dorsal side; considerably reduced; the terminal parts covered 

 by the aponeurosis. 



— 68: The same, from the ventral side. 



Fig. 69 — 71. Chimcvra monstrosa. 



Fig. 69: The right ventral fin, from the ventral side; a little reduced; the skin on the branches 



of the terminal part not removed; b* the medial terminal branch, b** the dorsal one, b*** 



the lateral one; p the serrated plate covered with its skin. 

 70: The same, from the dorsal side; m the muscle of the serrated plate ; x process on the 



piece b Y . 

 71: Part of the same, from the ventral side; the ventral portion of the Muse, adductor, A in 



fig. 70, removed. 



