PLATE IV. 



Fig. lOO. Cy)nlutliopsïs internicdia n. sp., oral view. 2 ■. 



Fig. lOi. Empty shell of the same species, oral (anterior) view. 2 •. 



Fig. 102. Same shell, (aboral) posterior view. 2 • . 



Fio-. 103. Another empty shell, most probably belonging to the same species. Anterior view. 2 X. 



Fig. 104. Same shel!, posterior view. 2 ■ . 



Fig. 105. A specimen of CymbuUopsis without shell, anterior view. 2 ^■. 



Fig. 106 — 108. Larval Cymbulidae, perhaps belonging to different species. In fig. 106 the penis is evaginated. 



Fig. 109. Gleba cordata Forskal from Naples. Anterior view. 2 X. 



Fig. iio. Large shell of the same, posterior view. 2 •. 



Fio-. III. Pallial gland of CymbuUopsis inter media n. sp., from the outside. a, b, c, three transverse, 



transparent bands. 

 Fig. 112. Pallial gland of GU-ba cordata Forskal, from the outside. a, b, c, have the same meaning as 



in fig. III. 

 Fig. 113. Digestive tract of CymbuUopsis intermedia n. sp. Ventral view. oe, oesophagus; v, stomach ; 



/, intestine ; a, anus. 

 Fig. 114. Heart and kidney of GMm cordata Forskal, ventral view. 



a, ventricle of the heart; ao, and ao.,_, two vessels issuing from it; b, kidney; c, mantle-cavity ; 



d, opening of the kidney into the mantle-cavity; c, opening of the mantle to the exterior; 



pc, pericard. 

 Fig. 115. Central nervous system of Cymbuliopsis intermedia n. sp., from the right side. 



a, cerebral commissure; c, cerebral ganglion; /, pedal ganglion; v, right visceral ganglion; pv., 



posterior visceral ganglion; i, nerve to the tentacle; 2, nerve to the penis; 3, nerve to the 



proboscis, innervating its retractor muscle; 4 and 5, nerves to the fins; 6, pallial nerve; 



7, visceral nerve; ot, otocyst. 

 Fig. 1 16. Central nervous system of Glcba cordata Forskal, from the right. Explanation of letters the same 



as in fig. 115, 

 Fig. 117. Distribution of the nerves in the fins of Gleba cordata Forskal. 



