PLATE IV 



Fig. lOO. Cymbitliopsis intermedia n. sp., oral view. 2 X. 



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



Fig. I02. Same shell, (aboral) posterior view. 2 X. 



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



Fig. 104. Same shell, posterior view. 2 . 



Fig. 105. A specimen of Cymbiiliopsis without shell, anterior view. 2 x. 



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. 1 10. Large shell of the same, posterior view. 2 ■ . 



Fig. III. Pallial gland of Cymbitliopsis intermedia n. sp., from the outside, a, b, c, three transverse, 



transparent bands. 

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



in fig. III. 

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



i, intestine ; a, anus. 

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



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



(/, opening of the kidney into the mantle-cavity; e, opening of the mantle to the exterior; 



pc, pericard. 

 Fig. 115. Central nervous system of Cymbiiliopsis 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 Gleba 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. 



