, 2 NUDIBRANCHIATE GASTEROPODA. 



was o-oS n,m , the length o'24 rara ; the length of the lateral teeth o - 26 n,m (the oldest only measured o.20 mm ), 

 and their height o"OC) mm . On the tongue were seen 12 series of tooth-plates, and in the radula sheath 

 n series, two of which were not fully developed; thus the whole number of series was 23. The median 

 tooth-plates (fig. 15) had 6 — 7 denticles on either side of the only slightly projecting point. The lateral 

 plates had 9 — 12 denticles on one edge (fig. 16). 



The oesophagus was of the same length as the bulbus pharyngeus. 



I am not able to decide whether this form is new, or is to be referred to one of the species 

 already described. 



Coryphella sp. 



PL I\\ fig. 20; V, figs. 11 — 13. 



Of this form one specimen was taken on Isafjord on the 7 th of June 1895, anc ^ preserved in 

 7< i° alcohol. 



This individual was 9""" long, by a breadth of 2"5 mm and a height of 3™"'; the length of the 

 rhinophores and the tentacles was i"5 mm , of the dorsal papillae 2'5 mm ; the breadth of the fore end of 

 the foot with its corners projecting in a fingerlike manner, was 2"25'" m . - The colour was now only 

 whitish with strong remnants of a dark brown pigment, especially on the back and sides. 



The form was as in other Coryphellae. The head was large; the papillae (which had for a 

 great part fallen off) appeared to be gathered into four groups that only seemed to contain few series, 

 and few papillae in each series. The anal opening was at the hind end of the second group of papillae, 

 in the dorsal edge. 



The bulbus pharyngeus was 2 mm long, of the common form; the secondary mouth cavities 

 were rather large, their hind wall black-brown, their opening wide. The mandibles were yellowish, 

 with a darker hinge-part, the masticatory edge had a series of (about 40) denticles mostly truncate 

 (fig. 11), and inside of these several irregular series of low tubercles (fig. 11). The tongue was of the 

 common form, with 5 series of tooth-plates, further back 9 series were found, two of which were not 

 yet consolidated; thus the total number of series was 14. The median tooth-plates were yellow, the 

 lateral ones almost colourless. The length of the median plates was o - 20 mm , by a breadth of o-io mm , 

 and a height of o-o8 mm ; the length of the lateral ones was almost cri4 mm . The median tooth-plates 

 (figs. 12a, 13; 20a) were of the common form, with 5 — 6 powerful denticles on each side of the short, 

 a little bent point The lateral tooth-plates (figs. 12b; 20b) had the common form, with a less deep 

 notch in the fore end, and commonly with 12 — 13 denticles. 



This Coryphella seems scarcely to be identical with the preceding one, the lateral teeth 

 especially being too different for that. 





