NUDIBRAXCHIATE GASTEROPODA. 35 



The specimen, which had lost great part of its dorsal papilla; (they were lying loose in the 

 glass), was of a whitish colour, only the papillae being slightly brownish. The length was i8 mm by a 

 height of the body of up to 4 m,n and a breadth of 6 mm ; the length of the rhiuophores and the ten- 

 tacles was 2'5 mm , of the papillae — 3'5 mm ; the breadth of the foot in front was 4 mm , the length of the 

 tail only i n,m . 



The form was as in the other specimens. The number of the papillae in the series (numbering 

 perhaps 60) seemed to be 6 — 7. Also in this specimen the rectum shone whitish through in its course 

 to the anal papilla. 



The powerful bulb us pharyngeus together with its conical radula sheath, was 5"™ long 

 by a breadth of 3"6 mm , and a height of 2 - 4 mm . The mandibles were yellowish with black-brown hinge- 

 part; the masticatory edge as above described. The hinder wall of the secondary oral cavities was 

 seen as black-brown towards the narrow entrance. The tongue had twelve series of teeth; farther 

 back 16 series were seen, the two hindmost of which not yet consolidated; thus the total number of 

 series was 28. The median teeth were yellow, the lateral ones almost colourless; the former rose to 

 a height of o-26 mm , the latter had a length of o-25 mm . The median teeth as above, but the denticles 

 (8 — 12) most frequently a little more numerous (fig. 10) as also the denticulation on the lateral teeth 

 (fig. 9) oftenest a little more marked. 



Gonieolis, M. Sars. 



M. Sars, Beretn. ora en i Sommeren 1859 foretagen zool. Reise ved Kysten af Romsdals Amt. i860, p. 4. 

 G. O. Sars, on some remarkable forms of animal life from the great deeps of the Norwegian coast. I. 



1872. p. 39-40. 

 R. Bergh, die Nudibranchieu .... des Willem Barents?. 1885. p. 13—18 (Bijdrageu tot de Dierkunde. 



Aflevering XIII. Amsterdam. Onderzoekings-tochten van de Willem Barents Expeditie. 



Gedeelte IV (1886). 1888). 

 , 1. c. 1892. p. 1029. 



Corpus oblongum, subdepressum, subpalliatum; caput sat latum tentaculis fortibus productum; 

 rhiuophoria fortia, simplicia, elongata; podarium dorso paullo latins, autice vix angulatum. 



Mareo masticatorius seriebus denticulorum minutissimorum armatus. Dentes laterales radulae 

 fere lit in Coryphellis. 



This genus, which belongs to the family of the Coryphellidae, has the characters common in 

 this family; the long, simple rhinophores and a lateral tooth on each side of the median teeth of the 

 radula. It is most nearly related to the genus Chlamylla^ and it will perhaps, by further examinations, 

 be impossible to maintain the generic separation of these two generic forms. 



Gonieolis has a somewhat pecidiar and depressed clumsy form with projecting dorsal edges, 

 and colossal rhinophores and tentacles; the masticatory edge of the mandibles has several series of 

 quite small irregular knobs. 



5* 



