NORWEGIAN OPISTHOBRANCHIATE MOLLUSCA U 



of Aeolididae. As Bergh's species was apparently closely related 

 to his genus Chlamylla, I have (in 1907) included it in this 

 genus as Chlamylla typica. Goniaeolis typica of M. Sars, on 

 the other hand, was found to be greatly different, and was even 

 referred to a distinct family. 



Goniaeolis typica M. Sars. Kristiansund, 2 sps., max. 1. 

 17 (M. Sars; prototype) — Hardangerfjord, 80 f ms, 1 sp., 1. 17. 



^^. 



\ 



Fig. 2. G. typica (cf. p. 46). Fig. 3. G. lobata (cf. p. 46). 



A comparison between the typical specimens of M. Sars 

 and the G. lobata which I established in 1907, shows that the 

 two are entirely identical. Quite as in G. lohata (cf. fig. 3). 

 there is present also in the Sarsian form a lobe of the notum' 

 a character which I considered as specific of the former. In the 

 description and the figures (here reprinted as fig. 2) given by 

 G. 0. Sars (1872)^ nothing namely is indicated on this feature. 

 Yet, in this as well as in other respects, a complete agreement 

 exists between the two forms. The radula which according to 

 Sars has smooth lateral teeth, has them finely denticulated in 

 my specimens, but this difference may be a result of variation 



1 On some Remarkable Forms of Animal Life from the Great Deeps off 

 the Norwegian Coast. L Christiania. 



