KUNGL. SV. VET. AKADEMIENS HANDLING AR. BAND 41. N:0 4. 



99 



1-* 



The papillae (fig. 1 p) consist wholly of connective tissue (c) and do not con- 

 tain any cnidocysts. 



The heart lies in the anterior third of the back to the right of the stomach 

 and a little to the right of the median line. 



On the nervous system there was no mark of eyes to be seen. 



The hermaphrodite gland occupies the lower part of the tail and consists of 

 minute rounded lobes, in the periphery of which the eggs are produced, while the 

 centre is filled with the spermatoblasts. The ductus hermaphrodisiacus starts from 

 its under side, runs forward and forms an ampulla, consisting of numerous gyri. To 

 the vagina there belongs only one receptaculum seminis. 



This new and peculiar species shows the essential characters of G. typica M. 

 Sars, which was described in detail by G. O. Sars in 1872. It differs from that 

 species only in possessing cutaneous lobes on the right side, in having granulate 

 rhinophores and denticulated laterals of the radula. 

 On the other hand it differs considerably from 

 the G. typica, described by Bergh in 1886, which 

 is not identical with Sars' species, owing to its 

 possessing the following characters: it has the 

 side-lobes of the head rather small and not united 

 to the foot ; the anus is situated far behind the 

 middle of the right side ; the lips are not pro- 

 jecting ; the jaws are furnished with a denticu- 

 lated process, and the teeth of the radula are 

 serrated (lam. med. with 9 denticles on each side). 

 The liver, furthermore, is enclosed in the papil- Fig> L Transversal section through a part 

 lae. These differences were observed by Bergh, of the body of Goniaeolis lobata (cf. Plato I 

 but he supposes that Sars' examination may have |j* ^ tis f ue ff^ e ' r . m £ antle " mar « in ' c con " 

 been imperfect and that it may be possible to 

 identify the species. 



It is consequently evident that Bergh's species is a different one from M. Sars', 

 and the differences are so important, that the species must also be allotted to dif- 

 ferent genera. Goniaeolis in Bergh 1886 and 1899 shows such points of agreement 

 with Chlamylla Bergh 1886, that the two genera have here been united under the 

 last name. 



Goniaeolis of M. Sars 1861, on the contrary, owing to the structure of the liver 

 and the papillae, must be placed in a separate family, Goniaeolididae, belonging to 

 the group Tritonoidea. 



Archidoris nobilis Loven in manuscript. 

 PL I figs. 14—18. 



Body oblong-ovate, convex and rough with close-set small conical papillae. The 

 middle of the back furnished with 3 longitudinal series of larger tubercles, made up 



