40 NUDIBRAXCHIATE GASTEROPODA. 



the seminal duet were seen, behind them on the inside the prostate gland, and under that the seminal 

 bag was found. The ampulla was ic/ 1 "" long by a diameter of 2 n,m ; anteriorly it sends forth a quite 

 short oviduct and a seminal duct a little longer. The latter formed a large prostate mass (fig. i e), 

 long, 3'5 mm high, and 3'"'" thick, which mass was bent once or twice, and measured, when stretched 

 out, 20 n,m by a diameter of 2 mm ; it consisted of close set, quite fine windings; anteriorly it tapered a 

 little, and passed into the muscular continuation of the seminal duct (fig. 1 d). The windings of this 

 duct measured, when stretched out, i8 mm ; it tapered anteriorly, and ended in a hollow on the top of 

 the 2-5 mm broad, thin-walled hinder end of the penis bag (fig. 1 e), which bag continues in the outer, 

 free part (fig. 1 f) that inclosed 4'"™ of the glans (fig. 1), the whole length of which was 6-5 mm , and which 

 is covered by a strong ciliated epithelium; the seminal duct that grew thinner in its course, continued 

 in snake-like windings to the very point of the glans. The seminal bag (fig. 1 g) the position of 

 which is rather hidden, is globular, of a diameter of 2-5 m '"; it passes by degrees into its only a little 

 longer duct (fig. 1 hi. The whitish and limewhite mucous -albuminiparous gland formed the greater 

 part of the anterior genital mass. 



This species is especially by the remarkable formation of a fold on the right side of 

 the body marked off from both the other species, from which it further appears to deviate with 

 regard to the nature of the lateral teeth of the radula. 



Subfam. Tergipedinae. 



R. Bergh, System der nudibranch. Gasteropoden. 1892. p. 1024 — 1027. 



This group contains forms with a somewhat compressed bodv, simple rhinophores, and a latero- 

 dorsal position of the anal papilla; the dorsal papilla; are short and thick, clubshaped, and, as it were, 

 arranged in one or a few longitudinal series; the foot is rounded anteriorly. -- The masticatory edge 

 of the mandibles bears mostly a single series of denticles; the tongue has most frequently only a 

 single series of tooth-plates. The otocyst contains only a single otolith. 



The family comprises the genera: Tergipes (Cuv., Aid. et Hauc.) with a single series of papilla; 

 and unarmed penis; Capellinia (Trinchese) also with only one series of papillae, but with three series 

 of tooth-plates (like the Galvinae) and with armed penis; Embletonia (Aid. et Hanc.) has one or more 

 series of papilla;, a smooth masticatory edge, and unarmed penis; nearly related with this genus is 

 Ennoia (Bgh.), which has, however, real tentacles (and not head-lobes). Amphorina (Ouatrefages) has 

 peculiar tooth-plates, large Gl. ptyalinae, and armed penis; Galvina (Aid. et Hanc.) has three series of 

 toothplates, also Gl. ptyalinae, but unarmed penis; Myja (Bgh.) resembles somewhat Tergipes, but has 

 a smooth masticatory edge; perhaps also the singular Forest ia (Trinchese) in which the radula is 

 transformed into a serrated band, must be referred to this family. 



