Tlie Opisthobranchiala of South Africa. 77 



diameter up to 0*25 mm. ; gastro- oesophageal ganglia were wanting 

 as in the allied genera, (Nembrotha) Euplocamus and Plocamopherus. 



The nearly sessile eyes of a diameter of 0"12 mm. ; the otocysts a 

 little larger. In the lamellae of the club of the rhinophores no 

 spicula, which were almost absent in the skin (as in allied genera). 



The whitish mouth tube 8 mm. long, its inside more grayish. 

 The strong bulbus pharyngeus whitish, red or crimson on the out- 

 side and inside of the palate, the pharyngeal region and the cheeks 

 and roof of the rasp-sheath (tectum radulse) ; the length 17 and 

 22 mm. by a height of 13 and 26 and a breadth of 15 and 22 mm. ; 

 the lip disc and partly the inner mouth clothed with a whitish, 

 downwards grayish cuticle ; on the hinder end of the bulb pro- 

 jected the rounded head of the two lingual masses, and between 

 and before them the short and not large rasp-sheath plunges. 

 Against the white tongue contrasted the brownish gray rasp ; that on 

 the upper side (and quite in the same way in both specimens) 

 appeared (fig. 2) as a rather broad wall ; the length of this part was 

 in the largest specimen 16 mm. by a breadth of 8, the anterior end 

 was for a length of 10 mm. continued at the under side of the 

 tongue ; the hindermost part of the rasp was sunk in a valley and 

 then backwards and downwards continued in the rasp-sheath. This 

 last (15 mm. long) was a gray, rather thick-walled, compressed, 

 longitudinally wrinkled bag, whose cavity showed the close set 

 series of tooth-plates. The rhachidial part of the rasp seemed not 

 quite narrow. The number of series of plates in the radula more 

 than 100, and that of plates in the series scarcely less than a couple 

 of hundreds. The series were for a great part rubbed off. The 

 tooth-plates (figs. 3, 4) yellowish, uniform, small, the length of the 

 body about 0'08 mm., the height of the hook about 0*075; the hook 

 with two larger and a smaller lateral denticle.''' Some few of the 

 hinder series in the rasp-sheath were not fully developed. The 

 state of conservation did not permit a more detailed examination. 



The salivary glands about 3 cm. long, in their first fourth of a 

 diameter of 2 mm., elsewhere thinner. 



The cesophagus of crimson colour, contrasting against the grayish 

 stomach, 15 and 17 mm. long by diameter of 10-15, marked off from 

 the stomach by a slight constriction. The stomach broader in front, 

 18 and 26 mm. long by diameter of 13 and 11, entering in the trans- 

 verse furrow of the liver to the right. On the inside of the oesophagus 

 and the stomach fine longitudinal folds ; the cavity empty. The 

 intestine appears in the neighbourhood of the pylorus, runs to the 



* Alder and Hancock (I.e., -p. 134:) mention the tricuspid character of the tooth- 

 plates. 



