152 PROCEEDINGS OF THE MALACOLOGICAL SOCIETr. 



shows indications of being a round body fused with a less regular and 

 somewhat oblong body in front. The pedal ganglia are roundish. 

 The eyes are large and black. From the indistinct proximal olfactory 

 ganglia runs a longish and thick connective to the rather large distal 

 olfactory ganglia. 



The vas deferens is strong, thick, and convoluted. Into it opens 

 at some distance from its termination the whitish flocculent ramose 

 prostate, which is also spread over the spermatotheca. The spermato- 

 theca is very large and globular, greenish, but filled with brown 

 matter. The spermatocyst is small and pear-shaped. The termination 

 of the female branch is very thin. The penis is exserted. The 

 external organs consist of folds of skin and a curved cylindrical tube, 

 nearly 5 mm long if straightened out. The glans bears hamate spines 

 somewhat resembling the teeth of Dorids, set in numerous regular rows. 



This animal is, I think, clearly Lowe's Plocamopherus {Peplidia) 

 Madera. He mentions that it swims like the larva of a gnat, and is 

 brilliantly phosphorescent. 



DoTO oBsctJRA, n.sp. PI. XIV, Fig. 10. 



Five specimens described as coming from washings of seaweed and 

 Pennaria. The notes on the living animals say that the colour as 

 a whole was reddish brown in the small specimens and black or dark 

 grey in the larger. The body was of a very dark grey, almost black, 

 but the shade varied, forming a mottled pattern. The cerata were 

 thick, of a red-brown colour, the tubercles black, or, in small 

 specimens, dark grey. The rhinophore- sheaths were large, with 

 anteriorly expanded rims, the lip being very mobile. 



In the alcoholic specimens the body is mottled purplish black, with 

 lighter markings. The cerata are yellowish, with large purplish 

 black spots at the end of the tubercles. The foot is yellowish. 



The largest specimen is 7 mm. long, and 4 broad across the cerata. 

 There are seven pairs of cerata, of which even the last bear tubercles, 

 and are not mere warts. Their form is rather irregular ; the terminal 

 tubercle is generally remarkably well developed, but sometimes 

 atrophied. As a rule the tubercles are set in four rows — 4 (rarely 5) 

 in the topmost row, 5-6 in the middle rows, 4-5 in the two lowest. 

 The tubercles on the inner side of the cerata are often imperfectly 

 developed. The dimensions of the largest cerata are 3 X 1'5 or 

 3 X 2-5 mm. 



The yellow and conspicuous anal papilla is on the right-hand side 

 between the first and second cerata, but further inwards. The genital 

 orifices are under the first of the cerata, on the right-hand side. The 

 rhinophores are white ; their sheaths are black, and have the anterior 

 margin expanded and prolonged (Fig. 10). In front of each of the 

 sheaths is a tubercle. The oral veil is rounded, fairly ample, entire, 

 with a yellowish rim. 



The jaws are very thin and membranous. The radula consists of 

 a single series of 72 teeth, fairly broad, with a moderately high 

 central cusp and two or three not very distinct lateral denticles. The 

 intestines are yellowish. 



