672 SIR C. ELIOT ON NUDICRANCUS [JuilG 19, 



Just below the oral veil on either side are two flat folded lobes 

 (4 mm. long by 3 bi'oad) which appear to i-epresent tentacles. 



A huge prolDoscis, unlike anything which I have ever seen in 

 the JSTudibranchiata, is everted under the oral veil and folded 

 under the body of the animal (PI. XLYII. fig. 2 b). It is 98 mm. 

 long, and 34 mm. broad at its base, but tapei'S towai-ds the tip, 

 whei'e it is about 8 nmi. broad. The radula, which was found at 

 the point marked c on this proboscis, is torn into several longi- 

 tudinal strips, and the rhachis and innermost teeth can no longer 

 be distinguished. When perfect, the ribbon must have been very 

 large, consisting of between 300 and 400 tiunsverse rows, each 

 containing at least 200 teeth on eithei' side of the rhachis. All 

 the teeth examined are as figured by Fari'an {I. c. plate iii. 

 figs. 23, 24), tricvispid with long bases. 



Fi'om this strange buccal apparatus a strong muscular tube, 

 ahout 30 mm. long, 12 mm. wide, and nearly straight, runs to the 

 liver, entei'S it and I'e-emerges as the intestine. AVithin the liver 

 is a small stomach which seems to receive onlj one hepatic duct. 

 The walls of the stomach and intestine are quite distinct within 

 the liver. The liver itself is about 57 mm. long and 38 bi'oad, 

 tapering posteriorly. It is elongate-ovate in shape and greyish 

 in colour. Its relations to the hermaphi-odite gland are not clear. 

 The central nervous system is enclosed within a strong white 

 capsule, but is itself I'ather dar-k grey. The general outline is a,s 

 usual, suggesting the three pairs of ganglia, but no division into 

 ganglia is traceable in its substance. It seems to be composed of 

 a mass of large and small giunules not set in groups. 



The genitixlia are not well preserved, but owing to their large 

 size the principal features can still be ascertained. The ampulla 

 of the hei'uiaphrodite gia,nd is much convoluted. It is about 

 3 mm. broad and, as coiled, 30 mm. long. At its end comes the 

 bifui-cation of the male and female branches. The first part of 

 the male bi'anch is enveloped in a lai'ge lobed organ, which is 

 apparently the mucus-gland, and enters the female bra rich close 

 to the bifurcation. When free fi-om this gland, the male branch 

 appears as a broadish tube (5 mm.) with rather thin walls. It 

 dilates into an elliptical expansion (presumably a prostate) about 

 15 mm. long and 10 mm. broad, with thickish walls and empty 

 inside. After this dilation it becomes a thin-walled fi'ee tube, 

 35 mm. long and 5 mm. broad, running to the penial pouch. 

 The vas deferens within the pouch is straight and not convoluted. 

 The lower part of the vas deferens beai'S an a,rmature of numerous, 

 minute, brownish spines of very various shapes and sizes — long, 

 short, straight, wavy or hooked, but mostly with narrow bases. 

 The glans penis is formed, as Bergh says, somewhat as in 

 Phicdodoris. Thei'e seem to be two elongate lateral folds of skin, 

 and in the middle another fold suri'oundiug a rather ii-i'egular 

 opening. After the bifurcation the female bi'anch is thin and 

 constricted. It receives the ducts of the above-mentioned mucus- 

 gland (?) and of the large hard albumen -gland. Then comes the 



