ELIOT : NtTDIBEANCHIATA FROM CAPE VERB ISLAITOS. 151 



"Two small specimens were obtained later, from one to five 

 fathoms at some distance off the shore." 



The preserved specimens are of a uniform greenish grey. The 

 largest is 24 mm long, and 12 mm. high at the highest point. The 

 breadth is about 9 mm. across the oral veil, and 7'5 across the back. 

 The oral veil is semicircular, and bears on its margin numerous small 

 processes. Fifteen of them are rather larger than the rest and bear 

 minute branches or knobs. Over the mouth are two ridge-like 

 tentacular folds, about -So mm long. The dorsal margin bears three 

 appendages on either side : two pairs between the rhinophores and 

 branchiae, and one just behind the branchiae. They show traces of 

 short ramitications and yellow pigment. Below, on the sides of the 

 body, are the remains of a number of smaller lateral processes, which 

 have become somewhat obliterated. On the left side, where they are 

 best preserved, twelve can be made out, apparently arranged in two 

 lines. The rhinophore-sheaths are connected with the oi'al veil. 

 They are not very high, and have smooth edges. The caudal crest is 

 raised about 2 mm. above the main mass of the tail. As preserved, 

 its edge is smooth. The branchiae are tripinnate, with a strong 

 rhachis. They can be counted as either 3 or 5. The anterior plume 

 is separate, but the two posterior plumes on either side are connected 

 at the base. The foot is narrow, and a laminated groove is not visible 

 in any of the specimens. 



The smaller specimens are only about 12 mm. long, but seem to 

 have preserved their shape better. The processes on the oral veil, 

 dorsal margin, and sides are more distinct, and relatively larger. 

 There are also a few processes on the caudal crest. But it would 

 appear that the animals cannot have been very ramose in life : not, 

 for instance, like P. Ceylonicus. 



There is a labial armature of two reddish triangular plates, composed 

 of small thickly packed thread-like rods. The radula (Fig. H) consists 

 of 15 rows which have a formula of 10 + 4.0. 10 + 4, The rhachis 

 is remarkably wide, and divided by transverse lines connecting the 

 rows on either side. The four inner teeth of each row are hamate 

 and somewhat spoon-shaped (Fig. 9). The base is large, and in the 

 innermost tooth so strongly developed that the tooth appears bitid, or 

 produces an illusion of being two teeth. The ten outer teeth are plate- 

 like, and occasionally an eleventh rudimentary tooth is present. 



The oesophagus is short, and enters almost immediately the fairly 

 large stomach, which lies in an anterior cleft of the liver, but is 

 not enclosed in the liver. The intestine is fairly long. The buccal 

 mass, oesophagus, and intestine are greenish, the stomach brown. The 

 liver is long, and extends into the tail. It is divided by a cleft into 

 an anterior and posterior portion. Internally it is of a deep chocolate 

 brown. Externally it is lighter, being covered by a white layer of the 

 hermaphrodite gland. 



The blood-gland is white and not conspicuous. The central nervous 

 system is white and of a fair size. The cerebro-pleural ganglia touch 

 one another behind, but diverge somewhat in front. The cerebral 

 and pleural portions are not distinctly divided, but the posterior half 



