288 SIR C. ELIOT ON NUDIBRANCHS [NoV. 29, 



counting the small ones on the tail. The cerata are long, cylin- 

 drical, and transpai'ent, allowing the ramifications of the liver to 

 be distinctly seen. As noticed in the living animal, these latter 

 are long and thin, with well-developed knobs or short branches. 

 The rhinophores and tentacles ai^e also long and thin ; the former 

 bear about 15 rings near the top, but are smooth below. The 

 foot is very narrow, with thin projecting margins : in fi^ont it is 

 expanded into a semicircular disk ; the anterior mar-gin is grooved, 

 and the corners are rounded. 



The jaws, which were examined in all three specimens, were 

 transparent and very delicate. No denticles were to be seen on 

 the edge, and, though it is hard to be certain of their absence 

 in dealing with such slight and colourless material, it is to be 

 observed that they were found without difficulty in other similar 

 forms. The raduJa consists of a single series of horseshoe-shaped 

 teeth numbering 23, 20, and 18 respectively, in the three specimens. 

 Thin, pointed, lateral denticles extend almost up to the tip of the 

 centi-al cusp : there are as many as 20 on either side, but 

 sometimes the number sinks to 15. 



I think these specimens should be referred to Pliidiana, in 

 spite of the doubt about the jaws, and should form a new species, 

 chiefly characterised by the large number of lateral denticulations 

 on the teeth. Also, the branches of the liver, which in other 

 species are covered with knobs, seem to bear distinct short 

 branches. 



Facelina lineata. sp. n. (Plate XYI. figs. 4 & 5 ; and Plate 

 XVII. figs. 10 & 11.) 



Two specimens from Zanzibar. 



The notes on the living animal say that it had a general resem- 

 blance to Hervia lineata, which was caught about the same time, 

 but the colours were brighter, and there was an oi-ange-red ring 

 round each of the cerata near the tip. The rhinophores were 

 jet-black. There were white lines on the body but not on the 

 cerata, and there were three red blotches between the tentacles 

 and rlainophoi'es. The tail was long, and there was a very deep 

 groove along the front of the foot. 



The largest of the preserved specimens is 6 mm. long and 

 2"5 mm. broad, but is evidently much contracted. The colour is 

 a uniform alcoholic yellow, except that the rhinophores are still 

 black. The disposition of the cerata is not quite clear, as many 

 have been lost, but appears to correspond with the drawing. The 

 genital orifices seem to be below and between the first and second 

 group, and the vent after the third. The cerata are longish and 

 cvlindrical. The oral tentacles are large and thick, but are clearly 

 much contracted, as are also the rhinophores, the perfoliations on 

 which are not so distinct as might be expected from the drawing 

 of the living animal (PI. XVI. fig. 4). The narrow foot is 

 expanded at the sides into thin margins, and anteriorly into 

 deeply grooved tentacular processes. 



