JAPANESE NUDIBEANCHS. 39 



shield which are clearly figured by Bergh. (3) Its radula has a 

 formula of 44x36.1.36 and only six or eight of the inner teeth 

 are denticulate, the rest being smooth. If an examination of 

 further material shows that these features are subject to varia- 

 tion, the specimens now under examination might be referred to 

 P. compta but they alP differ from Bergh' s description in the 

 same points and must, I think, be regarded provisionally as a new 

 species. P. stenidia Bergh (Siboga Exp. pp. 214-215) is also 

 nearly allied. 



Pleurophyllidia similis sp. nov. 



For P. cygnea see Bergh in Malak. Blatter 1879, p. 9, and Basedow and Hedley, Trans. 

 Roy. Soc. S. Australia 1905, p. 149. P. euchroa, Bergh, Trans, of S. African Philos. Soc. 

 Vol. xvii, 1907, p. 102. P. formosa, Bergh in Yerhandl. der k. k. Zool.-ßot. Ges. in 

 Wien, 1869, p. 225 ff„ and Farran in Ceylon Pearl Oyster Keport, Opisthobr. Mollusca 

 1905, p. 333. 



Three large specimens from Misaki, about 60 mm. long and 

 30 mm. broad. There are no notes on the appearance of the 

 living animal. As preserved the under and anterior parts are of 

 a pale faded brown, perhaps representing an original pink. The 

 dorsal surface has much the same ground colour but bears about 

 thirty dark brown double stripes. Sometimes the double stripe 

 consists of two perfectly distinct lines with a clear pale stripe 

 between them but sometimes the two dark lines unite here and 

 there across the pale interval. 



The caruncle is not distinct but appears to be bifid. The 

 foot is large and is traversed throughout its entire length by a 

 conspicuous furrow. The numerous branchiœ are arranged in an 

 even and distinct row but are small, not exceeding 4 mm. in 

 length. The side lamellae are 8 in number. Five of them are 

 relatively smooth and straight, but interrupted and sometimes 

 only a centimetre or so long. The remaining three are thicker 

 and much crinkled. They run among the smaller lamella? conti- 

 nuously from the branchiae to the extreme end of the body. 

 Cnidopores are not conspicuous. 



The jaws are large, elongate and transversely striated. The 



1) Only two radulœ were examined. 



