40 AET. 1. — CHARLES ELIOT : 



masticatory process bears many rows of scale-like denticles. The 

 formula of the radula is about 50x230 + 1 + 1 + 1 + 230. The 

 median tooth bears six or eight lateral denticles on either side 

 but is not broad. The central cusp is fine and easily broken off. 

 It bears 2-3 additional denticles on its sides. The first lateral 

 bears 7-8 denticles but all the other teeth are smooth. They 

 are somewhat clumsy in shape and a few are bifid at the tip. 



This species presents many resemblances to P. cygnea Bgh. 

 and P. euchroa Bgh. but it differs from them in having only a 

 few side lainellaB and a very broad radula. In the breadth of 

 the radula and in many external features it resembles P. formosa 

 but in that species the teeth are regularly bifid (not as here 

 exceptionally and sporadically) and the side lamellae are very 

 numerous. Provisionally I think the animal must be described 

 as a new species, P. similis. 



Linguella variolosa Bgh. 



See Bergh, Malac. Unters, in Semper's Reisen, Theil vi, Lieferung 1, 1904, pp. 21-24, and 

 Eliot in P. Z. S. 1903, pp. 681-2. For Linguella fallax see Bargh, Baitr. zur Keantniss 

 der japanischen Nudibranckien, Verb. k. k. Zool. Bot. Ges. in Wien, xxx, 1883 pp. 177- 

 180, and Eliot in P. Z. S. 1906, 1906. p. 684. 



Two specimens from Minatomura, Izumi, 65 mm. and 30 mm. 

 long respectively. Both are now of a sandy yellow but both 

 show traces of a rosy coloration on the under side. In one the 

 back is covered with very distinct round tubercles of various 

 sizes, which tend to become arranged in straight lines in the 

 anterior portion. In the smaller specimens the tubercles are much 

 less conspicuous and though they are clearly present in some 

 parts, other parts are almost smooth. The head shield bears some 

 wrinkles but no caruncle or papilla). The branchiae form a nume- 

 rous and compact series between the body and the mantle edge, 

 but there is no special cavity or cleft to contain them. The side 

 lamelle are numerous, extending from the branchia) almost to 

 the tail and mostly set transversely. The first lamella (im- 

 mediately behind the branchia)) is rather larger than the others 

 and longitudinal. A distinct median furrow extends along the 

 whole length of the foot. 



