^^7^-1 THE COREAN AND JAPANESE SEAS. 41 



me in 1877 as Leucosia perryi, and which is distiuguished from P 

 tridentata by the smooth and polished carapace, which is defined by 

 a continuous marginal beaded line. (See Trans. Linn. Soc. Zool 

 1. p. 238, pi. xxxviii. figs. 19-21, 1877.) 



The geims Leucisca of MacLeay (Annulosa in Smith's Zool. S. 

 Africa, p. 70, 1838), which resembles Leucosia, and in which no 

 mention is made of the existence of a thoracic sinus, differs from 

 I'seudophilyra and Leucosia in having the exognath of the outer 

 max^ilhpeds robust and curved, and the eyes placed on either side 

 at the base of the front, not at the antero-external angles. 



PSEUDOPHILYRA TRIDENTATA, Sp. H. (Plate II. fig. 4.) 



Carapace (with front) longer than broad, very coarsely puuctulated 

 except on the frontal region, where the punctulations are very fine. 

 Frontal margin tridentate, the front itself narrowed and much pro- 

 duced, as in the genus Leucosia. There is a distinct elevation on 

 the hepatic region, and immediately in front of it a marked de- 

 pression. A minutely beaded Une defines the posterior and postero- 

 lateral margins of the carapace, becoming obsolete on the antero- 

 lateral margin. The inferior surface of the body is smooth ; the 

 exognath of the outer maxilHpeds is rather broad, but its outer mar- 

 gin nearly straight, not arcuated as usual in Philyra. The postab- 

 domen of the male has all the joints except the last coalescent, but 

 the sutures are not entirely obliterated. Colour light brownish-pink 

 Length 4^, breadth 4 lines. 



One specimen, a male, was collected in lat. 33° 4' N.. Ion* l-?q° 

 I8'E., in 23fms. *' " 



In this specimen the legs are unfortunately wanting ; an anterior 

 leg that was in the same phial, and probably belongs to the speci- 

 men, has the arm very finely tuberculated, wrist and hand smooth, 

 fingers slightly gaping at base when closed. 



Philyra, sp. 



Several specimens (males and females) of a species of Philyra, on 

 account of their small size (their length is only about 3 hues), I do 

 not designate by a distinct specific name, as they may not be fully 

 matured. They resemble Ph. platycheira, De Haan, in the form of 

 the carapace, which is nearly smooth and marked with a distinct 

 depression between the cardiac and branchial regions, in the very 

 finely granulated arms, &c. The anterior legs, however, are much 

 shorter than in that species, the palm shorter and more swollen, and 

 the fingers less compressed. The pterygostomian region is not an- 

 gulated, and the intestinal region rather convex. From the P. pisiim 

 described by De Haan this species differs in the non-angulated ptery- 

 gostomian region, from the P. tuberculosa, Stimpson, from Hong- 

 Kong, in the non-tuberculated carapace, and from the P. unidentata, 

 Stimpson, from the China Sea, in the form of the front. It may not 

 improbably be a distinct species from any hitherto described. 



Collected at Matoya, in 6| fms. 



