294 REV. T. R. R. STEBBING ON STALK-EYED CRUSTACEA MALACOSTRACA 



(Telson acute or truncate. . 1. Pasiphsea, Savigny, 1816. 



2 ' (Telson with bifid apex . . 2. PJiye, Wood-Mason, 1893. 



(Mandibular palp foliaceous . 3. Psathyrocaris, Wood-Mason, 1891. 



' [Mandibular palp slender, 4. 

 Fifth perseopods longer than 

 fourth ; second maxillipeds 



having an epipod . . 4. Parapasiphae, S. I. Smith, 1884. 



Fifth pereeopods not longer than 

 fourth ; second maxillipeds 

 without epipod . . 5. Sympasiphsea, Alcock, 1901. 



Of these genera the first two are closely allied, yet Phye, by its incised telson, is 

 different from all the rest, this feature being unfamiliar except in the Schizopoda and 

 some larval forms. The third genus is so different from the others that, as Alcock 

 has suggested, it " might perhaps be separated to form a distinct family." Lepto- 

 chela, Stimpson, 1860, agrees with it in having a foliaceous palp to the mandibles, 

 but the palp is one-jointed instead of two-jointed, and other features make its inclu- 

 sion in the Pasiphseidse open to question. Bate's imperfectly defined Orphania, 

 1888, is perhaps not distinct from Pasiphsea. 



Genus Phye, Wood-Mason. 



1893. Phye, Wood-Mason, Ann. Nat. Hist., ser. 6, vol. xi. p. 164. 

 1901. Pasiphsea (Phye), Alcock, Catal. Indian Deep-Sea Macrura, p. 61. 



The original definition is: "Differs from Pasiphae in the carapace and abdomen 

 being more or less extensively and distinctly carinated dorsally, in the former being 

 armed in front with a pair of branchiostegal spines, and in the telson being forked 

 at the extremity." It is said to include P. princeps, Smith ; P. acutifrons, Bate ; and 

 P. forceps, A. Milne-Edwards, 1891 ; and characters are given distinguishing these 

 species from Phye alcocki (Wood-Mason), 1891. In 1901 Alcock treats it as a sub- 

 genus, saying: "Differs from Pasiphsea in having the tip of the telson forked. In 

 all other respects, including the number and arrangement of the gills, it agrees with 

 Pasiphsea." It should be noticed that Pasiphsea truncatus, Rathbun, 1906, and 

 P. Jiagellatus, Rathbun, 1906, both have the apex of the telson truncate, while in 

 P. kahviensis, Rathbun, of the same date, the telson has " its tip cut in a very 

 shallow V." Nothing could be more satisfactory if we are looking for missing links 

 or more confusing to the interests of sharp definition between genus and genus. 



Phye scotise, n. sp. 



Plate XXX. 



By the elongation of the carina of the carapace to a smooth-pointed process 

 reaching beyond the eyes, this species is distinguished from the other members of the 

 genus. The point of the process is upturned, while in the somewhat similar process 



