400 U.S. NIATIONAL MUSEUM BULLErTIN 271 



an accessory flagellum does exist and if pleonites 4-5 do bear large 

 teeth then the genus would be referable to Halice. Meanwhile it is 

 treated as distinct in the following key. Birstein and Vinogradov 

 (1960, 1962, 1964) have referred their species, Halice nana and H. 

 indica, to Halicoides; and Synopioides tertia Stephensen (1931) to 

 Halice (see Birstein and Vinogradov, 1962) but suggest the latter also 

 might be assigned to Halicoides. A different point of view seems more 

 reasonable until some of these species, including Halice anacantha 

 K. H. Barnard (1925) have been more thoroughly described. Birstein's 

 and Vinogradov's (1962) diagnosis of Halice is reasonable, except that 

 they include Halice tertia and H. anacantha which spoil the definition, 

 because H. tertia does not have a conjoint article 1 of the primary 

 flagellum of antenna 1, and both H. tertia and H. anacantha have 

 obsolescent teeth on pleonites 4-5. The flagellum of H. anacantha is 

 unknown except for K. H. Barnard's statement that the complete 

 antenna resembles that of Halice abyssi. If these two aberrant species 

 were removed from Halice the diagnosis could be strongly tightened 

 and should be so done as a provisional measure until further Ught can 

 be shed by redescriptions and discovery of expected new abyssal 

 pardaUscids. Undoubtedly H. tertia is congeneric -with Pardisynopia 

 tamhiella J. L. Barnard (1961) and P. synopiae J. L. Barnard (1962b) 

 but scarcely with Halicoides anomalus (type) if conjoin ting of the 

 primary first antennal flagellum and obsolescence of pleonal teeth are 

 diagnostic. Thus, Pardisynopia is retained as a genus distinct from 

 Halice and Halicoides which have conjoint flagella. Halice anacantha 

 K. H. Barnard is temporarily removed to Pardisynopia until the 

 condition of antenna 1 is verified. Halicoides indica and H. nana also 

 are provisionally assigned to Pardisynopia, even though uropod 3 of 

 H. nana appears to lack article 2 on the outer ramus. 



Key to the Genera of Pardaliscidae 



1. Telson entire (fig. 143/) Parpano 



Telson deeply cleft (fig. 144n) 2 



2. Articles 4-5 of pereopods 1-2 inflated (fig. 144a) 3 



Articles 4-5 of pereopods 1-2 not inflated (fig. 143a) 5 



3. Antenna 1 lacking accessory flagellum (or bearing scale on article 2) . 



Halicoides 

 Antenna 1 bearing accessory flagellum 4 



4. Antenna 1: basal part of flagellum inflated or narrow, but segmented (fig. 



143e), flagellar article 1 scarcely longer than article 3 of peduncle, urosomal 



teeth vestigial Pardisynopia 



Antenna 1 : basal part of flagellum inflated, conjoint ^ (fig. 143/), thus flagellar 

 article 1 nearly as long as peduncle, urosomal teeth strong . . . Halice 



' Incompletely segmented. 



