483 



collection of the "Terra Nova" expedition, the maxillae were totally rudi- 

 mentary or absent. Thus one cannot rule out the retention, in some cases, 

 of a rudimentary maxillary apparatus; consequently this character, with 

 precedence from Metalycaea globosa, does not preclude the inclusion of 

 Simorhynchotus in the family Lycaeidae. The artificiality of inclusion of 

 Simorhynchotus in Oxycephalidae was noted by other authors as well. 

 In particular, Pillai (1960) wrote that only lack of unanimity of opinion 

 among leading specialists on Hyperiidea cautioned him against transfer- 

 ence of this genus to the family Lycaeidae. Undoubtedly, however, the 

 families Lycaeidae and Oxycephalidae are phyletically linked and the 

 genus Simorhynchotus might well be the link between them. 



1. Simorhynchotus antennarius (Claus, 1871) (Fig. 211) 



Claus, 1871: 156 (Simorhynchus); 1879b: 43 (Simorhynchus); 

 1887: 65 (Simorhynchus). — Stebbing, 1888: 1572; Stephensen, 

 1925a: 185; Spandl, \911: lU.—lilljeborgii Bovallius, 1887a: 34.— 

 stebbingi Bovallius, 1890: 48. 



Length of sexually mature specimens 5-7 mm. 



The head does not form a rostrum. The 1st segment of the flagellum 

 of antennae I in males has a characteristic projection in the distal part of 

 the anteriof margin, while the posterior distal process reaches the end of 

 the 2nd segment. Antennae II in males are the same as in Lycaea. The 2nd 

 segment of pereopods I has a bulged anterior margin and a straight poste- 

 rior one; the 4th segment is barely broadened distally; the 5th segment is 

 somewhat broader than the 4th, has bulged margins, and is twice as long 

 as wide; the 5th and 6th segments have smooth margins; the claw is very 

 short. The 2nd segment of pereopods II is longer than the distal segments 

 together by almost 1.5 times; the 5th segment is distally broadened and 

 its posterior distal angle straight, the apex with closed subchela reaching 

 the middle of the 6th segment; the subchela has smooth margins armed 

 with sparse setae. Pereopods V are the longest; the 2nd segment is oval, 

 twice longer than wide, and the anterior margin bears sparse marginal 

 setae; the 6th segment is longer than the 5th, narrow, and slightly curved; 

 the margins of the segments are not denticulate. The 2nd segment of pere- 

 opods VI is strongly broadened in the proximal part, the anterior margin 

 almost almost straight, and the posterior margin bulged; the 4th segment 

 is twice as long as the 5th and equal to the 6th; the 6th segment bears 

 sparse fine denticles along its anterior margin. The 2nd segment of pere- 

 opods VII is broadened, the anterior margin straight or barely curved, 

 and the posterior margin markedly bulged; the distal segments together 

 are slightly longer than half the length of the 2nd segment. 



The basipodite of uropods I is generally shorter than the endopodite 



and has smooth margins. The basipodite of uropods II and III is fused 



392 with the endopodite. The rami of all the uropods have pointed tips; 



