GAMMARIDEAN AMPHIPODA 59 



clearly indicated that Trypliosella was a name proposed to replace the 

 "tryphosa" concept of Sars. I, therefore, select Trypliosella sarsi 

 Bonnier (1893) as type-species of Trypliosella and assign all 

 "tryphosas" except Anonyx nanus Kr0yer to Trypliosella. This 

 negates my (19G2a) synonymization of Trypliosella with JJi^stes even 

 though T . harhatlpes is still removed to TJr'istes. It also negates my 

 (1962a) synonymization of Tmetonyx Stebbing (1906) with Trypliosa^ 

 and Tmetonyx is revived to include only its type-species Oniscus cicada 

 O. Fabricius. That genus differs from Trypliosella {='"'' Tryphosa^'' 

 auct.) in the normally quadrate coxa 1. 



Orchomene pinguis (Boeck) 



Figures 25, 2G 



Anonyx pinguis Boeck, 1S61, pp. 642-643. 



Orchomene pinguis. — Boeck, 1876, pp. 176-177, pi. 5, fig. 1. — J. L. Barnard, 1964a, 



p. 90, fig. 21 E-M. 

 Orchomenella pinguis.— Sars 1895, pp. 67-68, pi. 24, fig. 2— Stebbing, 1906, p. 82.— 



Gurjanova, 1962, pp. 165-167, figs. 48, 49. 

 [More than 30 other references with records of this species are not cited.] 



Mateeial.— USNM Ace. No. 2'17045, Santa Monica Bay, Calif., hag- 

 fish trap, 183 m (180 specimens) . 



Female specimens from a trap in 183 m in Santa Monica Bay have 

 been compared minutely with female specimens from Woods Hole, 

 JSIass. collected m 1878 (deposited in Smithsonian Institution) . Simi- 

 larities and differences are listed in two paragraj)hs to follow. 



Similarities. — Antenna 1 has several short lateral setae on the ven- 

 trodistal margin of aiticle 1 of antenna 1 ; coxae are all similar in 

 shape; pleonal epimera 3 are generally similar; mandibles, lower lips, 

 maxillae 1 and 2 and maxillipeds are very similar even as to spines 

 and their shapes, with small exceptions noted below ; article 6 of gnath- 

 oped 1 similar ; uropods 1-3 and telson ; hump of pleonite 4 ; article 5 

 of antenna 2 shorter than article 4. 



Differences. — All of the specimens from the California trap are 

 either o vigorous females, females with oostegites or juveniles having 

 the appearance of normal females ; however, most of the adult oviger- 

 ous females, except for that one figured herein have second antennae 

 with flagella conmiencing a male-like elongation through articular pro- 

 liferation ; lateral cephalic lobes of the Calif ornian population slightly 

 narrower than those from Woods Hole; eyes extremely enlarged, ir- 

 regularly flask shaped, ommatidea extremely numerous and com- 

 pacted ; anterior epistomal margin longer and flatter, lobe of upper lip 

 relatively smaller; triturating surface of mandibular molar slightly 

 weaker; posterior lobe of article 5 of gnathopod 1 broader; article G of 



242-332— G7 5 



