16 U.S. NATIONAL MUSEUM BULLETIN 260 



The specimens at hand have the small process above the insertion 

 of uropod 1 very slightly larger than shown by Barnard for R. cerviis, 

 but not as large as shown for B. grimaldil by Chevreux. 



Material.— Station 7234 (2) . 



Distribution.— The type-material was collected off southern Cali- 

 fornia in a depth of approximately 1000 m. 



Rhachotropis clemens, new species 



FiGTJRE 5 



Diagnosis. — Eyes absent; rostrum extending slightly more than 

 halfway along article 1 of antenna 1, slightly downturned; lateral 

 cephalic lobes asymmetrically acute ; distal end of article 1 of antenna 



1 with three sharp cusps, remainder of antenna missing ; coxae well de- 

 veloped in comparison to B. anociiJata J. L. Barnard (1962a), coxa 1 

 strongly produced anteriorwards, blunt apically, coxae 2^ not accu- 

 minate; article 2 of gnathopod 1 having medial row of stout spines; 

 lobes of fifth articles of gnathopods interequal in size ; second articles 

 of pereopods 3 and 4 slender, posterior margins sharply serrate ; article 



2 of pereopod 5 oval, posteriorly armed wth large but sparsely occur- 

 ring serrations; pereonite 7 lacking dorsal tooth but ventrolaterally 

 produced posteriorwards ; pleonites 1 and 2 each with one postero- 

 dorsal tooth and one posterolateral tooth on each side, carinae poorly 

 developed, pleonite 3 lacking dorsal sculpture, pleonite 4 bearing one 

 large, nearly oblique dorsal tooth and one sharp cusp dorsal to inser- 

 tion of uropod 1 ; pleonal epimeron 1 with several large posterior ser- 

 rations, epimeron 2 with sinuous, minutely serrate posterior margin, 

 epimeron 3 strongly serrate ventrally and posteriorly; telson cleft 

 about one-twelfth of its leng-th. 



HoLOTYPE. — AHF No. 6121, female, 4.5 mm. 



Type-locality.— Station 7234, 27°38'00" N, 115°16'16" W, 791-842 

 m, Jan. 2, 1961. 



Material. — Three specimens from the type-locality. 



Relationship. — This species bears a close resemblance to Rhacho- 

 tropis rostrata Bonnier (1896) but differs by the presence of a lateral 

 tooth on each side of pleonite 1, the larger coxae and the smaller cleft 

 of the telson. 



Although R. clemens has affinities with R. antarctica K. H. Barnard 

 (see key in J. L. Barnard, 1957a) it differs by the absence of carinae 

 either on pleonite 3 or lateral carinae on pleonite 4. 



Rhachotropis anomala K. H. Barnard (1916) differs from R, clem- 

 ens by the absence of lateral teeth on pleonites 1 and 2 and the absence 

 of a dorsal tooth on pleonite 1. 



