274 U.S. NATIONAL MUSEUM BULLETIN 271 



Microprotopus Norman 



IDercothoe Dana, 1852b. 



Microprotopus Norman, 1867b. — Stebbing, 1906. 



Orthopalame Hoek, 1879. 



Type-species: M. maculatus Norman, 1867b (monotypy). See Sars, 

 1895. 



Accessory flagellum 2-articulate, article 1 elongate; article 3 of 

 antenna 1 shorter than article 1; gnathopods siibchelate; uropod 3 

 uniramous, ramus slightly longer than peduncle. Species: 2, boreal 

 to subtropical E. Atlantic and Mediterranean, littoral. 



Photis Kr0yer 



Photis Kr0yer, 1842.— Stebbing, 1906. 



Eiscladus Bate and Westwood, 1863. Also Heiscladus, lapsus by Norman, 1869a. 



Type-species: P. reinhardi Kr0yer, 1842 (monotypy). See Sars, 

 1895. 



Accessory flagellum absent or formed of a vestigial article or scale; 

 article 3 of antenna 1 equal to or longer than article 1; gnathopods 

 subchelate; uropod 3 biramous, outer ramus equal to or shorter than 

 peduncle, inner ramus much shorter than outer ramus. Species: 41, 

 cosmopolitan, littoral (rare to abyssal). 



Podoceropsis Boeck 



Podoceropsis Boeck, 1861. — Stebbing, 1906. 

 Naenia Bate, 1862 (homonym, Lepidoptera). 

 Xenoclea Boeck, 1871. 



Type-species: P. sophia Boeck, 1861 (monotypy). See Sars, 1895. 



Accessory flagellum absent; article 3 of antenna 1 equal to or longer 

 than article 1; gnathopods subchelate; uropod 3 biramous, rami equal 

 to each other, equal to peduncle in length. Species: 6, Atlantic, 

 littoral to abyssal. 



Protomedeia Kf0yer 



Prolomedeia Kr0yer, 1842. — Stebbing, 1906. 

 Cheirimedeia J. L. Barnard, 1962a [valid subgenus]. 



Type-species: P. fasciata Kr0yer, 1842 (monotypy). See Sars, 1895. 



Accessory flagellum 3- or more articulate; article 3 of antenna 1 

 shorter than article 1; gnathopods subchelate; uropod 3 biramous, 

 rami siibequal to each other, subequal to peduncle. Species: 14, 

 subarctic, boreal Pacific (one Atlantic), littoral (?to bathyal). 



Subgenus Cheirimedeia J. L. Barnard (1962a): Like Protomedeia 

 but inner ramus of uropod 3 half as long as outer ramus. Species: 2, 

 boreal Pacific. 



