440 U.S. NATIONAL MUSEUM BULLETIN 271 



9. Outer plate of maxilla 2 gaping and geniculate (figs. lQla,b,c). 



Stegocephaloides 

 Outer plate of maxilla 2 normal (fig. 161 d) Steleuthera 



10. Upper and lower lips and maxilla 1 not elongate (figs. 160c,h), spines of outer 



plate on maxilla 2 with hooks (fig. 161c) Stegocephalus 



Upper and lower lips and maxilla 1 elongate (fig. 160d), spines of outer plate 

 on maxilla 2 lacking hooks (fig. 161d) Stegocephalina 



11. Pereopod 5 with seven articles (figs. 1 61 m,n) 12 



Pereopod 5 with three articles (fig. 161o) Tetradeion 



12. Inner plate of maxilliped reaching end of palp article 1 (fig. 161/i). 



Andaniopsis 



Inner plate of maxilliped scarcely reaching base of palp article 1 (figs. 



161/,^) 13 



13. Palp of maxilla 1 uniarticulate, article 2 of pereopod 4 slender (fig. 161 A;). 



Andaniella 

 Palp of maxilla 1 biarticulate, article 2 of pereopod 4 broad (fig. 161Z). 



Pseudandaniexis > 



14. Telson cleft deeply 15 



Telson entire or apically slit 16 



15. Flagellar article 1 of antenna 1 subequal to or shorter than peduncle; pedun- 



cular article 5 of antenna 2 subequal to or shorter than article 4; pleonite 6 



longer than peduncle of uropod 3 Andaniotes { = Metandania) 



Flagellar article 1 of antenna 1 much longer than peduncle; peduncular 

 article 5 of antenna 2 longer than article 4; pleonite 6 shorter than peduncle 

 of uropod 3 Euandania 



16. Pereopod 2 distinctly subchelate (fig. 161s) Parandaniexis 



Pereopod 2 simple 17 



17. Palp of maxilla 1 biarticulate Andaniexis 



Palp of maxilla 1 uniarticulate Parandania 



Genera of Stegocephalidae 



Andaniella Sars 



Andaniella Sars, 1895. — Stebbing, 1906. 



Type-species: Andania pectinata Sars, 1882 (monotypy) . 



Mandibular incisor toothed; palp of maxilla 1 uniarticulate; outer 

 plate of maxilla 2 not geniculate nor gaping; inner plate of maxilliped 

 scarcely reaching base of palp article 1 (Andaniopsis) , article 2 of palp 

 not produced; article 2 of pereopods 3-4 slender, of pereopod 5 broad; 

 telson entire. Species: 1, boreal N. Atlantic, littoral to bathyal. 



Andaniexis Stebbing 



Andania Boeck, 1871 (homonym, Lepidoptera) . 

 Andaniexis Stebbing, 1906 (new name). 



Type-species: Andania abyssi Boeck, 1871 (selected by Boeck, 

 1876). See Sars, 1895. 



