218 U.S. NATIONAL MUSEUM BULLETIN 271 



Epistome lacking large anterior process 11 



10. Postantennal cephalic angle acutely produced Atyloella 



Postantennal cephalic angle presumably rounded Liouvillea 



11. Both articles 5 and 6 of gnathopod 2 long and sublinear (fig. 92k) .... 12 

 Either article 5 or 6 of gnathopod 2 not long and sublinear 14 



12. Convex side of dactyli on pereopods 3-5 with accessory spine or spines 



(fig. 93e) 13 



Dactyli of pereopods 3-5 lacking posterior accessory spine . . Schraderia 



13. Pereopods 1 and 2 with dactylar spine, article 2 of first antennal peduncle 



shorter than article 1 Djerboa 



Pereopods 1 and 2 lacking dactylar spine, article 2 of first antennal peduncle 

 longer than article 1 Bathyschraderia 



14. Gnathopods not subchelate (like Harpinioides in Calliopiidae) (figs. 92d,p). 



15 

 Gnathopods distinctly subchelate 16 



15. Probably each of articles 4-6 of pereopods 3-5 not longer than article 2. 



Harpinioidella 

 Each of articles 4-6 of pereopods 3-5 longer than article 2 . . . Harcledo 



16. Accessory flagellum distinctly articulate, usually cylindrical, often as long 



as article 1 of primary flagellum (figs. 89h,i) 17 



Accessory flagellum usually absent, when present formed of a fused scale or 

 process, not articulate (figs. 89eJ,g) 26 



17. Inner plate of maxilla 1 with more than four setae, setae generally lining 



medial edge and apex (figs. 9ld,e). 



Paramoera (and Atylopsis in Calliopiidae) 

 Inner plate of maxilla 1 with four or fewer terminal setae (figs. 9lc,g) . . 18 



18. Article 6 of gnathopod 2 twice as long as article 5 19 



Article 6 of gnathopod 2 subequal to article 5 in length 24 



19. Article 6 of pereopods 3-5 subequal to or shorter than article 2 .... 20 

 Article 6 of pereopods 3-5 longer than article 2 23 



20. Accessory flagellum as broad as long (fig. 89/) 21 



Accessory flagellum long, rectangular (fig. 89h) 22 



21. Telson deeply cleft (fig. 910 Accedomoera 



Telson apically notched (fig. 91m). 



Paramoera (and Atylopsis in Calliopiidae) 



22. Upper lip bilobed Ronco 



Upper lip rounded ventrally Eusiroides 



23. Body carinate, accessory flagellum 2-articulate Rhachotropis 



Body smooth, accessory flagellum 1-articulate Cleonardo 



24. Body carinate Cleonardopsis 



Body smooth 25 



25. Article 6 of gnathopods narrower than fifth Pseudomoera 



Article 6 of gnathopods as broad as fifth Accedomoera (in part) 



26. Anteroventral cephalic angle with large tooth, coxa 1 produced forward to 



anterior edge of eye (fig. 936) Rozinante 



Anteroventral cephalic angle with small tooth or none, coxa 1 not pro- 

 duced 27 



27. Inner plate of maxilla 1 with four or fewer terminal setae 28 



Inner plate of maxilla 1 with more than four setae and some setae lining 



medial edge (fig. 91e) 32 



28. Articles 4, 5, and 6 of pereopods 3-5 each 1.5 times as long as article 2. 



Harcledo 

 Articles 4, 5, and 6 of pereopods 3-5 not longer than article 2 29 



