150 U.S. NATIONAL MUSEUM BULLETIN 260 



ramus of uropod 3 has been detected in /S. kataUa. Indeed, that species 

 may require the erection of a new genus. It stands between Stego- 

 cephalina Stephensen (1925) and Stegocephaloides Sars. It has the 

 bidig-itate processes of the lower lip, the partially expanded article 2 

 of pereopod 4 (that in Stegocephcdina is even broader), the simple 

 setae on the outer plate of maxilla 2, and the uniarticulate rami of 

 uropod 3 characteristic of StegocephaIma\ Init Stegocephaloides 

 hatdlia differs from Stegocephalina by the short, broad upper lip. 

 Stegocephaloides hatalia presumably differs from the type-species of 

 Stegocephaloides (mouthparts never figured) in the slightly expanded 

 article 2 of pereopod 4, the absence of hooks on the setae of the outer 

 plate of maxilla 2, their greater length, and the complex digitation of 

 the lower lip. 



The outer species of Stegocephaloides differ from S. camoti in the 

 strongly tapering, pointed, or nearly pointed posteroventral lobe of 

 article 2 on pereopod 5. 



Unknown Genus and Species 



Figure 74 



Description. — Body, antennae, and pleonal epimera with the aspect 

 of Andaniopsis nordJaiulica (Boeck) (see Sars, 1895, pi. 72, fig. 2) ; 

 accessory flagellum with small but not vestigial article 2 ; head with 

 lateral aspect of Andaniella pectinata Sars (1895, pi. 72, fig. 3) ; man- 

 dibles poorly dentate and resembling those of Andaniopsis ; maxilla 1 

 with the aspect of AndanieJIa, palp uniarticulate, much shorter than 

 that shown by Sars for AndanieUa; maxilla 2 resembling that of An- 

 daniella^ outer lobe, when completely flattened, probably as broad as 

 that shown by Sars but attached obliquely and appearing to be slender 

 on specimen at hand ; inner and outer plates of maxillipeds of the same 

 relative sizes as in Andaniopsis but inner plates not exceeding proximal 

 end of palp article 1 in resemblance of Andaniella^ outer plates much 

 smaller than those of AndanieUa, reaching only middle of palp article 

 2 ; maxillipedal palp resembling that of Atidaniopsis more than that of 

 Andaniella, having article 2 slightly longer than 1 ; gnathopod 1 re- 

 sembling that of Andaniopsis but shorter and having article 5 very 

 short; gnathopod 2 differing from that of either genus, with hand rela- 

 tively stout and short, having a false palm bearing two stout spines; 

 gnathopodal dactyls simple, like those of Andaniopsis but distinct from 

 spinose dactyls of AndanieUa; coxa 4 with symmetrical shape of 

 Andaniella,, not Andaniopsis; poreopods 1-4 differing from those of 

 both genera by their youthful turgidity; article 2 of pereopod 5 re- 

 sembling that of Andaniopsis with posterior lobe subacute but remain- 



