12 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 121 



article 4 of antenna 2 longer than peduncle of antenna 1 and much 

 longer than article 5 of antenna 2, fiagellum 4 times as long as article 

 5 of peduncle; anterior coxae unserrate ventrally, shallow, pointing 

 very strongly anteroventrad, coxae 3 and 4 progressively more trun- 

 cated ventrally, coxa 4 with long, flat ventral margin and narrow 

 posterior tooth; pereopods 1-2 scarcely disproportionate in size, 

 dactyls slightly longer or subequal in length to their respective sLxth 

 articles, pereopod 2 more strongly setose than pereopod 1 ; pereopods 

 3-4 without special modifications, posterior bilobation of article 2 

 on pereopod 3 especially symmetrical for genus; article 2 of pereopod 

 5 with typical overall shape but ventral margin evenly rounded, 

 article 6 about 80 percent as long as article 5, article 7 slightly more 

 than half as long as article 6; uropod 1 extending to end of uropod 2 

 but with disproportionately short peduncle and long rami, distolateral 

 apex of peduncle with long, slender spine, outer ramus longer than 

 inner and lacking spines, inner ramus with basal ridge for locking 

 outer ramus; uropod 2 with hooked distolateral cusp on peduncle, 

 outer ramus with more than twice as many marginal spines as inner 

 ramus; uropod 3 typically forcipiform, apposing margins of rami 

 strongly serrate; telson of medium length, cleft about one-thkd. 



Remarks: Pleonal epimera are similar to those of Byblis affinis (in 

 Sars, 1895, pi. 65). Mouthparts are sunilar to those of B. gaimardi 

 (in Sars, 1895, pi. 65), but article 2 of the mandibular palp is expanded 

 proximally in asymmetrical fashion, each inner plate of the maxillipeds 

 has 2 spine-teeth, and the outer plate of maxilla 2 is slightly broader 

 and distally expanded. 



Male: Two specimens, 15 and 13 mm long, have article 5 of antenna 

 2 nearly as long as article 4, and antenna 1 is equal to or exceeds the 

 peduncle of antenna 2 by the length of 2 flagellar articles. 



Holotype: USNM 111268, female, 15.0 mm. 



Type locality: Albatross 3738, entrance to Port Heda, off Honshu 

 Island, Japan, 167 fms, May 17, 1900. 



Material: Albatross 3698 (3), 3738 (3). 



Records: Manazuru Zaki and Port Heda, Honshu Island, Japan, 

 153-167 fms. 



Relationship: In some ways this species resembles B. veleronis 

 J. L. Barnard (1954a), but the disproportionate corneal lenses, the 

 angular protrusion on the anterior margin of the head, and the shape 

 of coxa 4 distinguish B. albatrossae. The shape of the anterior 4 pairs 

 of coxae and the first antennal length relate this species to one being 

 described by M. Imbach from Viet Nam, but numerous other char- 

 acters of that species distinguish it: serrate anterior coxae, equal 

 ocular lenses, straight anterior cephalic margin, more deeply cleft 

 telson, and the form of article 2 on pereopod 3, 



