NO. 3576 AMPELISCIDAE — BARNARD 13 



The distinct rostrum of B. albatrossae prompts comparison with 

 Haploops securiger K. H. Barnard (1932) which I transfer to Byhlis. 

 That species also has a distinct but much longer rostrum, and its 

 ventral pair of corneal lenses is situated beneath the head and con- 

 cealed from lateral view. 



Distribution: Honshu Island, Japan, 280-329 m. 



Byblis ampelisciformis, new species 



Figure 3 



Diagnosis of male: Rostrum vestigial, anterior cephalic margin 

 lacking protrusion, anteroventral cephalic margin sinuously excavate 

 for reception of antenna 2, strongly oblique; two pairs of corneal 

 lenses of medium and subequal size, ventral pair situated at and 

 forming rounded anteroventral angle, pointing anterolaterally; 

 antenna 2 as long as body, antenna 1 reaching nearly three-foiu-ths 

 along full length of antenna 2, article 2 of peduncle 2.5 times as long 

 as article 1 and nearly as long as article 4 of peduncle on antenna 2; 

 anterior coxae serrate ventraUy, coxa 4 of medium width, slightly 

 truncate ventrally, posterior tooth of medium size; pereopods 1-2 

 scarcely disproportionate in size, dactyls slightly longer than their 

 respective sixth articles; pereopods 3-4 without special modifications; 

 article 2 of pereopod 5 with typical overall shape, article 6 about 67 

 percent as long as article 5, article 7 about 40 percent as long as 

 article 6; uropods 1 and 2 of normal proportions, distolateral end of 

 uropod 1 peduncle with stout spine, of uropod 2 with hooked cusp, 

 spines of peduncles and rami remarkably short and stout; rami of 

 uropod 3 furciform, short, asetose, medial margin of inner ramus 

 lined with short spines, ventromedial margin of outer ramus bearing 

 several scales, typical serrations absent; telson short, very broad, 

 cleft halfway; urosome slightly miniaturized in comparison to other 

 species of genus. 



Remarks: Mouthparts are similar to those of Byblis gaimardi 

 (Kr0yer) (in Sars, 1895, pi. 64), but the outer plate of maxiUa 2 is 

 expanded distally very slightly and article 2 of the mandibular palp 

 is asymmetrically expanded. Pleonal epimera are rounded posteriorly 

 and resemble those of B. crassicornis Metzger {in Sars, 1895, pi. 66). 

 The medial surface of article 2 of pereopod 5 is densely setose. 



Female: Similar to male. 



Holotype: USNM 111271, male, 12.0 mm. 



Type locality: Albatross 3708, Ose Zaki, off Honshu Island, Japan, 

 60-70 fms, May 8, 1900. 



Material: Albatross 3708 (3), 3716 (1). 



Records: Ose Zaki, Honshu Island, Japan, 70-125 fms. 



Relationship: This species resembles B. veleronis J. L. Barnard, 



