226 Bulletin Vanderbilt Marine Museum, Vol. VI 



mum widths below the center and thence narrow to an acute apex; 

 the inner side of each blade being the more convex. The outer 

 blade is the wider and has the inner margin denticulate ; the inner 

 blade has both margins denticulate distally. 



References: Brachyscelus cru^culum, Bate, C. S., Ann. and 

 Mag. Nat. Hist., ser. 3, vol. VIII, 1861, p. 7, pi. 2, figs. 1, 2; 

 Brit. Mus. Nat. Hist. Catal. Amph. Crust., 1862, p. 333, pi. 

 53, figs. 2, 3.— Stebbing, T. R. R., Rept. Voy. H. M. S. "Chal- 

 lenger," Zool., vol. XIX, pt. 2, 1900, p. 1544, pi. 195.— 

 Chevreux, Ed., Res. Camp. Sci. Prince de Monaco, Fasc. XVI, 

 Amphipodes, 1900, p. 153. 



Thamyris crusculum, Bovallius, C, Syst. List. Amphip. Hyper., 

 Bihang till K. Svensk. Vetensk.-Akad. Handl., Bd. XI, art. no. 

 16, 1887, p. 31. 



Brachyscelus stebbingi, new species 



Plates 67 and 68 



Type : One specimen, taken off Fuerte Ventura, Canary Islands, 

 Puerto Cabras, bearing 270 true 7 miles distant, depth 250 fathoms, 

 by the yacht "Alva." 



Distribution : Known only from the type. 



Technical description : Head: Typically large, smooth, con- 

 vex, but differing from B. crusculum Bate, in that the present 

 species lacks the median frontal lobe or "angle," the median dorsal 

 strip that separates the eyes is anteriorly truncated, the strip 

 bifurcating, forming a A-like narrower margin to the excavate 

 mouth region. (See pi. 68, fig. B). The entire dorsal half of the 

 head is smooth, the eyes being restricted to the lower six-tenths 

 of each side and well separated dorsally by a median strip which 

 bifurcates anteriorly, A-like, forming the upper margin to the 

 truncate frontal region. Height of head, 3.5 mm., across the 

 posterior margin ; depth, taken across the upper border of eye, 

 2.5 mm. ; width of median strip between the eyes 0.7 mm. The 

 dorsal margin of the eye is almost straight, very faintly sinuate 

 in the median region and curved downward at the postlateral 

 angle, the lower frontal margins being evenly, widely convex and 

 nearly contiguous with the margin of the head. 



