318 BULLETIN OF THE BUREAU OF FISHERIES. 



species; papular areas, though comparatively large, smaller than in the preceding specie?, because the 

 radial plates are relatively larger; a regular series of supermarginal plates, which are prominent ami 

 mark the boundary between abactinal and lateral faces of ray; between this and adambulacral series 

 4 longitudinal rows of regular plates, including an inferomarginal and M series of actinal intermediate 

 plates, the latter reduced to 2 series at about middle of ray, and to 1 on outer fourth; each marginal 

 and intermediate plate bearing a central, slender, sharp spine articulated to a boss, spines slenderer 

 and longer than the median radial series, ami forming regular transverse as well as longitudinal rows, 

 decreasing very slightly in size toward the furrow. General surface of all the plates beset with spaced 

 capillary spinelets of extreme delicacy, which are sheathed in pulpy membrane, so that in life they 

 appear robust, papilliform, and blunt; the larger spines likewise sheathed, but the membrane thinner; 

 abactinal surface with pedicellariae about as long as the spinelets, usually 1 to each papular area, form- 

 ing thus 2 longitudinal series between carina! and supermarginal plates; less numerous on the sides 

 of ray; papula' :! or 4 to the area, except below inferomarginals and near end of ray, where there are 

 usually but 1 or L'. 



Prominent adambulacral plates with a slight prominence into furrow; armature consisting of a 

 transverse series of 4 or ."i spinelets, the inner 2 standing well within the furrow, the innermost slightly 

 the shorter and hearing a bunch of 4 or 5 small pedieellari.'e; the outer 2 or 3 standing on the actinal 

 surface and graduated in size outward; the inner of these much longer than the second furrow spinelet 

 and very slender; the next slightly shorter, and the outermost similar to the delicate capillary spine- 

 lets of the intermediate plates. The alternate, uonprominent plates have a very small spinelet on the 

 furrow margin near the adoral border, and on the actual surface 2 spinelets in a transverse series, 

 the outer capillary, the inner very similar to the longest spinelet of the prominent plates. All the 

 spinelets invested in membrane. 



Madreporic body convex: situated near summit of interradial sulcus. 



Locality: Station 4400, between San Diego and San (Memento Island, 500 to 507 fms., green mud. 



This species is named for Dr. Barton Warren Kverniann, assistant in charge, Division of Scientific 

 Inquiry, 1 T . S. Bureau of Fisheries. 



Family BRISINGID^E G 0. Sars, 1875. 

 Genus BRISINGA Asbjcimsen. 

 Brieinga Asl.jornsen, Fauna Litt. Norvegiffi, andet It. fir. 1856, 95. (Brisinga endecacnenuis Asbj I, 

 Brisinga exilis, new species. 



Rays 10. R=250mm.; r=10 mm. R=25r. Breadth of disk, 20 mm.; thickness, 4 mm.; breadth 

 of ray at base, 5 mm.: at widest part of genital inflation, G mm. ( R varies to ISO mm.). 



Rays delicate, long, and slender, with a very attenuate, lash-like outer portion; costal ridges very 

 prominent, narrow, well spaced, 10 or 11 in number, extending a little less than \ length of ray; disk 

 small and thin, with a delicate abactinal membrane. 



Abactinal membrane of disk containing rather rudimentary, spaced, delicate plates which hear 2 to 5 

 short, sharp, delicate spinelets disposed in a row or irregular group, and covered with a delicate mem- 

 branous sheath; abactinal surface of disk low, not raised above level of rays; interradial plates small, 

 slightly keeled, narrow, the rays fragile, and the abactinal membrane thin and devoid of prickles; costal 

 ridges 0-11 in number, rather widely spaced, narrow, irregular, and prominent, composed of elongate 

 plates which imbricate by their ends; these plates, in the proximal portion of the genital area at least, 

 bearing 1 or 2 rather stout subcorneal prickles, and in life having each costal ridge overlaid by a 

 cushion of pedicellariie; ridges corresponding to about every other adambulacral plate, ami between 

 them, corresponding to the alternate plates, a transverse, prominent saccular band of pedicellarise, 



these continued throughout the ray, beyond the costal region, with about 1 to every adambulacral 

 plate; all prominent ami in alcoholic specimens difficull to distinguish from the costal ridges unless 

 one feels lor tin- plates of the latter. 



Adambulacral plates longer than wide and wider than high, with an excavated or concave furrow 

 margin, armature consisting of ilia very delicate furrow spinelet at adoral end of plate, surmounting 

 a slight boss and armed with a terminal pad of minute pedicellate; (2) on actinal surface., rather 



