NO. 1543. TWO NEW CRINOIDS FROM NORTH PACIFIC— CLARK. 



511 



of B. pacificus was taken in 905 fathoms, 145 fathoms less than the 

 previous record. 



The individual described was taken on August 81, 190G, at U. S. 

 Fisheries steamer Albatross station No. 

 4974, in 33^ 18' 10" north latitude, 135^ 

 40' 50" east longitude, Shio Misaki light, 

 south coast of Nipon, Japan, bearing N. 

 25° E., 8.7 miles distant, being within a 

 few miles of the locality where, on the 

 previous da}", the remarkable Phri/nocrinus 

 findu.s was secured. The depth was 905 

 fathoms, the bottom brown and green 

 mud, with numerous foraminifera, and 

 the bottom temperature 36.6° F. (cor- 

 rected). 



Basals united into a smooth ring, slightly 

 wider above than below, where it is of the 

 same diameter as the upper stem joints; on 

 its upper surface rests the funnel-shaped cup 

 composed of the united radials, resembling 

 most nearly that of S. aldrlchlanus, but 

 when viewed from the side more regularly 

 trapezoidal (the short sides of the trapezoid 

 with no trace of constriction) and when 

 viewed from below less scalloped and more 

 rounded, with the sutural lines less depressed. 

 The radial cup is slightly less in height than 

 the second radial, but slightly more than the 

 third (axillary). In B. aldrichlanus and B. 

 (Yaujjhell/'anus, the nearest related species, it 

 is slightly less than either. The second and 

 third radials are trapezoidal in form, widen- 

 ing from below upward, about as in B. 

 camphellianus; a low rounded ridge extends 

 down their median line, bifurcating just 

 before the axillary joint, but is much les.s 

 marked than in the other species. The sharp 

 edges of the axillaries are continued for 3 or 

 4 joints onto the brachials, after which the 

 brachials become more cylindrical in form. 

 The two lowest are approximately square, 

 but from the third on they are rather longer than wide. The first 

 pinnule is usually on the eighth brachial. The arms, and pinnules are 

 essentially as in B. campljeU!a)i>is. (See fig. 2.) 

 Proc. N. M. vol. xxxii— 07 33 



Fig. 2. — B.\THYCRiNrs p.^riPicus. 

 Crown and root. Three times 



N.iTURAL SIZE. 



