550 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.39. 



form a sort of gable, which leans somewhat inward, with serrate 

 sides, and a blunt tubercle at the apex; but the dorsal surface of the 

 segments does not become generally carinate, as is usually the case. 



Ends of the basal rays visible or prominent, though small, tubercles 

 in the angles of the calyx; radials just visible beyond the edge of the 

 centrodorsal, more or less covered with fine spines and with a finely 

 serrate distal border; IBr^ very short, about four times as broad as 

 long, convex proximally, concave distally; IBrj rhombic with the 

 sides concave, twice as broad as long, the lateral edges shorter than 

 those of the IBrj ; elements of the IBr series and first two brachials 

 with somewhat everted, finely spinous edges, sometimes with scat- 

 tered fine spines on the dorsal surface and a thick development of 

 fine spines along the lateral margins, which are somewhat produced. 



Ten arms 130 mm. long; first brachial short, twice as broad as long 

 exteriorly, incised somewhat on its distal margin; the synarthrial 

 tubercles are moderately prominent, broadly rounded; second 

 brachial larger, with a rounded posterior process incising the first; 

 third and fourth brachials (syzygial pair) one-third to one-half again 

 as broad as long, oblong; next four brachials oblong, about two and 

 one-half times as broad as long, the following becoming obliquely 

 wedge-shaped and then triangular, as long as broad, and wedge- 

 shaped again distally; the earlier brachials with everted and finely 

 spinous distal ends; fourth and following with the dorsal (but not the 

 lateral) surface thickly covered with fine spines, which on the outer 

 brachials become somewhat coarser and are directed anteriorly; 

 proximally as the brachials become wedge shaped the distal edge 

 begins to overlap and the proximal to lose its eversion so that the 

 later brachials assume strongly produced and very spinous distal ends. 



In C. ewpedata the second and following brachials are thickly cov- 

 ered with minute spines, but they are evenly distributed over the 

 entire exposed surface, lateral as well as dorsal, and they are neither 

 so large nor so long as in this species. 



The color is yellow, 



T^2>^.— Cat. No. 27498, U.S.N.M., from station 5424, 



A second similar specimen was secured at this station. 



Station 5274- — One specimen, somewhat larger than the two pre- 

 ceding, the arms being about 150 mm. in length. 



Station 5445- — One specimen, resembling the type. 



CROTALOMETRA INFELIX, new species. 



Centrodorsal low-conical, with the apex abruptly prolonged ; cirrus 

 sockets in ten closely crowded columns. 



Cirri XX, 38-44, 25 mm. to 30 mm. long; first segment short, 

 the following gradually increasing in length, becoming about as 

 long as broad on the fifth and half again as long as broad on the 

 seventh; following segments gradually decreasing in length becom- 



i 



