195 



2 mm. in diameter; the cirrus sockets are arranged in one and a partial second irregular 

 closely crowded row. 



The cirri are XVII, 11 — 12 (usually 11), 8 mm. to 11 mm. long, slender, vvith elongated 

 segments; the first segment is very short, dorsally expanded into a rounded knob-like process : 

 the second is not quite so long as broad; the third is twice as long as the median diameter; 

 the fourth and fifth are nearly three times as long as the median diameter; the remainder are 

 very slightly shorter, becoming a trirle longer again, about two and one half times as long as 

 broad, on the antepenultimate and penultimate ; the penultimate segment is of lesser diameter, 

 in lateral view, than those preceding; the third and following are moderately constricted cen- 

 trally with prominent distal ends, this feature decreasing distally; the segments carry no dorsal 

 spines or other processes; the opposing spine is prominent, terminal, directed obliquely forward," 

 its proximal profile convex, its distal concave, its base occupying only slightly more than one 

 third of the dorsal surface of the penultimate segment; the terminal claw is about as long as 

 the penultimate segment, moderately stout, and moderately and evenly curved. 



The ends of the basal rays are small but prominent tubercles in the angles of the calix. 



The radials are entirely concealed by the centrodorsal. 



The IBrj are short, about four times as broad as long in the median line; the proximal 

 border is slightly produced, slightly convex but usually becoming straight in the lateral quarters ; 

 the lateral edges are in close apposition with those of their neighbors, and are widely divergent, 

 and produced and everted as in Calyptomctra lateralis\ the distal edge is sometimes obscurely 

 scalloped in the lateral thirds, the median third being slightly excavated for the reception of 

 a rounded posterior process from the axillary. 



The IBr, (axillaries) are exceedingly short, about two and one half times as broad as 

 long; their lateral edges resemble those of the IBi-j, but are only about half as long. 



The 10 arms are 40 mm. long. The first brachials are in close apposition both internally 

 and externally with their neighbors; their proximal and distal borders are parallel; their proximal 

 borders are slightly everted; their outer borders are produced and everted like the outer 

 borders of the preceding ossicles; the inner borders are similarly everted, but not so much so; 

 the synarthrial tubercles, though small and well rounded, are rather prominent. The second 

 brachials are similar to the first, but about twice as long externally as internally. The first 

 syzygial pair (composed of the third and fourth brachials) is roughly oblong, about two and 

 one half times as broad as long, with the lateral edges modified as in the preceding; the next 

 three brachials are wedge-shapecl, about twice as broacl as the maximum length, the dorsal 

 surface usually concave and the distal edge therefore prominent; after the tenth the brachials 

 become triangular, about as long as broad, later very obliquely wedge-shaped, and toward the 

 ends of the arms twice as long as broad. Beyond the second syzygy the brachials have slightly 

 produced and very finely spinous distal ends. 



Pj is very slender and delicate, 6 mm. long with 35 segments of which the seventh or 

 eighth and following are about as long as broad ; except for the absence of the expansion of 

 the first two segments it resembles P x in Calomctra. P 2 is 6 mm. long with 1 8 segments of 

 which the sixth-eleventh are greatly produced ventrallv, forming a roof over the genital glands, 



