195 
2 mm. in diameter; the cirrus sockets are arranged in one and a partial seccjnd irregular 
closely crowded row. 
The cirri arc X\'1I, ii — 12 (usually 11), 8 mm. to 11 mm. long, slender, with elongated 
segments; the first segment is very short, dorsallv expanded into a rounded knob-like jjrocess ; 
the second is not ([uite 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 
verv slightK- shorter, becoming a trille longer again, about two and one half times as long as 
broad, on the antepeiiultiniate ami penultimate ; the penultimate segment is of lesser diameter, 
in lateral view, than those preceding; the third and following are moderately constricted cen- 
trallv wiiii 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 p'rofile 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 IBtj 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 Calyptovtetra 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 I Br, (axillaries) are exceedingly short, about two and one half times as broad as 
long; their lateral edges resemble those of the IBr^, 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 tirst, but about twice as long externally as internally. The first 
syzygial pair (composed of the third and fourth bracliials) 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-shaped, about twice as broad 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. 
P, 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 ot 
the first two segments it resembles Pj in Calometra. P., is 6 mm. long with 18 segments ot 
which the sixth-eleventh are greatly produced ventrally, forming a roof over the genital glands, 
