466 BULLETIN 82, UNITED STATES NATIONAL MUSEUM VOLUME 1 



The following pinnules gradually become longer, the distal being 12 mm. long with 

 about 24 segments, of which the first is short and trapezoidal, the second short, about 

 as long as broad, and those succeeding become progressively elongated. The lower 

 pinnules are somewhat stiffened, and the distal, while long, are not especially slender. 



Notes. Dr. Torsten Gislen (1922) described two small specimens of this species. 



In one the cirri are XX, the peripheral with 34-36, the apical with 24-25 segments, 

 from 7 to 11 mm. in length. The first and second segments are short, the third is 

 about as long as broad, the fifth is the longest, from a half to two-thirds again as long 

 as broad, and the following slowly decrease in length so that the tenth is about as 

 long as broad. From the tenth segment onward a dorsal swelling appears on each 

 cirral distally which gradually develops into a blunt longitudinal crest, most prominent 

 on the ninth or tenth segments from the end of the cirri. The antepenultimate seg- 

 ment is almost smooth. The opposing spine is stout, reaching two-thirds of the width 

 of the penultimate segment in height. The terminal claw is about as long as the 

 penultimate segment, and curved. 



The radials are 6 times as broad as long. The IBr! are twice as broad as long, 

 almost free laterally, distally somewhat incised in the middle by the posterior extension 

 of the axillary. The synarthrial elevation is inconspicuous. The axillaries are rhombic, 

 one quarter again as broad as long; the lateral angles are provided with very slight 

 small spines. 



The 10 arms are 25+ mm. long. The first brachials are half again as long ex- 

 teriorly as interiorly, and are interiorly united. The proximal border of the second 

 brachials is similar to that of the axillaries. The brachials after the tenth are tri- 

 angular and smooth. 



Syzygies occur between brachials 3+4, (9 + 10), 15 + 16, and 21+22, and distally 

 at intervals of usually 3 or 4 muscular articulations. 



P! is 4.2 mm. long, composed of 11 to 12 segments, of which the first and last 

 are short and the others are from two to two and a half times as long as broad. P s 

 is usually absent. P 2 is 4 mm. long with 11 segments, of which the distal are slightly 

 swollen and spiny. P 3 is 2.2 mm. long with 8 to 9 segments. P 4 is a little shorter, 

 and the following pinnules become longer again. The distal pinnules are 3 mm. 

 long with about 13 segments, of which the first and second are somewhat stouter 

 than those following. 



In the second specimen the bare dorsal pole of the centrodorsal is finely granular, 

 0.8 mm. in diameter. 



The cirri are XIV, 17-19, arranged in a single row. The fourth segment is the 

 longest and bears a dorsal tubercle which on the seventh passes over into a stout 

 dorsal spine which becomes less developed on the antepenultimate. 



The 10 arms are all broken. The distal intersyzygial interval is 3 to 4 mus- 

 cular articulations. 



PI is 3 mm. long with 11 segments. P a is absent. P 2 is 4.2 mm. long with 11 

 segments which have small spines on their distal borders. P 3 is 3 mm. long with 9 

 segments. P 4 is 2 mm. long with 10 segments. 



The 2 specimens dredged in Sagarni Bay by Dr. Haberer were both small, with 

 the synarthrial tubercles just beginning to develop. P a is present on all the arms. 



In 1927 Gislen gave notes on two specimens collected by Dr. Th. Mortensen 

 off Kiu-Shiu. One has the centrodorsal 1.3 mm. high; cirri XXIV, with 27-34 seg- 



