2ÓI 



segments (except the basal) greatly elongated; terminal claw minute, conical 

 c 1 disk completely covered with small calcareous granules (New Zealand 



and New South Wales to the East Indies) semperi 



c" disk naked (southern Japan to Celebes and the Paternoster 



I s 1 a n d s) japonicus 



b" cirri of medium length or short, more or less recurved throughout their 

 entire length, composed of 14 — 17 segments; terminal claw recurved 

 and hook-like 

 c 1 articular tubercles very strongly developed, giving the arms a very 



rugged appearance (sou thern Japan) iuberculatus 



c 3 articular tubercles not developed, so that the arms appear smooth 



d 1 disk naked (southern Japan to the Philippines) diomedeae 



d : disk completely covered with small calcareous granules (north- 



w es tem Africa to western Ireland; Caribbean Sea). . atlanticus 



1. Pentametrocrinus diomedeae A. H. Clark. 



A. H. CLARK. Smithsonian Miscellaneous Collections (Quarterly Issue), vol. 52, part 2, p. 234. 

 Stat. 95. 7°43'.5 N., H9°4o'E. Sulu Archipelago. 522 Metres. 5 Ex. 



The best preserved specimen has the cirri 27 mm. long with 17 — 18 (usually 18) 

 segments. It agrees well with a specimen from "Albatross" Station 5173 (between Mindoro 

 and Luzon, Philippine Islands) which has the cirri 22 mm. long, composed of 14 — 16 segments, 

 which are of the same relative proportions as those of the individual under consideration, but 

 is somewhat smaller. The difference in size probably accounts for the difference in the length 

 of the cirri and in the number of the segments. The type of P . diomedeae, from southwestern 

 Japan, has 14 — 17 cirrus segments. 



Of the other specimens one resembles the one just noticed, and the other three are 

 small. One of the latter has the cirri 15 mm. long, composed of 14 — 15 segments. 



2. Pentametrocrinus japonicus (P. H. Carpenter). 



P. H. Carpenter. Journ. Linn. Soc. (Zool.), vol. 16, 1882, p. 499 [Eudiocrinus japonicus). 

 "Challenger" Reports. The Comatulae, p. 84, pi. 7, figs. 1, 2 {Eudiocrinus japonicus). 



Stat. 38. 7°35'.4S., ii7°28'.6E. Flores Sea. 521 Metres. 1 Ex. 

 Stat. 74. 5 3.5 S., u 9 o' E. Makassar Straits. 450 Metres. 1 Ex. 



The specimen from Stat. 38 is typical, agreeing well with the type in London and with 

 numerous specimens from southern Japan in the United States National Museum. lts cirri are 

 35 mm. long, composed of 26 segments. 



The individual from Stat. 74 has the cirri 50 mm. long, composed of 35 segments-, it 

 is slightly la.rger than the preceding, nearly as large as the largest "Albatross" specimen from 

 southern Japan. 



