﻿A NEW GENUS OF BRITTLEkSTAR — CLARK 453 



The oral surface is studded with hirge white ^I'anules reseinblin<^ 

 those on the aboral surface, but widely scattered. 



The second tentacle pore has a double arm spine. Farther out there 

 seem to be three arm spines arising from the same base. Distally these 

 become transformed into hooks. 



The genital openings, two in each interradius, are very large. 



The color is pinkish brown, the under surface and the large tubercles 

 yellowish white. 



r?/pe.— U.S.N.M. No. E. 7875, from off Triumph Reef, Elliott Key, 

 Fla.; 20-25 fathoms; collected by Frederick M. Bayer, November 

 28, 1949. 



A'otes. — Three additional specimens were collected at the same sta- 

 tion. The type and two others were on Swiftia exserta (Ellis and 

 Sohuider) and one was on Filigorgia, sp. 



The type and the specimen from Filigorgia are symmetrical with 

 seven rays each. The two others have two full-sized rays and two 

 much smaller, evidently the result of fission. 



For comparison with these specimens there are at hand four exam- 

 ples of the ophiocrenoid stage of one of the species of Gorgonocepha- 

 linae. These have five arms which divide once, in some cases with 

 the rudiments of a second forking at the tips of the secondary arms, 

 and the interradial areas of the disk are deeply concave. They were 

 dredged at Albatross station 3729, off Omai Zaki Light, Japan, in 

 34 fathoms and were clinging to MeUtodes^ sp. {/'nodosa). They re- 

 semble in general the specimens described by Matsumoto (Journ. 

 Coll. Sci., Tokj'o Imper. Univ., vol. 38, art. 2, pp. 68, 09, fig. 18, p. 69, 

 March 31, 1917) from Sagami Bay in 300 fathoms. 



With the four specimens from Albatross station 3729 were dredged 

 two specimens of Astrodadu-s do-fleim Doderlein (recorded by H. L. 

 Claik, U. S. Nat. Mus. Bull. 75, p. 293, 1911, as Astrophyton furdalis) 

 of which they are presumably the 3'oung. 



Matsumoto said that his ophiocrenoids may be young either of 

 Astroboa or Astrochalcis. They are from deeper water than the 

 maximum recorded for any of the five species of Astrocladus, all of 

 which occur in the sublittoral zone. 



While studying the specimens of Muricea collected by the Albatross 

 in the West Indies Mr. Bayer found a second species of Schizostella 

 which may be known as 



SCHIZOSTELLA BAYERI, new species 



Description. — Eesembling S. bifurcata and, like it, with seven 

 bifurcate arms ; but the white granules on the disk, instead of being 

 scattered, are contiguous and arranged in regular lines to form a con- 

 spicuous, white, close reticulation, while those on the arms are con- 



