,gO BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



as long as broad. The foUowing pinnules are mostly broken. The genital pinnules 

 have about 12 segments of which the third and fourth are very much expanded. 



The color in alcohol is white, the disk browai and studded with calcareous plates. 



Professor Gisl^n said he was in much doubt whether the specimens he described 

 were really referable to sclateri. He noted that the three smaller specimens were 

 from one of the stations from which Dr. H. L. Clark got his young specunens. The 

 specimen from Mortensen's station 25 is a little larger, the keel on the dorsal side of 

 the cirrus segments is somewhat more disthict, and the lateral sculpture of the arm 

 bases is a little more obvious, but the general appearance and the spacing of the syzy- 

 gies is the same. However, he said, the specimen is still 10-armed and the ossicles of 

 the division series are much longei (a featm-e which may of course be an indication of 

 youth) than in the specimen figm-ed by Bell. He remarked that, in fact, the genital 

 pinnules are closely reminescent of Charitometra. Provided that it is not a young of 

 Pachylometra sclateri, it is a new species which may probably be most correctly ranged 

 within the 10-armed genus Charitometra. 



In revising the family Charitometridae I noted Dr. Clark's remark that Pi is 

 stiff and erect with only 7 segments; Gislen's description of Pi in which he said that 

 the longest segments are half again as long as broad ; and the fact that neither men- 

 tioned side or covering plates, which are highly developed and conspicuous in the 

 young of all the species of Charitometridae. Gisl6n figured the genital pinnules, 

 showing the greatly broadened third and fourth segments, but no plating of the brach- 

 ial ambulacra or perisome. The stiff pinnules at the base of the arm composed of few 

 long segments combined with the expanded third and fourth segments of the genital 

 pinnules and the absence of side and covering plates made it evident that these speci- 

 mens could not belong to any of the species of Charitometridae, but strongly suggested 

 the genera Austrometra and Anakidometra of the Colobometridae. Dr. H. L. Clark 

 was so very good as to send me a specimen for examination, and I found my supposition 

 confirmed. 



On referring to my personal notes I find that I was in Cambridge when Dr. Clark 

 was working on the South African collection, and furthermore that I had acquiesced in 

 the identification of these little specimens as the young of Pachylometra sclateri. I am 

 therefore quite as much to blame as they for the confusion that has resulted. 



Localities. — Pieter Faure No. 12884; East London, Cape Colony, bearing N. 15 

 miles distant; 567 meters; mud [H. L. Clark, 1923; Gisl6n, 1938]. 



Pieter Faure No. 13227; Cove Rock, near East London, bearing N. W. 3/4 W., 13 

 miles distant; 146-238 meters; coral rock [H. L. Clark, 1923; Gisl6n, 1938] (4, M. C. Z., 

 737 [type], 752). 



Dr. Th. Mortensen's station 25; off Durban, Natal; 411 meters;sandy mud; Aug- 

 ust 26, 1929 [Gisl^n, 1938]. 



Geographical range. — Coast of southeastern Africa from East London, Cape Colony, 

 northward to Durban, Natal. 



Bathymetrical range.— From 238 (?146) to 567 meters. 



History. — The first known specimens of this species, one from Pieter Faure No. 

 12884 and thirteen from Pieter Faure No. 13227, were recorded by Dr. Hubert Lyman 

 Clark in 1923 as young individuals of Pachylometra sclateri, and a few notes on them 

 were given. 



