626 BULLETIN 82, UNITED STATES NATIONAL MUSEUM VOLUME 1 



A third specimen has the radials very much bigger than in the last; the corners 

 of the basals are cut away to receive them. The right posterior radial is very asym- 

 metrical, being undeveloped on the left side, where the much smaller radianal plate 

 is present. Each of the radials except the right posterior bears a small IBr, and a 

 smaller axillary; they lie in the furrow between the strongly turned-out lateral edges 

 of the oral plates but are massive enough to project beyond the edges of them in profile. 

 The right posterior radial bears no ossicles. 



In the fifth specimen the radials and division series are relatively larger and the 

 axillary bears the two first brachials, though these are still very small. 



The eighth specimen has the crown 1.4 mm. long and column 7.7 mm. There are 

 31 columnals, of which the middle ones are longer than broad and have nearly lost the 

 encircling girdle. The sides of the basiradial cup are nearly straight. The radials 

 almost meet in the interradii except the posterior one, where the radianal separates them. 

 The anterior arms are of four brachials and curl in over the orals. 



In the tenth specimen, with the crown 3.2 mm. long, the proximal corners of the 

 posterior radials meet, cutting off the radianal plate from contact with the basal. The 

 other radials all meet broadly. There are 12 or 13 brachials present. 



The twelfth specimen has the crown 5.6 mm. long. The first columnal is short 

 and as wide as the basal cup to which it is closely attached. It bears the beginnings 

 of five radially situated cirri, with about three to five segments. The radials are longer 

 than the basals and are in broad and complete lateral contact. The oral plates are 

 hard to distinguish between the arms, which are of about 20 brachials with pinnules 

 of up to 8 segments from the ninth brachial onwards. There are a few sacculi and 

 there appear to be small side plates along the arm ambulacra. 



In the fourteenth specimen, with the crown 6.8 mm., there are two alternating 

 whorls of cirri, the interradial ones being very small and arising from the proximal half 

 of the first columnal. 



The fifteenth specimen has the crown about 11 mm. long. There are three whorls 

 of cirri, of which the longest have 27 segments. The basal plates are very reduced. 

 The pinnules beyond the tenth brachial have 12 or more segments and PI is beginning to 

 appear on the second brachials. 



Localities. Discovery Investigations station 170; off Cape Bowles, Clarence 

 Island (lat. 6125'30" S., long. 5346' W.) ; 342 meters; at 335 meters, temperature 

 0.42 C., salinity 34.47/ 00 ; rock; February 23, 1927 [John, 1938] (3 adults, 15 

 pentacrinoid larvae, B.M.). 



Discovery Investigations station 1873; off Cape Bowles, Clarence Island (lat. 

 6121' S., long. 5404' W.) ; 117 meters; rock and stones; November 13, 1936 [John, 

 1938] (1,B.M.). 



Discovery Investigations station 1948; east of Clarence Island Gat. 6049' S., long. 

 52 40' W.) ; 490-610 meters; January 4, 1937 [John, 1938] (4, B.M.). 



Discovery Investigations station 1955; north of the South Shetland Islands (lat. 

 6135' S., long. 5723' W.); 410-440 meters; January 29, 1937 [John, 1938] (4, B.M.). 



All the above specimens are syntypes. The type locality can therefore be taken as 

 the Clarence Island-South Shetland area, about 60^-6 \}{ S. and 52-57^ W. 



Geographical range. Off Clarence Island and the South Shetlands. 



Bathymetrical range. -From 117 to 490 (?610) meters. 



