i8g 



The ten arms are about 210 mm. long; the diameter of the animal at the level of the 

 seventh brachial is 22 mm., as against 19 mm. in C. robusta. 



A specimen of this species in the collection of the United States National Museum was 

 dredged at "Albatross" Stat. 5656, Gulf of Boni, in 871 Metres (Cat. N° 35702). 



2. Chondrometra robusta (A. H. Clark). 



A. H. CLARK. Proc. U.S. National Museum, vol. 39, 191 1, p. 558 (Chlorometra robusta). 

 Stat. 297. io°39S., i23°4o'E. Timor Sea. 520 Metres. 6 Ex. 



One of the specimens, with arms about 170 mm. long, very closely resembles the type; 

 it is very slightly smaller and more slender, and the median ornamentation of the arms is 

 slightly less pronounced, though of exactly the same character. 



Another is somewhat smaller than the preceding, with the dorsal ornamentation somewhat 

 less marked; the cirrus sockets are arranged in a single regular column in the centre of each 

 radial area, three, in one case four, to a column ; the surface of the 

 centrodorsal betvveen the columns of cirrus sockets is bare and flat. 



A very small specimen has the arms 75 mm. long; the centro- 

 dorsal, which exactly resembles that in the preceding except that the 

 interradial areas are slightly convex, appears unnaturally large ; the 

 radials are as large as the IBr^ deep subradial clefts are present; the 

 longest cirrus is 18 mm. long, compose/d of 17 segments the short apical 

 cirri are 7 mm. long with 1 1 segments, of which the third corresponds 



. . . Lateral view of the centvo- 



to the fourth in the larger cirri; the longer segments are proportionately dorsal of a spe cimen oi ciwn- 

 slightly longer than in the larger cirri, and there are only four short < / ™'"'"" "*«"*■ (Courtesy of 



ö } ° ö the U. S. National Museum). 



clistal segments instead of eight or nine ; the division series and arm 



bases are obscurely rounded carinate, resembling those of C. aculeata as figured by Carpenter 



("Challenger" Reports, Comatulae, pi. 23, fig. 3). 



Another very small specimen has the arms 55 mm. long, and the longest cirri 12 mm. 

 long, composed of 1 3 segments. 



AJ1 of the specimens from this station have the median brachial ornamentation very 

 slightly less accentuated than in the type. As in the type the centrodorsal is sharply conical, 

 and the cirrus sockets are arranged in two closely crowded converging rows which are confined 

 to the midradial region (Fig. 9). 



Fig. 9. 



Calyptometra A. H. Clark. 

 The only species in the genus Calyptometra is 

 1. Calyptometra lateralis (A. H. Clark). 



A. H. Clark. Proc. U. S. National Museum, vol. 34, 1908, p. 226 [Charitometra lateralis). 



