2I 5 



long- with ii segments; P 4 longer than P, and P, , 4 mm. long with [3 



segments (Maclagascar and Mauritius; littor al) matiritiana 



c' 2 P„ with 13 segments, 8 mm. long, less slender; P l and P n equal, 4.5 mm. 

 long with 10 segments; P 4 shorter than P x and P 3 , 3 mm. long with 



10 segments (Binongka; 54 Me tres) gracilis 



\r cirrus segments much elongated, with much expanded distal ends; arms 

 from 23 mm. to 30 mm. long 



c 1 P 3 more than twice as long as F l and P g with much more numerous 

 segments, 7 mm. long with 16 segments; P 1 and P 3 2.5 mm. long with 

 8 — 9 segments; cirri XXX — XL, 10 — 12 (Maldive Is la n ds to 

 northern Australia, the Tonga Islands, the Philip pi nes and 



the Macclesfield Bank: o — 74 Met r es) na na 



c 3 P g not greatly longer than V l and P 2 , 2.9 mm. long with 9 segments; 

 P x and P 3 2.5 mm. long with 7 segments; cirri XX, 12 — 14 (Korean 



Straits; 106 Me tres) briseis 



a 2 P 2 intermediate in size and in number of segments between P x and P.. 



b 1 cirri not especially slender, the longest segments not more than about 

 twice as long as the diameter of the expanded ends 



c 1 Pj 3.2 mm. to 4 mm. long with 10 — 15 segments; P 2 6 mm. long with 

 13 — 14 or more segments; P., 9 mm. to 10 mm. long with 17 — 19 

 segments; P^ 4.5 mm. long, or longer, with 13 segments; P. 4.5 mm. 

 long with 12 segments; cirri XXXV — XL, 10 — 15; arms 50 mm. to 



60 mm. long (Philip pi 11e Islands; o — 32 Metres) parvicirra 



c" Pj 5 mm. long with 8 segments; P 2 9.5 mm. with 12 segments; P., 

 13 mm. long with 18 — 20 segments; P 4 4.5 mm. to 5 mm. long; P. 

 slightly longer; cirri XXV, 14 — 16 (usually 15 — 16), 13 mm. long; arms 



about 40 mm. long (S u ez B a y ; 1 8 Metres) aegyptica 



\y cirri excessively slender and delicate, the earlier segments about four times 

 as long as the diameter of the expanded ends, the penultimate twice as 

 long as broad; cirri with 11 — 12 segments, 9 mm. long; P l 2 mm. long 

 with 8 segments; P., 3.5 mm. long with 8 — 9 segments; P., 4.5 mm. long 

 with 9 segments; arms 40 mm. long (Moluccas; 95 Metres). . . . clymene 



1. Dorometra gracilis (A. H. Clark). 



A. H. Clark. Notes from the Leyden Museum, vol. 34, 19.12, p. 138 [Iridometra gracilis). 

 Stat. 220. Anchorage off Pasir Pandjang, western coast of Binongka. 54 Metres. 1 Ex. 



The cirri are 7 mm. long, composed of 10 segments of which the third and fourth are 

 the longest, two and one half times as long as the diameter of the greatly expanded distal 

 ends, ancl the antepenultimate is one third again as long as broad. 



The arms, which resemble those of the other species of the genus, are 35 mm. long. 



