14 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 121 



1 seta) instead of 4, as in Sars' figure (pi. 82, m). The maxUliped 

 is 4-segmented, the last segment ornamented with a small fanlike 

 fringe, instead of being 3-segmented as in Sars' figure (pi. 82, mp^). 

 The armature of the last segment of the endopod of leg 1 is 1,3 

 instead of 1,11,3 as in Sars' species. The free segment of leg 5 is 

 expanded instead of being narrow as in H. jurcijer. The caudal 

 ramus is only 3 times longer than wide instead of about 13:1 as in 

 the Norwegian species. The length of the female is 1.13 mm, 

 instead of 1 .40 mm as in H. jurcijer. 



Hippomolgus cognatuSf new species 



Figures 59-69 



Type MATERiAL.^Holotype 9 (USNM 113397) from a colony of 

 Tubipora musica (Linnaeus), in 1 m, Pte. Ambarionaomby, Nosy 

 Komba, near Nosy Be, Madagascar, collected Mar. 31, 1964, 

 deposited in the United States National Musemn. 



Other material. — 2 99 from Tubipora musica, in 1 m, Pte. a la 

 Fievre, Nosy Be, Jan. 5, 1964, 1 9 (USNM 113398) in the United 

 States National Museum, the other (dissected) in the private collection 

 of A. G. Hmnes. 



Female.^ — Body (fig. 59) resembling that of H. latipes. Length 

 (not including setae on caudal rami) 0.90 mm (0.82-0.95 imn) and 

 greatest width 0.29 mm (0.28-0.31 mm), based on 3 specimens. 

 Ratio of length to width of prosome 1.56:1. 



Segment of leg 5 broad, 78m x 188)u. Genital segment (fig. 60) 

 only slightly wider than long, 120^ in length, 132ju wide in its an- 

 terior half, and 110m ^vide in its posterior half, where sides in dorsal 

 view are nearly parallel. Areas of attachment of egg sacs located 

 dorsolaterally on midregion of segment. Each area (fig. 61) with 

 a slender naked seta 22/x long, a spine 8jLt long, and 2 spinous proc- 

 esses. Three postgenital segments 66/x x 101m, 60m x 91m, and 80m x 82m, 

 respectively, from anterior to posterior. 



Caudal ramus (fig. 62) 64m x 31m in greatest dimensions, or 3 times 

 longer than wide. Outer lateral seta 25m, outermost terminal seta 

 39m, innermost terminal seta 88m, 2 long terminal setae 220m (outer) 

 and 450m (inner), dorsal seta 33m long. 



Ratio of prosome to m"osome 1.17:1. 



In single ovigerous female collected egg sac (fig. 63) 352m x 138m, 

 reaching nearly to ends of caudal rami, with each egg about 47m 

 in diameter. 



Rostral area (fig. 64) bearing 2 rows of minute denticles. 



First and second antennae like those in H. latipes. Labrum (figs. 

 65, 66) ornamented as indicated in figures. Mandible (fig. 67) bearing 

 3 terminal elements as in H. latipes, but these with different orna- 



