CUMACEA. 1(55 



its length. Lateral cormia less prominent, directed forwards. Antero-lateral margins 

 between pseudorostrum and lateral cornua simply convex with hardly an indication 

 of the antero-lateral tooth. The lateral keel is well marked, as is also the transverse 

 ridge running inwards from the lateral cornu on the lower surface. The median ridge 

 is more distinct on the posterior part of the dorsal surface. The ocular lobe nearly 

 twice as broad as long, the corneal areas much larger and more distinct than in the 

 female. Anterior abdominal somites hardly narrower and somewhat deeper than 

 posterior thoracic ; sixtli abdominal somite narrowing suddenly about the middle of 

 its length. 



Antennule (fig. 8) having three segments in the outer flagellum. 



Antenna ( fig. '.)) of normal type, its flagellum about as long as the body. First two 

 segments of peduncle bearing each a plumose seta. 



Branchial apparatus (fig. 14) more fully developed than in the female, the laminae 

 much longer and 33 in number. 



First leg (fig. 22) a little shorter than that of the female, the basis longer and 

 narrower and having a group of spines on its lower surface near the inner edge. 



Second leg (fig. 23) closely resembling that of female, except that the ischium 

 is a little lono-er. The remaining legs (tigs. 24 to 26) stouter than in the female 

 and having more numerous and longer plumose setae on the proximal segments. 



Uropods (fig. 28) differing from those of the female in having the inner edges of the 

 peduncle and endopod densely set with plumose seta? and in having a few setae on the 

 outer edge of the exopod. 



Young Specimen, 4 - 8 millims. in length : 



The outline of the carapace (fig. 5) differs considerably from that of the adults. 

 The lateral margins behind the cornua are nearly straight, the pseudorostral lobes 

 are relatively much broader, the antero-lateral tooth is more prominent and more 

 angular, and that portion of the anterolateral margin lying between the tooth and 

 the lateral cornu is straight instead of convex as in the female. 



Locah'tti is. Many specimens from the Gulf of Manaar, on the Cheval Paar, depth 

 6 to 7 fathoms ; and on the Periya Paar Kerrai, depth 8 to 9 fathoms. 



Eocuma affinis, n. sp. Plate II., figs. 29 to 34. 



Description of adult Male, 67 millims. in length : 



Differing from the last species in the narrower and less depressed form of the 

 carapace, which is about three-tenths of the total length and evenly rounded at the 

 sides without any lateral keels. Seen from above, the sides are nearly parallel, 

 and the greatest width is little more than half of the length. The cornua are rather 

 prominent, curved, and directed forwards. In front, the antero-lateral margin is 

 finely serrate. On the dorsal surface a transverse depression crosses the hinder part 

 of the cephalic lobe. The pitting of the surface of the carapace (fig. 31) is more 

 marked than in the last species and the minute reticular texture is less distinct. 



