144 



the base of each of these merges gradually into a strong list, and these two lists run 

 forward, nearly parallel, towards the posterior margin of the rostrum. Lateral margin 

 of the head with a stripe of moderately long hairs, which from the posterior angle of 

 the margin continues upward in a vertical line across the side and the back, but the 

 hairs of this part are long. The -whole trunk, except the foremost part of the ventral 

 surface, is closely supplied with peculiar, small, transverse eminences, each of which 

 (iig. 6h) bears about ten hairs, which radiate backward and obliquely sideways; on the 

 greater part of the trunk these hairs are short, but on its hindmost third part, following 

 a line from the caudal stylets obliquely backwaid and outward towards the second pair of 

 trunk-legs, and thence further, oblicjuely backward, they are pretty long. Trunk-legs com- 

 paratively small. The first paii' (fig. 6 a and fig. 6f) consist of a clumsy peduncle with two 

 branches, the outer one a little shorter than the peduncle and ending in two about equally 

 long, hairy setae, the longest of which is not twice the length of the branch, and rather 

 thick; the inner branch is difficult to understand, it is of the same length as, but much 

 thinner than the outer one, with an articulation in its middle and, especially outside tliis 

 articulation, provided with a number of hairs. The second paii' of legs (fig. Gg) about the 

 length and breadth of the outer branch of the first pair; on the outer side, at a short distance 

 from the basis, a short, bhmt process (presumably an outer branch) ending in a seta, and 

 the leg ends in two haiiy seta?, the longest of which is double the length of the leg and 

 very thick. The caudal stylets are situated far to the front on the ventral surface, a little 

 behind the middle of the trunk; they are rather slender, each ending in a hairy seta, which 

 is equal in length to the longest seta of the second leg. 



OVISACS. They are middle-sized (fig. 1 c), oblong, somewhat flattened ; the specimen 

 represented has young ones in the Nanplius stage, and is lUo mm. in length and 69 mm. 

 in breadth. Eggs numerous and small. 



LARVA. Fig. 1 e is di'awn from specimens pulled out of the egg-membranes. The 

 fi'ont on each side inside the base of the antennula has a long, oblique list, the ends of 

 which are curved inward. Antennula; 3-jointed; the olfactory seta about half the length of 

 the cephalothorax. Antennae almost the length of the antennulae; second joint somewhat 

 longer and considerably more slender than the first one, the third joint very short, the 

 terminal seta the same length as or longer than the second joint. Maxillulse as in S. CaJIiopii, 

 with four branches which, however, are shorter and more slender than in this species, and 

 the liindmost branch only is haiiy (not, as in the drawing, the penultimate one as well). 

 The joints of the maxillae each of medium length, smooth. Second joint of the maxillipeds 

 considerably shorter than the third. Segments and setae of the abdomen as in S. CaUioxm, 

 with the exception that the long setae of the caudal stylets are only half the length of the 

 body (and perhaps even relatively shorter in the free swimming larva). 



POST-LARVAL DEVELOPMENT. Unknown. 



