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 
(fig. Gh) 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 backward and outward towards the second pair of 
trunk-legs, and thence further, obliquely backward, they are pretty long. Trunk-legs com- 
paratively small. The first pair (fig. 6a and fig. Gf) 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 sete, 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 this 
articulation, provided with a number of hairs. The second pair of legs (fig. 6g) 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, blunt process (presumably an outer branch) ending in a seta, and 
the leg ends in two hairy sete, 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. 1c), oblong, somewhat flattened; the specimen 
represented has young ones in the Nauplius stage, and is 103mm. in length and ‘69 mn. 
in breadth. Eggs numerous and small. 
LARVA. Fig. 1e is drawn from specimens pulled out of the egg-membranes. The 
front on each side inside the base of the antennula has a long, oblique list, the ends of 
which are curved inward. Antennule 3-jointed; the olfactory seta about half the length of 
the cephalothorax. Antenne almost the length of the antennule; 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. Maxillule as in S. Calliopii, 
with four branches which, however, are shorter and more slender than in this species, and 
the hindmost branch only is hairy (not, as in the drawing, the penultimate one as well). 
The joints of the maxille each of medium length, smooth. Second joint of the maxillipeds 
considerably shorter than the third. Segments and sete of the abdomen as in S. Calliopii, 
with the exception that the long sete 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. 
