106 Records of the Indian Museum. [Vou. V, 1910.] 
irregularly triangular, the broadest part being the uppermost one. 
Rostral latus saddle-shaped, rather deep, its chief concavity being 
in the margin opposite the inframedian latus, with which it is 
almost in contact. Rostrum small, quadrangular, broader above 
than below. 
APPENDAGES, etc. Jf irsi cirrus rather long, widely separated 
from the second ; the anterior branch longer than the posterior by 
nearly two joints and about half as broad as that branch in the 
middle ; the hairs on both joints numerous and stout. The other 
cirri moderate, densely haired. Anal appendages slender, filiform, 
tapering, extending well beyond the junction of the rami of the 
sixth cirrus, having about eight joints, of which the second is 
much the shortest and the first the longest; the distal joint bearing 
at its tip two plumose bristles, of which the posterior is shorter ; 
a similar bristle issuing from the vosterior side of the inferior 
margin of the penultimate joint. Penis absent. 
MouryH parts. Labrum not bullate. Outer maxilla short and 
broad. Palp conical, with a few stout, short hairs at its apex. 
Maxilla narrow, with a shallow incisure near the centre of its free 
edge ; external to the incisure two or three stout bristles and on 
its outer margin a much shorter one; internal to it five or six 
bristles of various sizes, their bases being on a lower level than those 
of the external bristles. Mandible with four teeth including the 
inner angle; the outermost tooth slightly larger than the second 
and by no means widely separated from it; the two innermost 
teeth close together, the fourth being small and sharp, pectinate on 
its outer margin and bearing a row of short hairs on its inner 
margin. 
Several specimens of this species were taken by the 
“Tnavestigator at Station 972 (wat-13°>) 54: 15-- Nv Lons94 a2 
15’ E.), at a depth of 643 fathoms. 
S. lambda 1s closely related to S. curiosum, Hoek, from which 
it may at once be distinguished by the form assumed by the bases 
of the carinal latera as viewed from behind and by that of the 
carina as viewed from the side. 
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