394 Dr. N. Aniumdale 07i the 



median latiis triangular, narrow, with apex not retrovcrtcd in 

 either direction, sometinics expanded into a small knob. 

 Caritial lattis subtriangular ; the free extremity bent inwards 

 behind the carina, bnt sejiarated from its feUow ; umbo 

 subterminal. 



Peduncle at least half as lonj; as capitulnm, stout, cylin- 

 drical, armed with a A-ariable but always considerable number 

 of legular transverse series of small transversely elongated 

 plates covered and almost concealed by meml^rane. 



Ap/ienduyes b^c. — First cirrus with the two rami narrow, 

 subcqual, widely separated from second cirrus ; second to 

 sixth cirri moderate, with the basal portion elongated, 

 colourless. Anal appendages long and slender, with nine 

 joints ; the three distal joints much atteiuiated, the base of 

 the third being slightly beyond the junction of the rami 

 of the sixth cirrus. No penis. 



Mouth. — Labrum small, feebly bullate. IMaxilla Mell 

 developed, free edge slightly convex outwards in a regular 

 arc, with three large subcqual spines (one terminal) alter- 

 nating with the same number of smaller ones ; two groups 

 of short, stout bristles towards the inner extremity. Alau- 

 dible with four teeth ; the outermost very long, its extremity 

 fringed Avitli short spines, pointed ; the three iunermost with 

 their bases close together, short, simple, pointed j the distal 

 arm narrow and elongated. 



Dimensions. — 



nira. 



Length of capltuluiu 17 



Breadth „ 11 



Length of peduncle 11 



Locality. — Laccadive Sea, 1154 fathoms. On living shells 

 of Dentalium, with var. iavesligatoris and an Actiuian j three 

 specimens. 



Externally this form closely resembles Hoek's S. inter- 

 medium, from which it may readily be distinguished by the 

 length of its peduncle, the regular outline of its capitulum, 

 and the shape of its upper latus. The spines of the maxilla 

 are also shorter and stouter than in Hoek's species and 

 arranged differently, -while the mandible is narrower. Appa- 

 rently <S'. laccadivicum is dioecious in the strict sense of the 

 word, whereas Hoek talks of his specimens as " female and 

 liermaphrodite.'" The 'Investigator^ examples are fully 

 adult, containing (like the types of S. Alcockianum and 

 S. Gruvelii) both eggs and dwarf males. These I hope to 

 describe later. 



