82 ZOOLOGISCHE MEDEDEELINGEN — DEEL VI. 



propinqua Mar. & Bobr. loc. cit. p. 50, Pis. Y and VI, fig. 15. 

 Southern, loc. cit., p. 47. Ballynakill harbour, North Coast of France, 

 Marseille. 



Leocrates ehlersi n. sp. 



At Station 312, Saleh bay (N. coast of Sumbawa), the Siboga-expedi- 

 tion captured several individuals of a Leocr ales-species , which, though 

 closely allied to Leocratides filamentosus Ehl. cannot be identified with it. 

 The species is especially characterized by the singular armature of its 

 proboscis, for its dorsal jaw, in stead of having a conical shape, is double 

 and much resembles the mandibles of an Eunicid; each half consists of 

 a long shaft, nearly of the same breadth over its whole length and of 

 an expanded anterior plate. The ventral jaw is a simple, conical organ; 

 both jaws have a pale yellow colour. The cephalic lobe is broader than 

 long, somewhat heart-shaped, with a straight, anterior margin and a 

 deeply emarginated posterior border, that is prolonged in two diverging 

 processes like in Castalia longicirrata Treadw. The longest of the tenta- 

 cular cirri reaches to half the length of the body. The parapodia are 

 uniramous ; however in the base of the dorsal cirrus a couple of minute 

 aciculae are visible. The neuropodium bears a rather long, dorsal, conical 

 lip, in which the large acicula terminates with its apex. The ventral setae 

 consist of a stout, short, faintly bent shaft, with a short, bevelled extre- 

 mity ; their terminal blade is hook-shaped, much less slender as in other 

 Leocrates-s^eeies and it possesses only a single tooth and lacks the 

 secondary process beneath the bifid tid. 



The worms have the usual, Hesionid-appearance and measure about 

 25 mm. in length; they are entirely discoloured except a violet subneu- 

 ral band. The bristles are greenish. 



Like as Leocratides filamentosus the Siboga-specimens were found in 

 a species of Aphrocallistes, a Hexactinellid-sponge. 



Leocrates indicus n. sp. 



At Station 221 of the Siboga-expedition, in the depth of the Banda 

 Sea (2798 m.), a small Leocrates-specimen was dredged, about 15 mm. 

 long, which is closely allied to Leocr. atlanticus Mc Int. from the Atlan- 

 tic abyss. The worm is colourless except a brownish subneural band, 

 that is interrupted in the transversal line between the parapodia. The 

 greater part of the cirri are broken off and the anal extremity is some- 

 what mutilated. There are 16 setigerous segments. The cephalic lobe is 

 rounded rectangular, somewhat broader than long; its surface by a lon- 

 gitudinal and a transversal groove is divided in four convex area's. In 



