62 ZOOLOGISCHE MEDEDEELTNGEN — DEEL V. 



anterior five ones are enlarged in their basal part. In an epitocous para- 

 podium of the male the dorsal cirrus, provided with six papillae along 

 its ventral border, extends beyond the distal extremity of the dorsal 

 ligule, that has grown elongated and slender; a fan-shaped lamella has 

 been developed at the base of the dorsal. cirrus and another small one 

 at the base of the dorsal ligule. The median ligule is somewhat shorter 

 than the dorsal one and also provided with a lobe at its base. At the 

 posterior side of the ventral lobe a large lamella is present, limited dis- 

 tally by a straight border, not a rounded one as in Ner. mictodonta^ 

 according to Izuka. A large oval lamella occurs ventrally at the base 

 of the long ventral cirrus and two elongated ones are placed dorsally. 

 The ligulae as well as the dorsal and ventral lamellae are abundantly 

 furnished with dark-coloured glandular bodies. Each segment on the lateral 

 side of the back shows a transverse ridge-shaped thickening, especially 

 in the epitocous region of the body. On the road of Koepang a large 

 male (Heteronereis form) was captured, measuring 110 mm. in length ; 

 it is nicely coloured on the back, brownish with white intersegmental 

 ■grooves, each of them succeeded by an other narrow, transverse, white 

 band ; moreover there occurs a dark median dorsal line. The dorsal cirri 

 show about 9 papillae along their inferior border. 



Nereis (Ceratonereis) ramosa n. sp. 



Siboga-expedition, Stat. 96. South-east side of Pearl-bank. Sulu archi- 

 pelago. Tow-net. 5 specimens. 



8tat. 296. 10° 14' Lat. S., 124°5'.5 Long. E. Anchorage of Noimini, 

 South coast of Timor. Reef exploration. 1 specimen. 



South of Flores; 122° 39' Long. E. Dr. van der Sande. January 1909. 

 1 specimen. 



A Ceratoner eis-s^ecies (Heteronereis-îovm) differing from the species of 

 this subgenus hitherto described, not only by the armature of its pro- 

 boscis as well as by the peculiar branched appendages at the lobes of 

 the epitocous parap'odia. The largest specimen has a length of 35 mm. 

 The body is punctulated with black spots and there occurs a dark trans- 

 verse band over the dorsal side of the buccal segment. The head is rec- 

 tangular, much broader than long, its frontal border faintly protuberant; 

 its lateral sides are entirely occupied by a pair of large, coalescent eyes. 

 The antennae reach to the distal end of the basal joint of the palps. 

 The longest tentacular cirrus extends over 8 to 9 anterior segments. The 

 armature of the proboscis consists of: 



I = 2 or 3 conical paragnaths, one behind the other. 



II = a group of 8 paragnaths, arranged in a crescent, longitudinal 

 row ; the 4 largest ones in front. 



