's RIJKS MUSEUM VAN NATUURLIJKE HISTORIE — LEIDEN. 71 



pale-brown coloured, in the other one all the bristles are pale-yellow, the 

 glochideal ones only somewhat darker in their distal part; they are 

 directed towards the median dorsal line and arch over the elytra. Their 

 shaft is covered with minute tubercles and the tip bears on one side two 

 and on the other side three recurved fangs beneath the spear-head. The 

 short dorsal bristles of the elytral segments are nearly straight, also beset 

 with small tubercles and terminate in an acute tip, somewhat resembling 

 a pen. The bifurcate ventral setae are usually provided with an accessory 

 tooth. The head is rounded oval, with a tentacle consisting of a stout 

 conical, tuberculated, basal part, a slender median joint twice as long as 

 the head, dilated distally and a short clavate terminal part. There are 

 two large eye-peduncles, each provided with a large ventral and a smaller 

 dorsal pigment-spot. 



Genus Laetmoxice Kinberg ] ). 



Laetmonice proclucta Grube, var. 2 ). 



Siboga-expedition, Stat. 45 and 314, South off the Paternoster-islands 

 depth of 794 and 694 H. 



In the neighbourhood of the Paternoster-islands, at a rather great 

 depth, four specimens of this huge, nice worm have been collected. The 

 shape of their body is oblong fusiform, not much narrowing anteriorly 

 and posteriorly; it measures from 85 to 90 mm. in length, whereas the 

 number of segments amounts to 48 or 49 . The ventral surface is blueish 

 grey, sparingly beset with small papillae; however in two specimens it 

 is covered by a brownish coat, probably due to the presence of an alga. 

 Of the "many brownish cuticular warts", mentioned by Mc Intosh, nothing 

 could be seen. The area behind the mouth, as usually, is longitudinally 

 grooved. The dorsum is entirely covered by 20 pairs of opalescing, imbri- 

 cated elytra, arranged in the ordinary manner on the segments 2, 4, 5, 

 7 .... 23, 25, 28, 31, 34, 37, 40, 43 and 46; the last pair of them 

 have their median border somewhat concave, leaving thus between them 

 an oval opening above the anus, that is situated dorsally and surrounded 

 by a folded wall. No dorsal felt exists. 



The cephalic lobe is oblong, with globular ocular peduncles, without 

 eyes. The palps, bent afterwards over the ventral side, extend to the 

 10th or 1 1th segment. The median antenna, with a short basal part and 

 a clavate distal extremity, separated from the main axis by a constriction, 

 measures about a third of the length of the palps. Of the multi-lobate 



1) Öfversigt Kongl. Vet.-Akad. Forhandl. 1855, p. 3S2. 



2) Anneliden-Ausbeute von S. M. S. Gazelle: Monatsber. K. Akad. BerliD, 1877, p. 512. 



