88 



Genus Weberia Horst. 

 Morst, Zool. Mededeel. R. Museum Nat. Historie, Leiden, vol. I, 191 5, p. 246. 



Body short. Lateral frontal lobes of the prostomium prolonged into the basal joint of 

 the antennae. Parapodia without ventral cirrus except in the 2'^ segment. Notopodial fascicle 

 absent, neuropodial one consisting of hook-shaped bristles. Elytra presumably 18 pairs, situated 

 on segments 2, 4, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 24, 26, 27, 29, 30 and 32. 



I. Weberia pustulata Horst. PI. XIX, figs. 11 and 12. 



Stat. 45. 7° 24' Lat. S., 1 18° 15. 2 Long. E. South off Postillon Islands. Depth 794 M. 1 specimen. 

 Stat. 314. 7° 36' Lat. S., i i7°3q'.8 Long. E. South off Paternoster Islands. Depth 694 M. 2 

 specimens. 



At the above-named Stations, in a considerable depth, three Lepidonotijiae were dredged, 

 differing in several characters from the species, hitherto described. Unfortunately they are 

 somewhat incomplete, for the elytra as well as most cirri are absent. The specimen of Stat. 

 45, a female, measures nearly 20 mm. in length and has about 40 segments. 



The head (PI. XIX, fig. 11) is rounded, more broad than long, prolonged anteriorly in 

 the two stout basal joints of the lateral antennae, which are nearly as long as the head ; their 

 distal part is only a trifle longer than the basal one, with an abruptly filiform tip. From the 

 middle of the head a large basal joint of the tentacle arises, its distal part is broken off. The 

 palps are stumpy, conical. No eyes are visible. The tentacular cirri lack their distal joint. 



Each segment bears a papilliform tubercle in the middle of the dorsum ; this series in 

 combination with the longitudinal rows of dorsal tubercles, elytrophores, cirriphores and noto- 

 podia gives to the body a pustulate appearance. A distinct groove occurs in the middle of 

 the ventral side. , 



The parapodia are characterised by the total absence of a ventral cirrus; this 

 organ being only present in the first setigerous segment (the 2'^'). It consists of a rather stout 

 basal part and a distal joint with filiform tip, hardly extending beyond the extremity of the 

 neuropodium. Especially in the anterior body-region the parapodia do not ly in the same line, 

 but show an alternate arrangement like in Hermodice car^incjilata. 



Each parapodium (PI. XIX, fig. i 2) consists of a papilliform notopodium, only containing an 

 acicula and a much larger neuropodium, that shows transverse folds at its ventral side. In the 

 neuropodium the anterior lip is rounded, ellipsoidal, with an incision in the outer margin, whereas 

 the smaller, posterior one is provided with several papillae. The neuropodial fascicle contains 

 tour yellow, hook-shaped setae, that are dilated below the curved apex, where they are pro- 

 vided with several indistinct, densely crowded, denticulated rows. Presumably there are 18 pairs 

 of scales, situated on segments 2, 4, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 24, 26, 27, 29, 30 

 and 32, but as none of them has been preserved, nothing can be said about them ; the arrange- 

 ment of the elytra thus differing from that in other Lepidonotinac, in which usually behind the 

 23^^ segment the elytrophore-bearing segments alternate with two cirriphore-bearing ones. Each 



44 



