Gutty Marine Laboratory ^ St. Andreios. 7 



resemblances iu the body and posterior bristles to Sagitella 

 opaca, Ehlcrs *, one of the Typhloscoleeidee, it difTers wholly 

 in the cephalie region and other respects. On the whole, 

 Fauveliopsis appears to approach the Chlorsemidse. 



Bradu gravieri, sp. d. 



Trawled by the 'Challenger' at Station 158, considerably 

 sontli of Australia, lat. 50' 1' S., long. 123° 4' E., in 

 Globigerina ooze, along with Hyalinoecia benthaliana and 

 Grubiaaella antarctica, var. A small, somewhat elongate- 

 ovoid annelid, 5 mm. long by 2 mm. at its widest part 

 (PI. I. fig. 4), the surface of which was uniformly 

 covered with a whitish coating like down, but on examina- 

 tion this was found to be a calcareous powder with fragments, 

 often rounded, of Glohigerince on the papilla3 of the surface, 

 and which partly fell off when touched, leaving a white 

 powder on the bottom of the vessel. The entire annelid, 

 both dorsally and ventrally, was thus coated, with the excep- 

 tion of the extruded proboscis. The extension of the con- 

 tinuous and dense villous coatin:^, ventrally as well as 

 dorsally, distinguishes it from B. villosa, Rathke, from which 

 it also differs in shape. The entire surface is coated Avith 

 extremely long slender papillae, far exceeding proportionally 

 anything hitherto known in the group, and in tliis tangled 

 web the calcareous ooze lodges, besides coating the papillae 

 with minute granules. So far as could Ije observed, they 

 seemed to be simple filamentous papillje without special 

 differentiation at the top — that is, without a terminal dila- 

 tation. The muscles of the body-wall, both circular and 

 longitudinal, are Avell developed. 



As far as could be ascertained, the dorsal bristles con- 

 sisted of a minute tuft (PL I, fig. 5) of translucent finely 

 tapered bristles, the tips of which were apt to bend; these had 

 the usual muscular fasciculi at their bases. Their minute 

 size is in bold contrast with the ventral series, most of 

 which had been broken. These consisted of proportionally 

 large, straight, translucent bristles (PI. I. tig. 6 and PI. III. 

 fig. 1, tip), which when entire must have projected con- 

 siderably on each sideof the annelid, and may have supported 

 it iu the soft Globigerina-ooze, if they did not aid in progres- 

 sion. They are thin-walled and in the preparation showed a 

 ridge, apparently from collapse. Their diameter at the widest 

 part exceeded that of the long slender papillaj. No trace of 

 the transverse marks, so characteristic of the bristles of the 



• Deut. Sud-Pol. Exped. 1901-3, p. 529, pi. xxxix. figs. 16 & 17. 



