i84 DISCOVERY REPORTS 



Genus Polycirrus, Grube 



Prostomium a large and folded lobe bearing very numerous tentacles. No gills. The 



notopods begin on the second or third segment and the neuropods are very variable in 



their segment of origin, being sometimes altogether absent from the anterior region. 



The dorsal bristles are smooth or spinous. The hooks are avicular and arranged in 



single rows. 



Dorsal bristles very narrow and bordered ... ... ... ... ... ... P. hesslei 



Dorsal bristles with rather wide, unbordered wings ... ... ... ... P. kerguelensis 



Polycirrus kerguelensis (Mcintosh). 



Ereutho kerguelensis, Mcintosh, 1885, p. 474, pi. xxviiiA, figs. 20-21. 

 Polycirrus kerguelensis, Gravier, 191 1, p. 141, pi. xi, fig. 136. 

 Hessle, 1917, p. 221. 



Occurrence. St. 42 (2); WS 33 (i). 



Specific characters. These specimens like the others recorded by me from South 

 Georgia have 1 1 pairs of cirrigerous notopods and the neuropods begin behind the last 

 notopod. There may be as many as 15 pairs of notopods, and neuropods may be present 

 on the last two or three thoracic segments. The ventral gland shields of the first and 

 second segments form a broad plate divided by a groove into a larger anterior and a 

 smaller posterior part. 



The lateral pads are well developed for about the first five chaetigers. The bristles 

 have rather broad serrated wings. The hooks have in profile two teeth above the main 

 fang. 



Polycirrus hesslei, Monro. 



Monro, 1930, p. 195, fig. 81 a-c. 



Occurrence. St. WS 583 (i). 



Specific characters. Cephalic lobe a trilobed, undulating membrane. Ventral 

 glands of first, second and anterior part of third segment fused into a large roughly 

 shield-shaped pad. About 10 pairs of ventral gland shields widely separated in the 

 median line. Bristles begin on the second segment and there are 13 pairs of notopods 

 with cirriform processes. The bristles are lightly bordered capillaries. The hooks begin 

 at the 14th chaetiger, and above the main fang there is a single tooth surmounted by a 

 row of about six denticles. There are six pairs of nephridia extending from the third to 

 the eighth segment. They decrease in size from the first to the third pairs ; the remainder 

 are of equal size and smaller than the third pair. 



Genus Hauchiella, Levinsen 

 No bristles or hooks. The anterior nephridia are longer than the posterior. 



Hauchiella tribullata (Mcintosh). 



Hessle, 1917, p. 233, with synonymy. 

 Mcintosh, 1922, p. 201, pi. cxxxviii, figs. 13, 13 a, b. 

 Monro, 1930, p. 197. 

 Occurrence. St. 123 (i). 



