50 



LrMBKICOXEREIS 



Another form dredged by the " Chiillenger," :it Station 141 

 (off the Cape of Good Hope), differs from any in the present 

 collection. It is distinguished by the presence of a single long- 

 winged hook (" Challenger " Annel., PI. xvii<7., fig. 15) in the 

 anterior feet. An increase in the length of the tips of the second 

 group of superior bristles anteriorly, and yellowish spines are 

 other features. In the dental apparatus, the maxilLie had trans- 

 lucent hard tips, and the basal ridges did not correspond. The 

 left great dental plate had four, and the right five teeth. The 

 outer lateral plate in front is larger than in Luiiibi icoucreis 

 tetraiinis, and bears two teeth. The inner has a short tooth. 



As the only example was injured, it is well to draw attention 

 to this species. 



LUMBRICOXEREIS CAVIFROXS, Grube, 1 867. 



1867. f^nmlmcoiiereis Cdvifroiis, Grube. Ann. "Novara" 

 Exped., p. 13, Taf. i, fig. 5 ? 



1868. Lmubriconcreis gracilis, Ehlers. Borstenw. ii., p. 393, 

 Taf. xvii., figs. 6 — 10. 



Procured at St. James, False Bay, between tide-marks. 



A small species about if ins. long. 



The head forms a smoothly rounded blunt lobe in front, and 

 is slightly constricted at the posterior border. A minute median 

 band connects it dorsally with the first segment. In lateral 

 view, the snout is nearly of equal depth throughout, so that the 

 tip is characteristically blunt, but such is probably due to the 

 degree of contraction, for in another example, with a deep 

 median sulcus on the ventral surface of the snout, the latter 

 was less blunt in profile. The dorsal groove mentioned by 

 Grube in Lmnbricoiicreis cavifrons, was not present in these. 



The body is very little narrowed anteriorly, remains for some 

 distance of nearly uniform diameter, and then tapers gentlv 

 towards the tail — which, in the examples, had four short cirri 

 (like papillcc ), the two upper being the longer. The segments 

 are very distinctly marked. The general colour of the body is 

 pale brown, wilh only a little iridescence on the curves of the 

 segments, and thus is in marked contrast with Lnnihricoiiciris 

 fiiniiinis. The cuticle is also somewhat delicate. 



The dental apparatus (Plate iii. Hg 21) presents a pair of 

 strongly curved sharp maxilla? which pass backward to converge 

 at a narrow pedicle connecting Ihem wilh the posterior ap- 

 pendages. After a constricted region the latter again dilates, but 

 the specimen is incomplete, though apparentlv they terminate in 



