OPHELIIDAE 167 



Benham attaches some importance to the shape and length in relation to number of 

 segments in his specimens. I cannot follow him here : the examples before me vary in 

 shape from that of a cigar to that of an acorn. 



I have examined Mcintosh's three co-types, and they vary considerably in their 

 degree of papillation, the most extreme example being serrated rather than strongly 

 papillated. In my view all the intermediate stages between a faint areolation to large 

 papillae are present in this species. 



To summarise my remarks, I suggest that T. olens should be provisionally separated 

 from T. kerguelensis , on the ground that T. olens has 29 to 31 segments and T. ker- 

 guelensis 23 to 27; that T. olens has 15 to 16 segments involved in the posterior division 

 of the body and T. kerguelensis 10 to 11; and that in T. olens the body passes gradually 

 into the anal cylinder which is equal in length to the last two segments, whereas in 

 T. kerguelensis the anal cylinder, which is equal in length to the last four segments, 

 comes off more abruptly from the body. Moreover, the terminal segments in T. olens 

 are smooth and in T. kerguelensis more or less laciniated or papillated. 



Ehlers regards T. olens as identical with the European T. forbesii. The latter species 

 seems to me to be nearer to T. kerguelensis than to T. olens. Fauvel gives 23 to 26 for 

 the number of segments of T. forbesii. I have also observed that the longitudinal 

 furrows of the anal cylinder are fewer and the areas they delimit larger than in 

 T. kerguelensis. 



Travisia kerguelensis, Mcintosh, var. gravieri, var. nov 



:o. 64° 48' 30" S, 6; 



^Ttrm. T 



St. 187. 18. iii. 27. Neumayr Channel, Palmer Archipelago. 64° 48' 30" S, 63" 31' 30" W 

 259 m. Gear DLH. Bottom: mud. Nine specimens. 



St. 190. 24. iii. 27. Bismarck Strait, Palmer Archi- 

 pelago. 64° 56' 00" S, 65° 35' 00" W. 315 m. Gear 

 DLH. Bottom: mud and rock. Three specimens. 



Remarks. This variety differs from T. ker- 

 guelensis in the absence of papillation or laciniation 

 of the terminal segments, and in the presence 

 of a pair of short dorsal anal cirri (Fig. 68) at the 

 end of the anal cylinder. I have named this \f \j '^ 



variety after my esteemed colleague, Prof. C. r- aq -t- ■ ■ i, i ■ 



Gravier of Paris. gmvieri. Pygidium. 



Genus Kesun, Chamberlin 

 Kesun abyssorum, n.sp. 



St. 177. 5. iii. 27. 27 miles SW of Deception Island, South Shetlands. 63° 17' 30" S, 

 61° 17' 00" W. 1080 m. Gear DLH. Bottom: mud and stones. One specimen. 



Description. The body (Fig. 69, a) is acorn-shaped from contraction, and measures 

 21 mm. for 23 chaetigers. The diameter is 6 mm. at its widest part. There is a very short, 

 blunt, smooth prostomium, followed by a triannulate buccal segment with paired 



