2ti8 Mr. H. A. Baylis 07i some 



XXXT. — Some yemerf/nea, Free-living yemntoda and OUgo- 

 cluL'ta fioin the Falldaiids. By H. A. Baylis, B.A. 



(Published by permission of the Trustees of the British Museum.) 



The material described in this jiapev was collected by 

 Mr. Rupert Vallentin in tlie Falkland Islands during the 

 yt-ars 1902, 1910, and ]911. Dr. J. II. Ashworth, of 

 JOdinburgh, to whom it was haiided over, has kindly entrusted 

 me with the determination of tli-; collection and the descrip- 

 tion of such new forms as it contains. The species were all 

 collected between tide-maiks, and most of tliem are probably 

 tiuly littoral forms. The nemertines, however, and some of 

 the nematodes would probably be found to range into water 

 of cotisiderable depth. Lineus corrugatus and Le/4osomatu}n 

 setosum, for example, are forms both known to occur in deep 

 water. 



The following notes by Mr. Vallentin on the nature of the 

 collecting-ground are of considerable interest : — 



The worms are from the " N.W. corner of the West 

 Falklands. Roy Cove, where most of the specimens were 

 gathered, is the only protected estuary in that district. It is 

 a mile and a half in length, and the depth of water varies 

 jrora 8 fathoms to riil. The creek is filled with ice during 

 wii'.ter, and during a S.E. gale a heavy sea runs up the creek. 

 The seas round this part are terrific." 



The collection comprises three species of Nemertinea, seven 

 of Nematoda, and oue of Oligochseta. They are the 

 following: — 



Nemertinea. 

 Ampdiporus, Ehrenberg. 



1. Amphiporns hricliaelseni, Biirger. 



A single specimen, probably of this species, was taken at 

 AVhale bound, " in sand near low-water mark, spring tide." 



Lineus, Sowerby. 



2. Lineus corrugatus, M'Intosh. 



Ten small examples of this widely-distributed form occur 

 in the collection. 1 have previously (li-'lo, p. 128) noted its 

 occurrence at South Georgia, and pointed out that its known 



