2«8 Mr. H. A. Bajlis on some 



XXXI. — Some Nemertinea, Free-living Nematoda and OUgo- 

 chcBta from the Falklands. By H. A. Baylis, B.A. 



(Published by permission of the Ti-ustees of the British Museum.) 



The material described in this paper was collected by 

 Mr. Rupert Vallentiu in tlie Falldand Islands during the 

 years 1902, 1910, and J911. V)v. J. H. Ashworth, of 

 Edinburgh, to whom it was lianded over, has kindly entrusted 

 me with the determination of the collection and the descrip- 

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

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

 tiuly littoral forms. The nemei'tines, however, and some of 

 the nematodes would probably be found to range into water 

 of considerable depth. lAneus corrugatus and Leidosomatuni 

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

 water. 



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

 coUectino-o-iound are of considerable interest : — 



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

 Falklands. Hoy 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 

 ■ irom 8 fathoms to nil. The creek is filled with ice during 

 winter, and during a S.E. gale a heavy sea runs up the creek. 

 Tlie seas round this part are terrific.^' 



The collection comprises three species of Nemertinea, seven 

 of Nematoda, and one of Oligochseta. They are the 

 following : — 



Nemertinea. 

 Amphipoeus, Ehrenberg. 



1. Amphiporxis micJiaelsem, Biirger. 



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

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



LiNEUS, Sowerby. 



2. Linens corrugatus, M'Intosh. 



Ten small examples of this widely-distributed form occur 

 in tiie collection. 1 have previously (1915, p. 128) noted its 

 occurrence at South Geoigia, and pointed out that its known 



