Nemertinea cOc. from the FaJklands, 297 



a fold or tliickenino' running down tlie middle o£ the spicule, 

 like a mid-rib. The two spicules slide in a single accessory 

 piece (Hg. 4, A.P.)^ situated near their distal ends in the 

 position of repose. This accessory piece is apparently bent 

 so as to form a deep slot in which the posterior ribs of the 

 spicules are lodged. It is neail}-- half as long as the spicules 

 themselves. There is a single pair of minute papillae 

 (fig. 4, P.) situated just in front of the anal aperture. 



In the female the vulva is situated slightly behind the 

 middle of the body. The two ovaries are about equal in 

 length, and are reflexed. No fully-formed eggs were 

 observed in the uterus. 



The specimens were taken under stones at Roy Cove, 

 June 20, 1910. 



ExOPLUS, Dujardin. 



6. Eiwplus micliaeheni, v. Linst. 



Enoplus michaeheni, v. Linstow, 1896, p. 10; figs. 14-16; de Man, 

 1904, p. 19 ; pis. iv.-vi., fig-. 7. 



Of this species two examples occur in the collection, both 

 females. They were taken under stones at Roy Cove, 

 June 20, 1910. 



7. Enoplus sp. 



There is a single example of a second form which is 

 possibly to be referred to this genus. It is a female, measuririi^ 

 about 2 mm. in length, and occurred among other small 

 nematodes and oligocluetes, in association with Marphysa 

 corallina, July 22, 1910. • 



It does not seem desirable to found a species upon this 

 unique specimen. 



Oncholaimus, Dujardin. 



8. Oncholai'mus sp. 



A single female specimen, apparently belonging to this 

 genus, occurred with various other forms among Marphysa 

 corallina, July 22, 1910. It measures a little over 5 mm. in 

 length, and is the largest of the nematodes met with, with the 

 exception of Leptosomatum selosum. 



