246 On Pycnogonida from the South Orkney Islands. 



Colossendeis robusta, Hoek. 



Colossendeis robusta, Caiman, " Pycnogonida," Brit. Antarct. (' Terra 

 Nova') Exp., Zool. iii. no. 1, 1915, p. 24 (with references). 



Locality. — Scotia Bay, South Orkneys ; one female. 



Remarks. — This specimen agrees closely with the male 

 from the ' Terra Nova ' collection, which it slightly exceeds 

 in size ; but the spinules on the legs, although present, are 

 smaller and apparently fewer. The femur and the second 

 tibia are of equal length. 



Pentanymphon antarcticum ) Hodgson. 



Pentanymphon antarcticum, Caiman, " Pycnogonida," Brit. Antarct. 

 ('Terra Nova ') Exp., Zool. iii. no. 1, 1915, p. 27 (with references). 



Locality. — Scotia Bay, South Orkneys ; two specimens. 



Remarks. — The ratio between the width of the cephalon 

 anteriorly and that of the neck is about 2'8 in these specimens, 

 which in this respect do not differ from those recorded from 

 the Ross Sea. 



Nymphon orcadense (Hodgson). 



Chcetonymphon orcadense, Hodgson, Trans. Roy. Soc. Edinburgh, xlvi. 

 1908, p. 173, pi. ii. figs. 2, 2 a. 



Locality. — S. Orkneys. Dredge. 6 fms. April 1915. 

 Eight specimens (one ovigerous). 



Remarks. — Hodgson records an " enormous number of 

 specimens" of this species from Scotia Bay, and some of 

 these, presented to the Museum by Dr. W. S. Bruce, show 

 the closest agreement with Mr. Bennett's specimens. 



Ammothea carolinensis, Leach. 



Ammothea carolinensis, Caiman, Ann. & Mag. Nat. Hist. (8") xv. 1915, 

 p. 310, figs. 1-3 (with synonymy) ; id. " Pycnogonida," Brit. Antarct. 

 . (' Terra Nova') Exp., Zool. iii. no. 1, 1915, p. 51. 



Locality. — Scotia Bay, South Orkneys ; one female, one 

 immature. 



Remarks. — The female is of large size (proboscis 17*5 mm. 

 long), and both specimens resemble very closely those already 

 in the Museum from South Georgia which I have referred, to 

 A. carolinensis. Although the female is larger than the 

 adult male of A. gibbosa figured by Bouvier (Pycnog. 



