AMASTIGIA 323 



Station distribution. Sub-Antarctic: South Atlantic Ocean, St. WS 245. Antarctic: Weddell 

 Quadrant, Sts. 27, 39, 42, 140, 149, 153, 159, 167, 180, 190, 599, WS 42, MS 71. 



Geographical distribution. Off Patagonian Shelf, below 300 m. (Discovery) ; South Georgia 

 (Shackleton-Rowett Expedition; Discovery); Bouvet Island (Hasenbank); South Orkney Islands; 

 Palmer Archipelago ; Adelaide Island (Discovery) ; Wilhelm II Land (Kluge) ; Oates Land (Terra 

 Nova). 



Comparison of Kluge's description and figures shows that figs. 3 and 4, on pi. xxvii, 

 represent Amastigia cabereoides and figs. 9 and 10 A. gaussi, not the reverse as indicated. 

 Harmer (1923, pp. 335, 338) apparently overlooked this, consequently describing the 



5mm. 



3mm 



Fig. 1. A. Amastigia gaussi (Kluge). 23 . 12.1 .28. South Georgia. To show giant spine and small size of 

 other spines. B. A. nuda Busk. St. WS 84, Falkland Islands. One zooecium from a colony found 

 attached to the limb of a Pycnogon (Pallenopsis glabra). C. A. gaussi (Kluge). St. 140, South Georgia. 

 A fertile zooecium from one of the inner rows in slightly oblique view. One of the avicularia distal to 

 the ovicell is broken. 



scutum and basal heterozooecium of A. gaussi under A. cabereoides, and mentioning 

 A. gaussi, instead of A. cabereoides, as being related to A. kirkpatricki. 



A. gaussi is closely related to A. nuda (cf. Fig. 1 A, C with B) from which it is dis- 

 tinguished by its long zooecia, with long gymnocyst, long opesia, and correspondingly 

 long proximal lobe to the scutum, and by its long straight-sided ovicells. Spines are on 

 the whole less numerous. For example, 2 : 1 as noted by Kluge is common on marginal 

 zooecia, though 3 : 1 is not infrequent, but 4 : 2 (a common but by no means constant 

 number in A. nuda) has not been found. Most of the spines are small and very incon- 

 spicuous, but in every specimen I have examined (with the exception of a few small 

 fragments) a few of the inner spines are of gigantic size, much larger than any found in 

 A. nuda. These gigantic spines have a slender base and widen suddenly. The spines of 



