AMASTIGIA 327 



A small colony found among unnamed material from Challenger St. 315 (34. 11 . 12.47) 

 has an ancestrula (Fig. 3 B). 



5. Amastigia kirkpatricki Harmer. 



Caberea kirkpatricki Levinsen, MS. 



Amastigia kirkpatricki Harmer, 1923, p. 335, pi. xvii, fig. 20, pi. xix, figs. 46, 48. 



Menipea marionensis part Busk, 1884, p. 21, pi. xiv, fig. 9. 



Station distribution. Sub- Antarctic: South Indian Ocean, Sts. 1562, 1563, 1564. 



Geographical distribution. Marion Island (Harmer; Discovery); Prince Edward Island 

 (1937. 1. 2.1; Discovery). 



The Discovery specimens agree very closely with the type-material and with Harmer's 

 description. 



A few small pieces of Amastigia sp. found among unnamed Challenger material from 

 Marion Island (34.2. 16.45) a g ree with A. kirkpatricki in the shape of the zooecia and 

 ovicells and in the absence of scuta. The zooecia are a little larger, the internodes longer 

 with a correspondingly longer series of median zooecia, and spines and heterozooecia 

 are completely absent. The position of this form cannot be settled from such scanty 

 material. 



6. Amastigia cabereoides (Kluge). Fig. 4 D. 



Scrupocellaria cabereoides Kluge, 1914, p. 612, pi. xxvii, figs. 3, 4 [not figs. 9, 10, see p. 323 



above]. 

 Amastigia caberioides Harmer, 1923, p. 335. 

 Station distribution. Not represented in the Discovery collections. 

 Geographical distribution. Wilhelm II Land (Kluge); Oates Land (Terra Nova) 

 The specimens of Amastigia cabereoides obtained by the ' Terra Nova ' consist of a 

 few small fragments, but agree exactly with Kluge 's description, except for the scutum 

 which has a larger proximal lobe (Fig. 4 D). The zooecia of the inner series are partially 

 excluded from the basal surface. 



This species is closely allied to A. kirkpatricki. It differs in possessing scuta, and in 

 its joints which resemble those of other species of Amastigia, while those of A. kirk- 

 patricki have the structure found in Scrupocellaria. 



7. Amastigia vibraculifera sp.n. Plate VII, fig. 1 ; Fig. 4 E. 

 Station distribution. Sub- Antarctic : South Atlantic, Sts. WS 84, WS 85. 

 Geographical distribution. Falkland Islands (Discovery). 

 Holotype. St. WS 85. 



This species is related to Amastigia cabereoides Kluge from which it differs in having 

 more numerous series of smaller (particularly shorter) zooecia, with more numerous, 

 stouter spines and pear-shaped scuta directed obliquely backwards, without distinct 

 proximal and distal lobes (Fig. 4 E). The marginal zooecia usually have one inner spine 

 and four outer ones. The inner zooecia have two or sometimes three spines on one side 

 and one on the other. Most branches have four series of zooecia through most of their 



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