MENIPEA 33i 



opesia. The ovicells are usually longer than wide, sometimes more nearly spherical. 

 The ectooecium has faint striations, radiating from a median longitudinal line. 



A young colony with ancestrula was obtained at St. TN 194, off Oates Land, on 

 22 February 191 1. It was slung by rootlets. The ancestrula (Fig. 4 B) is of the same 

 type as that of Amastigia benemunita but is longer and relatively narrower. The oval 

 opesia has a granular cryptocyst and there are six spines, widely spaced round the 

 opesia so that two are distal and two are on each side, one near the distal and the other 

 near the proximal end of the opesia. The ancestrula gives rise to two zooecia. 



11. Amastigia crassimarginata (Busk). Fig. 4 C. 

 Caberea crassimarginata Busk, 1884, p. 28, pi. xi, fig. 1. 

 Cauda crassimarginata Waters, 19 13, p. 480. 

 Amastigia crassimarginata Harmer, 1923, p. 334. 



Station distribution. Sub-Antarctic: South Atlantic Ocean, St. WS 840. 

 Geographical distribution. Off Patagonian Shelf, below 400 m. (Busk; Discovery). 

 This specimen (Fig. 4 C) agrees closely with the type except that the proximal lobe 

 of the scutum is broad. 



12. Amastigia abyssicola (Kluge). 

 Scrupocellaria abyssicola Kluge, 1914, p. 611. 

 Amastigia abyssicola Harmer, 1923, p. 335. 



Scrupocellaria funiculata Waters, 1904, p. 23, pi. viii, figs. 1 a, b. 

 Station distribution. Not represented in the Discovery collections. 



Geographical distribution. Southern Ocean, 2450 m. (Kluge) ; Bellingshausen Sea, 2800 m. 

 (Waters). 



I have seen no specimen of this species. Its basal heterozooecia are undescribed, 

 and its most characteristic feature appears to be the lobed lumen of the scutum. The 

 cryptocyst is described as wide and granular. 



Menipea Lamouroux, 18 12 

 Key to the species 



1. Zoarium bi- or triserial ... ... ... ... ... ... ... ... ••• ••■ 2 



Zoarium pluriserial ... ... ... ... ... ... ... ... -•• ••• 9 



2. Zoarium triserial, at least in part, ovicells present ... ... ... ... ••• ••• 3 



Zoarium biserial except for presence of an axillary zooecium, ovicells rudimentary or 



absent ... ... ... ... ... ... ... ... ■•• ••• ••• 4 



3. Zoarium mainly biserial, branches keeled frontally, frontal avicularia usually single, crypto- 



cyst with spines M. marionensis 1 



Zoarium mainly triserial, branches flat, frontal avicularia often paired on median zooecia, 



cryptocyst commonly with a median tooth 5- M. triseriata 



4. Opesia occupying whole frontal surface, branch compact straight-sided, spines absent ... 5 

 Opesia not occupying whole frontal surface, branch neither compact nor straight-sided, 



spines present ... ... ... ... ... ... ... ... •■• ••• 6 



1 For the species of Menipea not discussed in this report see Harmer (1923). 



