4o 4 DISCOVERY REPORTS 



7. Cornucopina ovalis var. versa var.n. Fig. 30 B-D. 



Station distribution. Sub- Antarctic : South Atlantic Ocean, Sts. WS 228, WS 229, WS 246, 

 WS 840, WS 871. 



Geographical distribution. Off Patagonian Shelf, below 200 m. (Discovery); Kerguelen? 

 (34.2.16.44). 



Holotype. St. WS 871, off Patagonian Shelf. 



These specimens resemble the type specimen of Cornucopina ovalis in their zooecial 

 characters, but differ in their avicularia. Ovicells are unknown. The basal avicularia 



Fig. 30. A. Cornucopina grandis (Busk). 99.7.1 .4541, Victoria (one of Goldstein's mounts) to show the 

 relation of the spines to the ovicell for comparison with C. ovalis, Fig. 29 A. The connexion of the ovi- 

 cells with the distal zooecia is shown by dotted lines. B-D. C. ovalis var. versa var.n. B, C. St. WS 871, 

 off Patagonian Shelf. Frontal and basal views. D. St. WS 840, between Burdwood Bank and Patagonian 

 Shelf. Basal avicularium as seen in a side view of the branch. 



bk. beak, c. cryptocyst, mdb. mandible. 



(Fig. 30 B-D) are rare. They are larger and stouter than those of the typical form, taper 

 evenly, and project from the basal surface of the branch with the mandible directed 

 basally (i.e. as in C. grandis and not as in typical C. ovalis). The palatal surface is terminal 

 and transverse and the beak stout and prong-like. Frontal avicularia are commonly 

 found on non-fertile zooecia and are usually much more numerous than in the typical 

 form. They are a little larger than those of the typical form, but are not constantly 

 different in shape. 



The fragments from Sts. WS 228, WS 229 and WS 246 do not possess basal avicularia 

 but are included in the variety rather than in the typical form on account of their 

 locality. Frontal avicularia are present on some non-fertile zooecia. There are no 



