CORNUCOPINA 403 



The fertile zooecia differ from the others in shape, having a shorter, rounder aperture. 

 In C. grandis there is no such marked difference in the shape of the whole fertile 

 zooecium, but the common base of the outer spines is rather long and stands beside 

 the ovicell, following its curvature (Fig. 30 A). In C. ovalis these spines are basal to the 

 ovicell and therefore hidden (except for their tips) in frontal view (Fig. 29 A), and their 

 common base is not longer in fertile zooecia. 





Fig. 29. A-C. Comucopina ovalis sp.n. St. 160, Shag Rocks. A. Frontal view. One of the avicularia has a 

 broken beak (dotted). B. Basal view of the non-fertile zooecium shown in Fig. A. C. Frontal avicularium 

 in profile. 



b.av. basal avicularium, c. cryptocyst,/.aw. frontal avicularium, op. operculum. 



It is clear from his figures that the specimen recorded as Bicellaria grandis by 

 Waters (1904, p. 26) belonged to Comucopina ovalis rather than to C. grandis (Busk). 

 Unfortunately, Waters did not find avicularia or ovicells. His specimen came from the 

 Straits of Magellan, but the depth is not recorded. As typical C. ovalis has only been 

 found at the Shag Rocks, near South Georgia, and var. versa at the deeper Falkland 

 stations (267-463 m.) and perhaps at Kerguelen, there is no geographical clue to the 

 identity of Waters 's form. 



