. Fig. 30. A. Cornucopina grandis (Busk). , 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 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 for
. Fig. 30. A. Cornucopina grandis (Busk). , 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 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 ( 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
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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
