. Bulletin of the British Museum (Natural History). 14b PATRICIA L. COOK C. planum, which has no spines. Both species occur in the Mediterranean, but C. tenuirostre alone occurs from Madeira and west Africa. The remarkable convergence of characters already noted between Membrani- porella nitida, and Callopora rylandi and C. conjtuens, is repeated, to a lesser extent, between C. conflnens and Copidozonm tenuirostre. The ovicells are very similar, and the hooked, setiform mandibles are almost identical in ihe two species. The delicate lateral spines are not often present in the west African mate
. Bulletin of the British Museum (Natural History). 14b PATRICIA L. COOK C. planum, which has no spines. Both species occur in the Mediterranean, but C. tenuirostre alone occurs from Madeira and west Africa. The remarkable convergence of characters already noted between Membrani- porella nitida, and Callopora rylandi and C. conjtuens, is repeated, to a lesser extent, between C. conflnens and Copidozonm tenuirostre. The ovicells are very similar, and the hooked, setiform mandibles are almost identical in ihe two species. The delicate lateral spines are not often present in the west African material, but the oral spines are large, and may be directed distally, upward, or occasionally curved proximaUy over the opesia, in a similar manner to those of Crassimarginatella falcata, see p. 153. In the west African Collections C. tenuirostre is almost exclusively found encrusting Jullienella Figs. 12-16. Aspidelectra, Callopora, Copidozoum and Parellisina. Scale = 0-5 mm. 12. Aspidelectra densuense n. sp. i zooid showing oral and frontal spines, Achimota Collection, 89B. 13. Callopora confluens n. sp. i zooid with an ovicell and paired avicularia, " Calypso " Collection, C57E. 14. Copidozoum tenuirostre (Hincks). i zooid with ovicell and avicularium, Marche-Marched Collection, II, 14M2. 15. Callopora depressa n. sp. a. i zooid with an ovicell and a pair of distal spines, b. i zooid with marginal spines. Note the concave gymnocyst (ovicell damaged), Achimota Collection, 45D. 16. Parellisina curvirostris (Hincks). i zooid with an ovicell, and an avicularium with large distal chamber, " Calypso " Collection, C Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). London : BM(NH)
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