ME. A. W. WATERS ON MEMBKAIflPOEID^. 68& 



OlSTYCHOCELLA ANGULOSA (SeiCSs). 



Oellepora angulosa, Reuss, Foss. Polyp, des Wien. Tert. p. 93, pi. xi. fio\ 10. 



Membranipora antiqua, Busk, Q. Journ. Micr. Soc. vol. vi. p. 262, 

 pi. XX. figs. 1, 2. 



Onychocella Marioni, Jullien, Bull. Soc. Zool. France, vol. vi. p. 1, & 

 woodcut. 



Membranipora angulosa, Waters, " Bryozoa of the Bay of Naples,"' 

 Ann. 8f May. Nat. Hist. ser. 5, vol. iii. p. ]22, pi. xiii. fig. 3 ; Journ. Micr. 

 Soc. ser. 2, vol. v. pi. xiv. fig. 42 (mandible figured). 



For other synonyms see my paper on North Italian Bryozoa, Quart. 

 Journ. Geol. Soc. vol. xlvii. p. 9, 



The mandibles are winged, having a membranoiis expansion at 

 one side, and this is also the case in the forms described by 

 Jullien as 0. Marioni and O. Luciae. The mandibles of M. per- 

 munita, H., M. coronata, H., Foveolaria falcifera, B., Micropora 

 lepida, H., are also winged. 



In the avicularimn there is a round imperforate disk over the 

 tactile organ. 



There are 14 tentacles. 



The presence of vicarious avicularia was made a leading cha- 

 racter in Semiescliara of d'Orbigny, and now vicarious avicularia 

 are known in M. corhula, M. pyrula, M. maderensis, M. longi- 

 corms, M. crassimarginaia, 31. papulifera, M. sculpta, M. valde- 

 munita, M. permmiita, M. velata, M. perfragilis, M. marginella, 

 M. nohilis, M. hursaria, var. 



Loc. Living : Mediterranean, Madeira, Mauritius ; Plorida ? 

 Possil : Cretaceous and Tertiarj. 



Membeanipoea pereea gilts (MacG.). (PL 47. figs. 15, 

 16, 17.) 



Biflustra fragilis, MacGillivray, '■^ Besc^-iption of New Genera 8f Sp, 

 of Australian Poly&oap 1868, Trans. R. Soc. Vict. vol. ix. p. 138. 



Biflustra perfragilis, MacG., Zool. Vict, decade vi. p. 27, pi. Ivii. fig. 1, 



Membranipora perfragilis, Hinchs, Ann. 8j- May. Nat. Hist. ser. 5, 

 vol. xiv. p. 278, pi. viii. fig. 4. 



Membranipora crassimarginata, var. erecta, Bush, Zool. Chall. Eap. 

 pt. XXX. p. 63, pi. xiv. fig. 3. 



Amphiblestrum perfragile, Ortmann, '^Die Japanische Bryozoenfauna," 

 Arch.f. Naturgesch. vol. i. 1890, p. 29, pi. ii. fig. 5. 



Membranipora perfragilis, MacG., Tert. Polyzoa of Victoria, p. 39, 

 pi. V. figs. 10, 11. 



It is not clear why MacGrillivray changed the name fragilis to 

 perfragilis, and it would be more strictly correct to adhere to 

 fragilis. 



