46 



LIB, A. w. WATZE.S 0>~ TEP.TlAET CHILOSTOHATOUG 



Although the ovicell is wider than usual, I think this must he 

 regarded a? 31. Birmirilii, and probably the number of synonyms 

 should be largely increased, as there are many fossil 3Iembraiupor<r 

 describe i with a s*aiall awloularium at the base of each zoceeium. 

 In a recent British 31. Dumcrilii in my collection there is also a 

 vicarious avicularium with the lower part wide and circular and the 

 mandibular end narrow. 



A curious mistake has been made in uniting Crihrilma PouttteUi 

 to this. This latter is pi. ix. fig. 12 of Audouin ; but Alder made a 

 slip between pis. ix. &x., and Busk foil owed him. evidently without 

 verification. 



L :. Living: European seas. Fossil: Crag: TTaipukui. 



6. Membeaotoea xobelis. Ess. (PI. YI. tigs. 7 & 10.) 



3Iemhranipora nobilis. Benss. Eoss. Polyp, des Wien. Tertiar- 

 bec-kens. p. : : «5. pi. xi. rig. 26. 



Zoarium adnate. Zooecia oval, surrounded by a border : in one 

 or two cases a vicarious avicularium with semicircular mandible. 

 Ovicell small, smooth, with a border round the central portion. 



This much resembles 31. flustroides, Hincks, in shape and 

 character : but in the fossil the avicularium is larger, the spines are 

 wanting, and the ovicell is somewhat deeper. A round avicularium 

 only occurs in a few 3I-: mbra n ip •:• r-y. , such as 31. eramtixarginata, H., 

 31. lineata. IManzoni iBry. of Castrocaro. p. 11, pi. i. fig. 6), 

 31. flustroid.rs. H. 



A specimen from Xapier has the cells, in part of the colony, very 

 elongate, showing that 31. oralis. d'Orb., is only a modification of 

 this species. 



Loc. Atiocene : Austerlitz. IS'apier and Petane (JIT. Z.) ; Mt. 

 Gambier. 



7. AIemsea2tlpoba solid ttxa. Alder £ Hincks. ' 



Memhranipora solidA.a. Hincks. Proc. Dublin Univ. Zool. & Bot. 

 Assoc. li. pt. i. (1860) p. 75 : and Brit. Mar. Polyzoa, p. 158, pi. xx. 

 figs. 7, 8. 



Membra n xpora pap u lifer a . iTacG-illivray, Trans. Eoy. Soc. Yict. 

 vol. xviii. p. 116. 



Biflustra papA'rera. AlacGillivrav. Zool. of Victoria, decade xi. 

 p. 27, pL 106. fig. 9. 



A fossil from Shakespeare Cliff, growing on Enttdophora, has the 

 zooecia plain, suboval, with a thick crenulated border, and a globose 

 ovicell, which is shallow and smooth, with a strong thickened ridge 

 across the upper part. In size and structure of the ovicell this is 

 just the same as specimens from Hastings and Capri, but I do not 

 find any nodules. This, however, in several other species is not a 

 constant character. A specimen from YTaipukurau Gorge, which 

 was sent to me queried as 31. paptdifera, is of the same size as the 

 one from Shakespeare Cliff. 



Loc. Living : Antrim, Guernsey. Hastings (H.\ Capri {A. IE. J, 



