GRAF /U SOLMS-LAUBACH— MONOGliAPll OF THE ACETABULAlllE.*:. 36* 



Ostrea digltalina, Pectetf Gloria-marls^ Bryozoa and Serpul;x> in the ravine of Karanj, not 

 far from the Monastery of St. George, south of Sebastopol. 



3. AcicuLARiA MiocENiCA, Heuss, in Sitzber. d. k. Akad. d. Wissenscli., Math.-nai. CI. 



Bd. xliii. Abth. 1 (1861), p. 7, figs. 5-8 d. 



Spicula wedge-shaped, obtusely round at outer margin, pressed flat, consisting of two 

 layers of roundish spore-cavities ; spore-cavities on the two sides almost wliolly wanting, 

 surrounded hy a circular wall. 



In the Miocene beds of the district of Vienna (Nussdorf), in the Transylvanian Tegel 

 at Lapugy, in the Salzthon [Permian] of Wieliczka, abundantly in the Leitliakalk of 

 Kostel in Moravia. 



Tliis species is extremely like the recent A. Schenckii, but may be sufficiently distin- 

 guished from it by the more flatly compressed spicuhe and the almost total absence of 

 the open spore-cavities on sides of the partition-walls. 



4. AcicuLARiA PAVANTINA, d'Archiac, Description geologiquc du Departement de 



I'Aisne, Mem. de la Soc. geol. de Erance, vol. v. pt. ii. 1843, p. 386, t. 25. tig. 8. 



Spicula wedge-shaped, deeply emarginate in two lo])es at the outer edge, of round or 

 oval section : spore-cavities narrowing wedge-fashion towards the centre, opening out- 

 wards equally all round witliout a wall-like border. 



Michelin, Iconogr. zoophytologique, p. 176, t, 46. fig. 11 ; Reuss, loc. cit. figs. 1-4. 

 Ovulites JPavantina, d'Orbigny, Prodr. de Paleont. stratigraphique, ii. p. 405, no. 1292 ; 

 Pictet, Traite de Pal. edit. ii. vol. iv. p. 48 1; Bronn, Letha?a geognostica, ed. iii. 

 vol. iii. p. 259. 



In the Eocene of tlie Paris basin; Grobkalk [Middle Eocene] of Pisseloupe at Pnvant, 

 Etrechy at Etampes. 



In the characters described this species departs from tlie recent species much more 

 than^. miocenica. With reference to the peculiar pointed converging form of the spore- 

 cavities I am unable to express an opinion, since I have seen only one complete spicula. 

 in the possession of Prof. Steinmann, of Freiburg, and I have not seen cross fractures. 



Bibliography. 



o 



1. Agardh, J. G. — Till Algernes Systematik, viii. (Siphouese) : Lund's Univ. Arsskr. torn. xxui. (1886). 



2. Andrussow, Nic. — Eine fossile ^ce/flAM/arm als gesteinhildender Organismus : Ann. d. k.k. natur- 



histor. Hofmuseuras zu Wien, vol. ii. (1887) pp. 77 et seq. 



3. AsKENASY. — Ueber einigc australasische Meeresalgen : Flora, vol. Ixxviii. (1894) p. 5. 



4. Carpenter, W. B. — Introduction to the Study of the Foraminifera : Ray Soc. London (1862), p. 137 



et seq, t. xi. 



5. Cramer, C. — Ueber die verticillirten Siphoneen, besonders Neomeris und Cymopolia: Denkschr. d. 



Schweizer. natf. Gesellsch. in Zurich, vol. xxx. (1887). 



6. Cramer, C. — Ueber die verticillirten Siphoneen, besonders Xco/zirris mid Bometclla ■ il)id. vol. xxxii. 



(1890). 



f2 



