248 L c u c k a r t : B ericht über die Leistungen in der Naturgeschichte 



ceous. Septal orifice at the extremity of the shell, single, irregulär 

 in size and form. (Von Groniia I)uj. besonders durch die sandige 

 Beschaffenheit der Schale verschieden.) 



Palelliim. Shell free, conical, trochoid, crenulated on its en- 

 tire Upper surface, commencing its growth as an undivided spiral or- 

 ganism, but soon depeloping crescentic segnients, each of which oc- 

 cupies rather more than half the circumference of the shell. Seg- 

 ments arranged in two opposed alternating series. Internal cavities 

 of the Segments nari ow, crescentic ; divided into numerous quadran- 

 gular conipartments by small calcareous septa prolonged froni the 

 peripheral margin and reaching nearly to the umbilical border, 

 where these conipartments are connected together by a narrow un- 

 divided area. Calcareous layers extending from the inferior umbi- 

 lical borders of the segments combine to fill up the concave infe- 

 rior lateral surface of the shell. Septal aperture uncertain. 



Ehren berg charakterisirt (Berl. Monatsber. 1858. 

 S. 14 fF.) folgende neue Polythalamien des Mittelmeeres: 



Aristeropora (n.gen.) (jvaeca, Ä. stichopora. A. micropora, 

 Ar i s t er s p ir a (n. gen.) alloderma , A.? alma, A. Amathiae , A. 

 glohularia, A. haloplea , A. isoderma, A. laevigata , A. melo, A. me- 

 diterranea, A. Menipeae, A. platypora, A. spnrsa, A. trematophaena, 

 A' undnlata, Aspidospira depressa, Bilocvlina aegaea, Calcarina ari- 

 steropora , C er a t spiruli na (n. gen.) Sprattii , Cristellaria ro- 

 strat a , Encoryciiim (n. gen.) nodosaria , E. terehra, Grammosto- 

 mum Amphiroae , Gr. Aristotelis , G. astifjma, G. Cerberi, G. areni- 

 cola , G. depressnm . G. liltorale. G. Fonti, G. siihstrialiim , G.? 

 Thoae, Guttulhm? (an n. gen. Cimeli divm) Homeri, G. armata, No- 

 nionina fitsca, N. graeca, Planulina? Crisiae, PL? Cymodoceae, PI. 

 Euridices , PI. Forbesii , PL? fttsca , PL granvlata, PL holoplea, PL 

 mesolia, PL Orci, PL spongiartim^ PolymorpJiina Aristophanis, Poly- 

 spira Forbesii, P. Naxi , P. osctdata, Pylodexia pusilla, P.? tetra- 

 trias QuinquelociiLma? hirudo , llolalia abyssorwn , R. bractea , B. 

 cretica, P,. incerta, E. infernalis, S elc7io s l omum (n.gen.) aegaeum, 

 S' fimbriatum, SpirolocuUna tubu , Sp. ßexiiosa , Trilocnlina aegaea, 

 Vaginvia irregiilaris. 



Aristeropora n. gen. E. familia Rotalinoruni Turbinoidi- 

 bus. Spira in sinistro latcre aperta, in dextio obtecta, sinistro latere 

 poris pertuso, dextro imperforato. (= Porospirae sinistrorsum spirales.) 



Aristerospira. E fam. llotalinorum , sect. Turbinoidiim . 

 Spiia in sinistro lateie aperta, in dextia obtecta, ufroque latere poris 

 pertuso. (= rianuliuae sinistrosum spirales.) 



C er al spi r ul i ua. E i'licatilium fam. Characteres Quinque- 



