INVEETEBIL\-TA. 301 



the Cretaceous rocks there are 55 species, belonging to 25 genera. Of the 

 Jurassic species Hemicidaris Leymeriei and Cyphosoma supracorallinum 

 are new. Of the Cretaceous species, Echinoconus Icaunensis is new. In 

 conclusion, the author treats briefly of the genera land stratigraphical 

 relations of the species catalogued. H. A. N. 



Cottean, G., A. Peron, and V. Gauthier. Echinides fossiles de 



I'Algerie, .... description des especes deja recueillies dans ce pays, et 



considerations sur leur position stratigraphique. [Algerian Fossil 



Echinoids.] Ann. Sci. Geol. t. vi. livr. 2, pp. 90 ; woodcuts and 



8 plates. 



The stratigraphical information is by M. Peron. In part 1, describes 



the U. Tithonic beds with T. janitor ; these are considered decidedly 



Cretaceous, but it is noted that the Echini have Jurassic affinities : 



7 species are cited, the following being new : — Infrachjpeus Thelebensis 



(n. gen.), Holtctypus aftr^ llhaldocidaris janitoris, Magnotia Meslti. 



In part 2, the Neocomian beds are dealt with ; from them are the new 



species : — Echinospatangus subcavatus, E. Africcuius, E. Villei, Pygnrus 



eurypneustes, P. impar^ Bothriopygus Meslei, B. Trapeti, Echinohrissus 



humilis, E. Durandi, E. Sthaensis^ Echinoconus JSoubdellensis, Bhahdoci- 



dai-is Durandi, Acrosalenia miranda^ Hemicidaris Meslei^ Pseudodiadtma 



AnoueJense, Codiopsis Meslei. E. B. T. 



Credner, G. R. Ceratites fastigiatus und Salenia teccana. Zeitsch, 

 gesammt. Nat. Bd. xii. pp. 105-116, plate 5. 



A description of 2 new species. Ceratites fastigiatus^ from the upper 

 Muschelkalk, Thiiringer Haus, Gotha, is compared in a detailed table 

 with Ceratites nodosus. Salenia texana^ from the Cretaceous (?) of Texas, 

 is compared in a similar table with Salenia Prestensis. E. T. N. 



Crosse, H. Sur les caractcres de I'opercule dans le genre Neritopsis 



[Characters of the operculum of Nerito2:)sis.'] Journ. Conchyl. pp. 



57-66. 



Certain irregularly discoidal bodies found in the Lias have much 



perplexed geologists. In 1858 MM. Deslongchamps described them 



under the name of Peltarion, and hazarded the conjecture that they 



were parts of Cephalopoda. M. Quenstedt thought that they might be 



Brachioptoda. Mr. Moore made one the type of his Chiton radiatum. 



In 1868 M. J. Beaudouin found two casts of Neritopsis, with Peltaria 



in the aperture ; and the discovery of veiy slightly different opercula in 



recent species of Neritopsis may now be considered to have conclusively 



proved that these bodies are the opercula of species of Neritopsis. 



C. P. G. 



. Description du nouveau genre BertheUnia. [New Genus 



Berthelinia.] Journ. Conchyl. pp. 79-81 ; pi. 2, fig. 3. 

 This genus is proposed for a microscopical shell, ^ millimetre long, 

 from the lower Calcaire grossier of Courtagnon, apparently allied to 

 Pileo2)sis and Hiitponyx, One species, B. eleganSj is described. 



C. P. G. 



