316 PALiBONTOIOGT. 



Nicholson, Prof. H. A. Descriptions of species of Chcetetes from 

 the Lower Silurian Kocks of North America. Quart. Journ. Geol. 

 Soc. vol. XXX. pp. 499-515, pis. xxix. xxx. 



Discusses the affinities and value of the genera Stenojpora, Chcetetes, 

 and Monticulipora^ and concludes that the American corals usually 

 referred to Stenopora cannot be so placed, unless Lonsdale's definition 

 of the genus be extended and modified. Also concludes that the 

 distinctions between CTicetetes and Monticulipora are such as can hardly 

 be maintained, and therefore provisionally refers all the forms under 

 immediate consideration to the genus Chcetetes. Describes and figures 

 the following new forms, besides others previously described — 

 C. approocimatus, C. attritus, G. dedicatulus, C. (?) nodulosus, C. Jamesi, 

 C. rhombicus, C. corticans, and C. Ortoni. All the species occur in the 

 Cincinnati Group of Ohio ; and several of them are also found in the 

 Hudson-Eiver and Trenton Pormations of Canada. H. A. N. 



. Descriptions of New Possils from the Devonian Rocks of 



Canada West. Geol. Mag. dec. 2, vol. i. pp. 10-16, 54-60, 117- 

 126, 159-163, 197-201, pis. ii. iv. vi. ix. and 3 figs. 



Describes and figures a number of new species of corals, Polyzoa 

 and Brachiopoda, from the Devonian rocks of Western Ontario, pending 

 the publication of a complete report on the fossils of this formation. 

 The following are the species — Calloporaincrassata (C &1I.)^ Alveolites 

 frondosa (H.), A. Selwynii (C), A. (Coenites2) distans (C), A. con- 

 ferta (C), A. ramulosa (C), A. JBillingsi (C), Chcetetes moniliformis (H.), 

 C. Barrandi (H.), C. quadrangularis (H.), Heliophyllum suhccespitosum 

 (H.), H. proliferum (C), Productella Eriensis (C), Leiorhynchus Iluro- 

 iiensis (H.), Tceniopora exigua (H.), T. penniformis (H.), Ptilodictya 

 MeeJci (C. & H.), Claihropora intertexta (C.), Botryllopora socialis (H.), 

 Ceriopora (?) Hamiltonensis (H.), Polypora pulcliella (C), P. tenella (C), 

 P. tuherculata (H.) [this name must be abandoned, Prout having already 

 described a species under the title], Retepora Phillipsi (C), Fenestella 

 magnified (C), F. marginalis (C), F. filiformis (C), Spirorbis Arko7iensis 

 (H.), Ortonia intermedia (H.). [The letters C. and H. respectively 

 indicate occurrences in the Corniferous Limestone aud in the Hamilton 

 Formation.] Also comprises descriptions of all the genera quoted above, 

 including the two new genera Botryllopora and Tceniopora. H. A. N. 



. On Columnopora, a New Genus of Tabulate Corals. Geol. 



Mag. dec. 2, vol. i. pp. 253, 254 (with woodcut). 



Establishes this genus for the reception of a coral from the Hudson- 

 Eiver group of Canada and the Cincinnati group of Ohio. The coral- 

 lum is massive, aggregate, and composed of prismatic closely approxi- 

 mated corallites. It resembles Favosites in general form, but differs 

 in having a well-defined septal system, and in having the walls per- 

 forated by very large and close-set mural pores. It also resembles 

 Columnaria (Favistella), but differs in having the walls or the co- 

 rallites perforated by numerous mural pores. The only species known 

 is described under the name of Columnopora cribriformis. . H. A. N. 



