312 E. Billmgs on some of the 



is impossible to say positively whetlier or not they belong to that 

 species. The Calciferous sandrock in some places is full of con- 

 cretions, which being composed of concentric layers, present on 

 weathered surfaces an appearance almost exactly like that of S. 

 rugosa, and therefore it may be that the specimens in question 

 have nothing organic in their character. No other indications of 

 Bryozoa were seen. 



Brachiopoda. — Camerella calcifera is the most abundant 

 species. There are five species of Ortliis all undescribed ; one 

 much resembles 0. parva, (Pander,) and another is very like the 

 small variety of 0. caUigramma, figured in Siluria, 3rd ed., p. 

 53, fig. 12. All of these species occur in the limestones at Point 

 Levi, and one C. calcifera is found also in the Calciferous sand- 

 rock at St. Timothy and Edwardsburgh. No other Brachiopoda 

 were found. 



Lamellibranchiata. — No species of this order were found. 



Gasteropoda. — The most abundant species are 3Iaclurea 

 matutina, (Hall,) Ophileta sordida, (Hall, sp.) 0. levata and 0. 

 complanata, (Vanuxem.) I am under the impression that the 

 three latter constitute but one species. In the same beds we find 

 numerous examples agreeing with all the figures given by Hall 

 and Vanuxem, and it appears to me that 0. levata is simply two 

 or three of the inner whorls of 0. complanata ; and that 0. sor- 

 dida is the same seen in section in the rock. We traced these 

 fossils through a thickness of 270 feet in a continuous section. 

 They are more abundant in the upper than in the lower strata of 

 the section. Associated with the above are Ecculiomphahis 

 Canadensis, E. intortus and E. spiralis ; five species of Pleuro- 

 tomaria ; three of Murcliisonia ; two of Holopea and two of 

 Capulus.^ One of the species of Holopea appears to be H, 

 dilucula, (Hall.) Both of them and also E. Canadensis and E, 

 intortus occur in the limestone at Point Levi. These fossils 

 abound in several ridges of limestone about a mile east of Phil- 

 lipsburgh, north of the road leading to Freligsburgh. Maclurea 

 magna or a closely allied species, occurs in immense numbers in 

 several exposures of limestone five or six miles further north in 



*In my paper on the Point Levi fossils in this Journal, vol. 5, p. 301, 

 I referred several species of this tribe to the genus Patella. But since 

 then I see that Barrande' places similar species in Capulus. " See Fauna 

 primordiale dans la chaine cantabrique." Bui. Geo. Soc, France, 2nd 

 series, vol. 17, p. 516. 



