igoi] Ami — Book Notice, 191 



of Nat. History. These latter include fourteen species of fossils 

 belong^ing to the Trenton formation. 



The new species described are : i. Receptacitlites Pearyi, 

 Whitfield, Cape Bay, Princess Marie Bay, 1898. 2. Halysites 

 agglotneratiformis, Whitfield, Cape Harrison, Princess Marie Bay, 

 1898. 3. Calapoecia borealis, Whitfield, Cape Harrison, Princess 

 Marie Bay, 1898. 4. Helioliles perelegans, Whitfield, Cape Harri- 

 son, Princess Marie Bay, 1898. 



Of the above, R. Pearyi resembles R. 07veni, Hall, from the 

 Trenton (Galena) of Manitoba, and of Illinois, Wisconsin and 

 Iowa ; Halysites agglomeratiformis resembles H. agglomeratus 

 Hall, and Heliolites perelegans is related to H pyriformis. Prof. 

 Whitfield adds : " These specimens would indicate a geolog'ical 

 horizon about the same as that of the New York, Niagara or 

 Clinton group." 



H. M. A. 



BOOK NOTICE. 



The Paleozoic Faunas of Para, Brazil, i . The Silurian Fauna 

 of the Rio Trombetas. 2. The Devonian Mollusca of Para. 

 By J. M. Clarke, Archives do Museu Nacional do Rio de 

 Janeiro, Vol. 10, 127 pp., 1899. Author's English edition, 

 1900. 



I. The discovery of these fossils "was one of the results of an 

 expedition made under the direction ot the late Prof. Ch. Fred. 

 Hartt while Director of the Commissao Geologica do Brazil," 

 and they now form part of the palaeontological collections in the 

 Museu Nacional. Silurian rocks occupy a belt of country border- 

 ing the metamorphic region of Guiana, and are about 1,000 feet in 

 thickness. Amongst the interesting fossils described we note : 



1. Arthrophycus Harlani, Conrad, a very characteristic form 

 in the Medina (Silurian) of Grimsby and St. Catherines, Ontario. 



2. Lingula, cf. L. oblata. Hall, the latter a Clinton species 

 found in Ontario and also in New York State. 



3. Lingulops Derbyi, Clarke, a form related in many respects 

 to Lingulops Granti, Hall & Clarke, from the Niagara of Hamii- 



