568 SCIENTIFIC RECORD FOR 1884. 



separate, or, in other words, where we have ten distinctly visible 

 openings, e. </., P. mels Owen & Shumard, and P. crenulatus Eoemer. 

 The third division comprises all species in which the deltoid pieces are 

 perforated, because the lancet pieces do not reach far enough to the 

 summit to enter into the composition of the spiracle openings, e. g., P. 

 norwoodi Owen & Shumard, and P. ellipticus Sowerby. The article is 

 illustrated by six figures in the text. 



Hambach, G. — Description of new Palaeozoic Echinodermata. (Trans. 



Acad. Sci. Saint Louis, vol. iv, No. 3, pp. 548-554, pis. O and D. Saint 



Louis, 1884.) 



The author describes the following new species from the subcarbon- 

 iferous limestones : Melonites crassus, M. irregularis, Oligoporus parvus, 

 Aroliceocidaris newberryi, Pentremites sampsoni, P. gemmiformis, Godo- 

 nites campanulatus. 



Heilprin, ANaELO. — North American Tertiary Ostreidae. Appendix I. 

 (White, 0. A. A Eeview of the Fossil Ostreidae of North America.) 

 N. B.— See Dr. C. A. White's work. 



Heilprin, Angelo. — On a Carboniferous Ammonite from Texas. (Proc. 

 Acad. Nat. Sci. Philadelphia, 1884, pp. 53-55, figs. 1 and 2, p. 53.) 

 Describes Ammonites Parlceri, considers it closely related to " Arcestes 

 antiquus^^ Waagen. It is associated with Zaphrentis, Phillipsia, Bel- 

 leropJwn, Gonularia^ CJionetes, and Productus. Professor Heilprin refers 

 this form to the "old genus Ammonites,''^ but as nearly as can be 

 judged from the figures and descriptions we w^ould place it in the genus 

 Popanoceras Hyatt, of which Arcestes antiquum Waagen is an extreme 

 form. 



Heilprin, Angelo. — Contributions to the Tertiary Geology and Palae- 

 ontology of the United States. Pp. 1-117. 4to. Philadelphia, 1884. 

 This paper contains discussions of the various Tertiary formations of 

 the United States, lists of fossils occurring therein, and a comparison of 

 some American and European forms, most of which have already been 

 published in substance in the Proc. of the Acad. Nat Sci. of Philadel- 

 X)hia. It is to be regretted that the book is not provided with an index, 

 «.ud that Mr. Heilprin has not given the names of the authors when cit- 

 ing species and giving lists of them. 



Hyatt, Alpheus. — Evolution of the Cephalopoda. (Science, vol. iii, 

 Nos. 52 and 53, pp. 122-127 and 145-149. Cambridge, 1884.) 

 An illustrated article containing in a condensed form Professor Hyatt's 



views on the subject. 



Hyatt, Alpheus. — The Protoconch of Cephalopoda. ( Amer. Natural- 

 ist, vol. XVIII, No. 9, pp. 919, 920. Philadelphia, 1884.) 

 Mr. Hyatt says that his observations establish the fact that in the 



