PALEONTOLOGY. 281 



Streblotri/pa mul1porata,\t. 87, pi. xiv, 1". IL 



Strebloi) 1/2)11 utriata, p. a7, pi. xiv, f. 12, 12a. 



Styehlotri/pa rcyularia, p. 88, pi. xiv, f. 14. 



Streblotrypa ('/ Leiochma) denticulata, p. 88, pi. xiv, f. 18, 19. 



Bhomhopora ohioeimis, p. 90, pi. xiv, f. 4. 



Charles R. Keyes has added three papers (134, 13G, 141) to the litera- 

 ture of the Carboniferous. In the first, on tlie fauna of the Lower Coal 

 Measures, three new species are described : 



Chonetes l(Bvi8, p. [8] 229, pi. xii, f. 3, a, b. 

 Plcurotomaria modesta, p. [17] 238, pi. xii, f. 2, a, b. 

 Macrocheil U8 humilis, p. [18] 239, pi. xii, f. 1. 



F. A. Sampson (229) describes the Subcarboniferous series at Se- 

 dalia, Missouri, and Lieut. A. W. Vodges (251) describes two new spe- 

 cies from the same : 



Phillipsia sampsoni, pp. 248, 249, aucl two wood-cuts, p. 249. 

 Gi'iffithidcs (?) sedaUensis, p. 249. 



In another paper (250) Lieutenant Vodges reviews the genera and 

 species of North American Trilobites; the following four genera are 

 recognized: Proetus, Steininger; Fhillipsia., Portlock ; Grlffithides, 

 Portlock, and BrachymetopsiSj McCoy. The author gives a diagnosis 

 of each genus and discusses the various species and synonymy, with 

 their distribution in North America. The original description of the 

 species is given in many cases, with a careful specific diagnosis for each 

 species. Six species of Proctus, twelve species of Phillipsia, five species 

 of Griffith ides, and one species of Brachymetopsis are recognized. The 

 generic characters are illustrated in the plates. 



THE MESOZOIO. 



William B. Clark (27) finds evidence in the fossils discovered in Anne 

 Arundel and Prince George Counties, Maryland, to establish the per- 

 sistence of the Cretaceous strata across the State, from the Delaware 

 line on the northeast to the Potomac River on the southwest, and lists 

 of the species with localities are given. The same author (24) remarks 

 upon the discovery of an Arcestes (n. sp.), Arcestcs rhceticus, p. 119, 

 figured in a former paper (25), in the Rhoitic beds of the northern 

 Tyrol. This is taken as evidence for regarding tlie Rhietic as more 

 closely allied with the Trias than with the Lias. The same author (2G) 

 presents lists of species collected from several localities in the southern 

 counties of Maryland, representing the Eocene and Miocene faunas ; 

 no new species are described. 



R. T. Hill has published three papers (108, 109, 110) of considerable 

 value in expounding the knowledge of the geology of Texas, particu- 

 larly of the Cretaceous system. The paper (110) on the Geology of 

 the Cross-timbers contains a table (i)p. 298-299) of a geological section 

 of the Cretaceous across the State of Texas, in which are indicated the 

 characteristic fossils of each zone. In another paper (109), on the 



