166 THE CAMBRIAN. [bull. 81. 



From the collections made by the geologists of the Wheeler survey 

 west of the one hundredth meridian, Dr. 0. A. White describes, in a 

 preliminary report, Cruzianalinnarssoni, 0. rustica, Acrotreta f subsidua, 

 Trematis pannulus, and Agnostus interstricta. He also identified Hyo- 

 lithes primordialis Hall t; and published the manuscript description by 

 Mr. Meek of Olenellus gilberti and 0. huwelli. 1 From the strata re- 

 ferred to the age of the Quebec group he describes Acrotreta pyxidi- 

 cula (p. 9) and Bikelocephalus flagricaudus (p. 12). The former species 

 was subsequently identified by Mr. 0. D. Walcott as Acrotreta gemma 

 of the Upper Cambrian, and the latter species is referred to the Middle 

 Cambrian fauna as Zacanthoides flagricaudus. The manuscript descrip- 

 tions of Olenellus gilberti and 0. liowelli by Mr. Meek were also printed 

 in 1875 under the names of Olenus (Olenellus) gilberti and 0. (0.) howelli 

 in the report of Mr. G. K. Gilbert. 2 



The species described by Dr. White in his preliminary report of 1874 

 were redescribed and illustrated by him in 1875. In addition to the 

 species mentioned in the preliminary report he describes and illustrates 

 Concorypfie (Ptychoparia) Tcingi Meek (p. 40) and Asaphiscus wheeleri 

 Meek (p. 43.) 3 



The two species described by Mr. Meek from Antelope Spring, Utah, 

 in 1870, were redescribed and illustrated by him in 1877, under the 

 names of Conocoryphe (Ptychoparia) Mngi and Paradoxides f nevadensis. 

 In the description of the latter species he gave reasons for believing that 

 the generic reference was incorrect, and that the species belonged to an 

 undescribed genus. For this genus, if the species proved not to be 

 Paradoxides, he proposed the genus Olenoides. 4 



The description of the collections of the Fortieth Parallel Survey by 

 Messrs. Hall and Whitfield added a large number of new forms to the 

 Middle Cambrian fauna. 5 



The new species described are: 



Obolella discoidea, p. 205. 

 Lingulepis maera, p. 206. 



f mi nut a, p. 206. 

 Kutorgina minutissima, p. 207. 

 Leptaena melita, p. 208. 

 Crepicephalus (Logauellus) haguei, p. 210. 



(Loganellus) nitidus, p. 212. 



(Loganellus) granulosus, p. 214. 



(Loganellus) maculosus, p. 215. 



1 Preliminary report upon invertebrate fossils collected by tbe expeditions of 1871, 1872, and 1873, 

 with descriptions of new species, pp. 27. Geog. and GeoL Sar. west of 100th Mer., Lieut. Wheeler 

 in charge, Washington, 1874, pp. 4-12. 



'Report on the geology of portions of Nevada, Utah, California, and Arizona examined in the years 

 1871 and 1872 Report on Geog. and Geol. Expl. and Sur. west of 100th Mer., vol. 3, Geology, 1875, pp. 

 182, 183. 



3 Report upon the invertebrate fossils collected in portions of Nevada, Utah, Colorado, New Mexico, 

 and Arizona by parties of the expeditions of 1871-'74. Wheeler's Expl. and Sur. west of the 100th 

 Mer., vol. 4, pt. 1, 1875. 



«U. S. Geol. Expl. of the 40th Parallel, vol. 4, pt. 1, 1877, pp. 20-25. 



6 Ibid., vol. 4, 1877, pt 2, pp. 205-246. 



