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Actaeon lawsoni Weaver. Platae 17, figure 2. 

 Bullinula subglobosa Weaver. Plate 17, figure 3. 

 Binginella pinguis Gabb. Plate 17, figures 4a, 4b. 

 Aturia mathewsonii Gabb. Plate 18, figure 1. 



All the species figured were obtained from the Martinez Group. 

 Several of Gabb's genera are not in accord with present usage, but 

 they have been retained in this paper in those cases where the correct 

 genus was uncertain. 



APPENDIX 



LIST OF LOCALITIES* 



65. Concord Quadrangle. Martinez Group. Alhambra Valley. On ridge just 

 east of point where Arroyo del Hambre turns to the north, two and one- 

 quarter miles south of Muir Station. J. C. M. Loc. 65. Concord Sheet. 

 150. See 340. 



243. Concord Quadrangle. Martinez Group. Same as 500 and 544. One and 



three-fourths miles due south of Muir Station. 

 267. Concord Quadrangle. Martinez Group. One-sixteenth mile north from 



Arroyo del Hambre. Two miles south 30 degrees west of Muir Station. 



J. C. M. Loc. 267. 



337. Concord Quadrangle. One and one-quarter miles southeast of Muir 



Station. On hillside northeast side of Martinez-Walnut Creek road, 



75 feet above road. J. C. M. Loc. 337. 

 340. Mount Diablo Quadrangle. Summer School, 1911. Martinez Group. 



SE % of NE % Sec. 4, B. 1 W, T. 1 S, Mount Diablo Sheet. 

 333. Concord Quadrangle. Martinez Group. Two and one-quarter miles south, 



10 degrees west of Muir Station. J. C. M. Loc. 333. 

 500. Same as 243 and 544. See Loc. 243. 



501 = 213. Concord Quadrangle. Martinez Group. Two and one-eighth miles 

 southeast of Muir Station on the southwest side of Martinez-Walnut 

 Creek road, about one and one-half miles northwest of Grayson 's 

 Creek, on side of hill near top, a little to north of Locality 343 but on 

 same hill. J. C. M. Loc. 501 = 213. Concord Sheet. 



532. Concord Quadrangle. Eocene. One and three-eighths miles southeast of 

 Muir Station. Across road from 541, on side of hill. J. C. M. Loc. 532. 



541. Concord Quadrangle. On south side of road a little over one and three- 

 eighths miles southeast of Muir Station. J. C. M. Loc. 541. Concord 

 Sheet. 



544. See 243. 



* The initials, J. C. M. refer to the collections of J. C. Merriam, and E. E. D. 

 to those of E. E. Dickerson. 



