WEST COAST PULMONATA. 497 



WEST COAST PULMONATA; FOSSIL AND LIVING. 



BY J. G. COOPER, M.D. 



(Continued from page 376.*) 



Santa Clara County. 



The eastern half of this county, forming part of the Mount 

 Hamilton range, has been sufficiently alluded to, and the 

 mountainous corner of it in the map is only about half of 

 that part of the range included in the county, while the 

 same unproductive and lofty region extends nearly 200 miles 

 toward the southeast. 



The westerly side of the county is shown to be formed by 

 the eastern slope of the Santa Cruz Mountains from near 

 the head of San Francisco Bay and Black Mountain south- 

 east to Pajaro River, thus enclosing Santa Clara Valley, a 

 triangular space of about 200 square miles, little above the 

 sea level. This valley, like the eastern shore of the bay, 

 is supplied with species washed down by the mountain 

 streams, but as far as known only by those from the west. 

 In certain moist shady spots near the streams draining it, 

 several species could formerly be found quite plentifully, but 

 as these willow groves, etc., have been mostly cleared for gar- 

 dens, few remain. I have thus found in the valley Nos. 1, 

 5, 11, 26, 30, 31, 32, 33, 35, iO, 42, 43, some of them hid- 

 den under logs, brush, etc., in the partial shade of the oaks, 

 which formerly covered about half the drier parts of the 

 valley. These are part of what I give in the table on page 

 367, as found south of the bay, and the rest naturally follow 

 here. 



* Errata, p. 374, line 14 from bottom, for 27U read 210. 

 The reader will observe that throughout I have used *' Helix " in a gen- 

 eral way for " Helicoid species," especially Nos. 26 to 39, in table on p. 367. 



35— Bull. CAl. Acad. Sci. U. 8. Issued August 25, 1887. 



