OF CONCHOLOGY. 217 



the Colorado desert, there is a large tertiary fossiliferous de- 

 posit, and I have suspected that members of the Mexican Bound- 

 ary Survey may have found either fresh or fossil specimens 

 there of H. Pandorce (Damascenus, Gld.,) " from desert east 

 of California," and perhaps Bulimus excelsus, Gld. ("Califor- 

 nia, Maj. Rich.") and others of the peninsular group. I have 

 myself been unable to visit that locality and have heard of no 

 late collector who has. I could find no traces of land shells 

 between these mountains and the Colorado valley, which is 

 mostly a desert and granitic region, nor on their eastern slope 

 between San Francisquito and Tejon passes, latitude 35°. Dr. 

 Horn, U. S. A., informed me, however, that he found Pupse near 

 the summit of the last pass,* which he sent to Philadelphia in 

 alcohol. These may be the two credited to " Fort Grant, Ari- 

 zona," viz. : Arizonensis and hordacea, Gabb. (See Am. Jour. 

 Conch., ii. 331 and iii. 305.) 



At Fort Grant Dr. Horn also found the Patula ? ffornit, 

 Gabbf (which Mr. Tryon puts in Hyalina, although it is neither 

 vitreous, shining, smooth nor translucent), the only known 

 locality. He also found P. minuscula, (extending to Texas, 

 the West Indies and all the United States), Anguispira strigosa, 

 Gld., which extends thence northward to latitude 49° in the 

 Rocky Mountains, a distance of over 1,000 miles north and 

 south, but found neither H. Roivelli nor H. Pandorce, both re- 

 ported from "Arizona." Mr. Bland also mentions Ang.Cooperi, 

 W. G. B., Ang. strigosa, Gld., as found near the same part of 

 Arizona by Dr. Newberry. These have the same range north- 

 ward, but the Cooperi seems to occur on the eastern slope of the 

 mountains most abundantly, although reported from " Washing- 

 ton County, Utah," by Mr. Bland. (See Gabb in Jour. Conch, 

 ii, 330, and Newcomb, i, 349. Also Bland and Cooper in Ann. 

 N. Y. Lyceum, vii, 1861, as quoted hereafter.) 



Islands off Californian coast. — -The four islands off the coast 

 between the latitudes of San Diego and San Pedro are interest- 

 ing on account of their richness in land shells compared with 

 the adjacent main land. San Clemente (not " Clementine ") 

 Island, latitude 33°, lies nearly as far south as San Diego, and 

 not " off Santa Barbara" (Newcomb), the latter town being 



* Dr. Horn informs me that this is a mistake ; he found no Pupse in 

 this entire region. He collected Physa, Pisidium, Amnicola and Helix 

 Traskii in and about Fort Tejon. — W. M. Gabb. 



f Helix Hornii is, in some respects, allied to the Europeau genus 

 Hygromia, and in other particulars it approaches to Hyalina. It cer- 

 tainly is not a Patula, in my estimation. — G. W. Tryon, Jr. 



