20 Lower Californian Shells. [zoe 



from H. carpenieri, and extends from Trinidad, lat. 28° 45', on 

 west coast, to Muleje, lat. 26° 52, on east, also "Guaymas, So- 

 nora, Mex.," Gabb. The Mexican form is, however, different, and 

 is Tryon's type, while the peninsula shells are probably all carpen- 

 teri. 



24. H. TUDICULATA Binney, 1843. Not far south of the bound- 

 ary line, Omitt. North to lat. 37", in Sierra Nevada. " Petaluma, 

 California," Sthnpson, (Gould) is an error in identification. 



25. H. (VANCOUVERENSIS Lea, 1839), var. sportella Gould, 

 1846. Near the boundary line, Orcutt. Those found near San 

 Diego seem to me as near the typical Oregon shell of Lea. H. 

 vellicata Forbes " Panama," seems externally very similar, and is 

 united with it by Binney. Not being confirmed from Panama, it 

 forms another proof of the errors in localities due to Kellett and 

 Wood. Mr. Hemphill has lately described the smaller form found 

 south to Ensenada as var. iransfuga. 



26. Limax HEMPHiLLi W. G. B., 1890. San Diego Mountains 

 to San Tomas, lat. 31° 35', Hemphill (and to lat. 31°? Orctitt). 

 This is the species mentioned by me in the Proc. Gal. Acad. Sci., 

 2dser., I, p. 13, 1887, at bottom, as perhaps L. agresiis Linn. In 

 the "4th Supplement to 5th vol. Terr. Moll.," January, 1892, Mr. 

 Binney now states that this species is found from British Columbia 

 to Lower California, having been confounded, in some cases, with 

 L. ca7npestris. An extreme southern form has also been named 

 var. piciiis by Cockerell. Ayiadeniis cockerilli Hemphill, another 

 slug allied to the northern Ariolimax, discovered on the San Diego 

 Mountains just north of the boundary, may extend southward. 



27. LiMNOPHYSA HUMiLis Say, 1822. Ensenada, lat. ■^\ 51', 

 Orcuti. Also found in nearly all the United States (and Europe?). 



28. Physa gabbi Tryon, 1863. Found near middle of west 

 coast of peninsula, Bryant, thence north throughout southern 

 half of California. By many called a var. of P. heterostropha Say, 

 1817. 



29. P. diaphana Tryon, 1865. In brook at San Jos6 del Cabo, 

 Bryant. Has same range northward. 



P. elata Gould, described as from " Lower California, Maj. Rich," 

 was doubtless from Mazatlan only, as given in Carpenter's^Catal. 

 The same applies to P. aurantia Carpenter. 



