70 THE NAUTILUS. 



Dr. Newcomb failed to recognize the connecting link between 

 ramentosa and nickliniana. He says,- " Its nearest approach to any 

 described California species is to H. ramentosa Gld., which is much 

 smaller in size, more solid in structure, with a more depressed spire, 

 lighter color and more scaly granulations ; from H. nickliniana Lea 

 it is readily distinguished by its large umbilicus and difference in 

 form." 



Mr. Binney 2 placed it in the synonymy of ramentosa. 



EPIP. CALIFORNIENSIS, var. DIABLOENSIS J. G. C. 



This was another solitary dead shell, in the California State Col- 

 lection, which was supposed 3 to have been collected in the Mount 

 Diablo range by Prof. Brewer of the Geological Survey, who crossed 

 the range near New Idria, in lat. 36 30', a distance of about two 

 hundred miles south of Mount Diablo, which later writers have 

 given as the type locality of diabloensis. 



I fail to see anything in Cooper's description which in any way 

 shows an affinity with this group, and suspect that the specimen was 

 a form of trasM. I have traski from Coalinga, which is about 

 twenty miles south of New Idria, that fit the description very well. 

 The shell figured by Binney,* Fig. 113, seems to me to be identical 

 with the one figured as bridaesi, Fig. 109, and most certainly the 

 shells from the vicinity of Mount Diablo are not the diabloensis of 

 Cooper. 



A list of the principal synonymy follows: 



EPIP. CALIFORNIENSIS Lea. 



Helix californiensis Lea, Obs., II, 99, 1839. 



Helix vincta Val., Voy de la Venus, Moll. pi. I, fig. 2. 



EPIP. NICKLINIANA Lea. 



Helix nickliniana Lea, Obs., II, 100, 1839. 



Helix californiensis Reeve, Con. Icon., no. 66. 



Helix arboretorum Val., Voy de la Venus, pi. 1, fig. 3. 



1 Proc. Gal. Acad. Sci.. II, p. 91, 1861. 



2 Bull. 28, U. S. N. M., p. 133, 1885. 



3 J. G. Cooper, Proc. Cal. Acad. Sci.. Ill, p. 260, 1866. 



4 Bull. 28, U. S. N. M., p. 134. 1885. 



