182 PROCEEDINGS OF THE CALIFORNIA 



shell was hirsute, was founded upon the cicatrices observed upon the surface, Mr. 

 Gabb, who has recently returned from a trip to Mariposa, was successful in find- 

 ing a few specimens, by which tbe diagnosis may be enlarged, and conjecture re- 

 solved into certainty. The whole surface is covered with an epidermis, of a yel- 

 lowish brown colour, thickly studded with slightly curved rigid hairs about one- 

 twentieth of an inch in length. The animal is of a reddish brown color, with the 

 tentacles of a smokv hue ; tentacular sheaths darker than the body, which is 

 small, slender, finely granulated and unusually loug and tapering behind. 



The shell bears the same relations to H. Dupetit Thouarsi, Deshayes, that Helix 

 infumata, Gould, bear to H.Jidelis, Gray. In the description of infumata, au 

 important omission occurs, owing doubtless to the imperfect condition of the type 

 specimen. In good specimens, all of the last whirl, except a circle round the 

 umbilicus, is covered with very short and thickly studded soft hairS, feeling harsb 

 when dry, but velvety to the touch when moistened. 



Achatinella Alexandri, Newc. 



Ach. testa perforata, sinistrorsa, elongato sub-cylindracea, nitida, rufo-brun- 

 nea, nigro-elongato-venulato-inosculante picta ; anfr. VI convexis, regulariter 

 accrescentibus ; apice obtusiusculo ; sutura modice impressa, non einarginata ; 

 apertura parva, sub-ovata ; labro acuto ; columella alba breve, sub-recta, truucata, 

 infra in plicam tortam terminante. 



Long. -6 pol., Diam. -25 pol., Aper. long. *2 pol. "1 lata. 



Hab. Insula Sandwich, (Maui). 



Shell perforated, left handed, elongately sub-cylindrical, shining, reddish-brown, 

 with painting of elongate, inosculating black veins ; whirls six convex, regularly 

 (but slowly) increasing ; apex a little obtuse ; suture moderately impressed, not 

 emarginate ; aperture small, sub-ovate ; lip acute ; columella white, short, almost 

 straight, truncate, terminating by a twisted plait passing within. 



This species is more cylindrical than any of its congeners, resembling most A. 

 Renyi, Newc, which is longer, not umbilicate, more pointed at the apex, with a 

 twisted, not truncate columella. 



From venusta and citrina, Mighels, it varies both in form and color. With 

 some varieties of picta it claims analogy only in the general plan of painting 

 Its striking characteristics are its blunt apex, slightly rounded whorls, small aper- 

 ture, short and white columella, umbilicus, and general plan of coloring. 



A few specimens were collected at an elevation of 7,500 feet, on West Maui, 

 by the Rev. M. Alexander, to whom the species is dedicated. 



Description of New Species of Marine Shells front tlte 



Const of California. 



BY WM. M. GABB. 



The following are a few of the shells collected by Dr. J. G. Cooper, of the 

 State Geological Survey, during his explorations along the coast of this State. 



