188 PROCEEDINGS OF THE ACADEMY OP 



Sowb. and H. Pandorce, Forbes, than tliat of H. Calif orniensis, Lea, miercisa, nob. 

 and the shell before me. 



Helix Dupetithouarsi, Desh. In the collection of the Smithsonian Institute 

 there are specimens of this shell which are furnished with a delicate greenish 

 yellow epidermis. As this has never been noticed in descriptions, I believe it 

 must exist only on very fresh specimens, which are rarely seen. On being 

 immersed some minutes in water, the epidermis becomes of a bright golden 

 color. 



Helix labiosa. Gould, (by many considered identical with Columbiana, Lea.) 

 To Mr. J. H. Thomson I am also indebted for the following interesting notes on 

 this shell. It will be very important to dissect the animal, as it may prove 

 generically distinct from Helix. 



"Animal twice as long as the breadth of the shell, dark slate color, almost 

 black on the head and tentacles; a black line running along each side of the 

 back from the base of the longer tentacles; body covered with compressed 

 granules; tentacles black, acutely pointed : eyes at the base of superior tentacles ; 

 anatomy believed to resemble, somewhat, that of the Lyraniadse. Gregarious; 

 in its habits resembling Lymnaea, being found always near water, and laying 

 its eggs on the water-cresses and other aquatic plants. Arrives at maturity in 

 one year, one half the time required by the other species." 



Helix Californiensis, Lea. " Animal reddish grey, tentacles and base of 

 foot bluish; quite narrow in proportion to the length of the shell; tentacles 

 short. Gregarious, inhabiting dry gullies and hill sides ; many specimens found 

 in a cabbage garden." Thomson. 



Helix sportella, Gould. I am indebted to Mi-. Thomson for a fine specimen 

 of this rare species, the only one I have ever seen. His notes show the animal 

 to be quite distinct from that of H. concava, Say, however similar the shells may 

 be, with the exception of the striae on the Californian species. He writes, " Ani- 

 mal uniformly white or flesh colored, with an orange line on top of back. 

 Solitary — or only found in pairs." 



Helix loricata, Gould. (Lecontii, Lea.) This rare species also was added 

 to my collection through the liberality of Mr. Thomson. One specimen found 

 by him was very much larger than Dr. Gould's shell. He gives the following 

 description of the animal ; " white, linear, rough, posteriorly acute, tentacles 

 very short." 



BuLiMUS DoRMANi, n. s. Tcsta perforata, ovato-turrita, laevigata, albida, 

 fasciis fuscis longitudinalibus ornata; sutura impressa ; spira elongato-conica ; 

 acuta ; apex punctulata ; anfr. 6 convexiusculitis, lineis minutissimis volventibus 

 ornati, superi striati, ultimus inflatus, ad marginera superam peristomatis, ob- 

 tasissime carinatus ; apertura ovata, partem testee dimidiam sub;i5quans ; perist. 

 simplex, acutum, margine columellari reflexiusculum, perforationem pene oc- 

 cultans. Diam. 12; long. 29 mill. 



Habitat in peninsula Florida prope St. Augustine. 0. S. Dorraan ! 



Shell perforated, rather heavy, shining, elongated-conic ; white, with several 

 regular revolving series of interrupted perpendicular, reddish brown patches : 

 suture distinctly marked; apex punctured; whorls G, rather convex, marked 

 with numerous very fine revolving lines ; upper whorls striate ; last whorl full, 

 with a hardly perceptible obtuse carina at the upper extremity of the peristome. 



The only described species with which this shell can be confounded is B. 

 Floridianus, Pf., Proc. Zool. Soc, London, 1855, p. 330.^ Though I have never 

 seen Dr. Peiffer's shell, I should consider it nearly allied, though distinct. It 

 wants the minute revolving lines, the punctured apex, and striate upper whorls, 

 which cliaracterize B. Dormani, is a smaller shell, and has a different marking, 

 being furnished with opaque whitish blotches as well as reddish patches ; the 

 latter also do not extend to tiie body whorl. 



[October, 



