214 AMERldAN JOURNAL 



smoky-black like ours. The jaw is strongly arched, with eight 

 broad ribs.f 



Very thin and nearly smooth ones have been found near An- 

 tioch, at the junction of the San Joaquin and Sacramento rivers, 

 with Arionta ramentosa, the most eastern point for both. 



Some found near San Francisco have a parietal tooth, but the 

 lip and umbilicus are so unlike the next that they are easily 

 distinguished. 



A. ? germanus, Gld. (Cp.) A few typical specimens have 

 been found lately by Harford and Dunn, near the Columbia 

 river. 



Triodopsisloricata, Gld. Harford and Dunn found large ones 

 at Clark's Ranch, Mariposa Co., 4000 feet alt., thus extending 

 its southern range in the Sierra Nevada to lat. 38° 30', the same 

 as on the coast. 



Mr. C. ]). Voy has connected its range in the two mountain 

 chains by discovering it at Shasta City, lat. 40° 37', on the 

 Sacramento river, which may be one locality of its discovery by 

 the U. S. Expl. Exped. as given by Gould. The northern and 

 eastern form is, however, much larger than the type, and this 

 probably came from S. F. Bay, the same place as Lecontii of 

 Lea, so that it is scarcely allowable to use this for the small form 

 only. 



DiEDALOCHEILA. 



One perfect dead specimen, and one immature, but living, 

 found by Harford and Dunn " at the Big Trees of Fresno Co.," 

 5000 to (?000 feet above the sea, are the foundation for adding 

 another genus to our fauna, as well as a new species. It is 

 nearest allied to D. Behrii, Gabb, of Guaymas, but differs from 

 that and most others in its perspective umbilicus, and in the want 

 of pits over the labial teeth. In form, size and umbilicus it 

 closely resembles th(! polygyrella of Montana, thus curiously 

 connecting that anomalous species with Dcedalocheila. (See des- 

 cription of D. Harfordiana, this Journal, p. 196. 



I). ? 'polygyrella^ Bid. (Cp.) In the Synopsis I placed this in 

 '■'■ Helicodiscu8 f on account of its internal teeth, but the pre- 

 ceding species suggests an idea that it is really a northern type 

 of the same genus, in which the labial teeth have been " swal- 

 lowed." Mr. Bland mentions one specimen in which the first 



t Among those figured iu Binney and Bland's " Geophila," it is between 

 that of "if. [Polygyra) ventrosula" and "jET. [Stenotrema] monodon," those 

 of Mesodon all having 10 to 16 ribs. 



