1915. J NATURAL SCIENCES OF PHILADELPHIA. 329 



anatomical characters, which, though not great, seem to be constant 

 in a considerable number examined, and which favor the more 

 analytical treatment of the hachitana group effected by Dr. Bartsch, 

 ^a view I formerly opposed. After examining many fresh specimen? 

 from both ranges, I separate the Florida and Hacheta Sonorellas 

 subspecifically. 



Whether the typical form of S. hachitana occurs outside of the 

 Big Hachet range is doubtful. The Peloncillo range Sonorella 

 {S. h. peloncillensis) is not easily distinguishable by the shell alone, 

 but the proportions of the genitalia differ. 



On the Carrizolillo Mts., top of two peaks near the boundary 

 line, numerous "bones" were collected by Dr. Mearns (No. 126,596, 

 U. S. N. M.). They agree with S. hachitana in the rather wide 

 umbilicus, small aperture and deeply descending last whorl, but 

 differ by the average smaller size, from alt. 10.8, diam. 19.3 mm., to 

 alt. 12.4, cUam. 21.4 mm. It is apparently a small race of hachitana^ 

 The locality is about 30 miles east of Big Hachet Mountain. 



Specimens reported as S. hachitana from the Chiricahua Mountains 

 will doubtless turn out to be one of the species already described 

 from there. Several resemble hachitani more or less in the shell, 

 but all differ in genitalia. 



The specimen reported from the Santa Rita Mountains (No. 

 105,385, U. S. N. M.) is dead and broken. It is not hachitana, but 

 probably an undescribed species near S. clappi P. & F. 



Ashmunella mearnsii (Dall). Plate V, figs, l to 16. 



Polygijm mearnsii Dall, Proc. U. S. Nat. Mus., XVIII, p. 2, 1895; XIX, 

 p. .343, PI. 32, figs. 7, 8, 11, 1896. 



Up to this time A. mearnsii has been known from the original lot 



collected by Dr. Mearns about twenty years ago.*^ We found it 



^The figured type of A. mearnsii and nine specimens in various conditions 

 of perfection are Cat. No. 130,012, U. S. N. M., said to be from the Huachuca 

 Mts. In the adult shells of this lot the parietal wall of the aperture is built up 

 and disjoined from the preceding whorl. In another lot, No. 130,013, U. S. N. M., 

 three specimens, Hacheta Grande Mt., the parietal caUus is appressed. This 

 diiTerence in the parietal callus is exactly what we have noticed between the 

 specimens from our Station 5 (near Dr. ]Mearns's camp site) and those from 

 our Stations 10 and 11, near and at the top of Hacheta Grande Mt., a place 

 also visited by Dr. Mearns. We conclude, therefore, that there was a mistake 

 of "Huachuca" for "Hacheta" in the label of No. 130,012; and that A. mearnsii 

 does not really live in the Huachucas. This seems the more likely because in 

 several camping trips to the Huachucas this species was not found. 



A record of .4. mearnsi from the Organ Mountains, N. M., has been published, 

 on the authority of Professor Cockerell. We have not seen the specimen, but 

 suspect that they are A. kochi Clapp. 



We suggest that our Station .5 in the Hacheta Mountains be accepted as type 

 locality for .4. mearnsi. 



