THE NAUTILUS. 



VOL. XX. APRIL, 19O7. No. 12. 



NOTES ON SOME NEW MEXICAN ASHMUNELLAS. 



BT H. A. PILSBRT AND JAS. H. FERRISS. 



Since the publication of the results of our work on Ashmunella in 

 1905, 1 various correspondents have contributed specimens which 

 throw light upon a number of dubious points relative to the group of 

 species inhabiting the Sierra Blanca and Sacramento ranges, in New 

 Mexico, east of the Rio Grande. 



There can be no doubt that a systematic campaign in this region 

 by collectors who are not afraid of hard work, and who get live 

 shells, would be well rewarded by a most interesting catch. It is 

 absolutely essential, however, to get to the mountain-tops, and to dig 

 deep in the rock-heaps. You will need a Ferriss hoe and stout 

 gloves, and you must forget fatigue. 



ASHMUNELLA RHTSSA TOWNSENPI (Bartsch). Plate VIII, figs. 1, 2. 



Ashmunella townsendi Bartsch. Smiths. Misc. Coll., xlvii, p. 13 

 (Aug. 6, 1904). 



Ashmunella rhyssa townsendi Bartsch, Pilsbry. Proc. A. N. S., 

 Phila., 1905, p. 231. 



This race differs from A. r. miorhyssa chiefly by its strongly- 

 ribbed surface, like A. altissinm, which, however, is far smaller, 

 more depressed and more openly umbilicate. Three of the original 

 lot of townsendi, taken by Prof. Townsend in the Sierra Blanca 



'Mollusca of the Southwestern States, Proc. A. N. S., Phila., 1905, pp. 

 223-253. 



