I»» 



The Nautilus. 



Vol. XX. APRIL, 1907. No. 12. 



NOTES ON SOME NEW MEXICAN ASHMUNELLAS 



BT H. A. PILSBRT AND JAS. H. FEKKISS. 



Since the publication of the results of our work on Asbmunella 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 no! afraid <>t hard work, and who get live 

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

 absolutely essential, however, to gel 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 rhyssa townsenoi (Bartsch). Plate VIII, figs. 1, 2. 



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

 (Aug. 6, 1904). 



Ashmunella rhyssa tow?ise>idi Bartsch, Pilsbry. Proc. A. N. S., 

 Phila., 1905, p. 231. 



This race differ? from A. r. mlorhyssa chiefly by its strongly- 

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

 more depressed and more openly umbilicate. Three of the original 

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



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

 223-253. 



