ANCEY ; ON THE GENUS ASHMUNELLA. 79 



from Cloudcroft, Sacramento Mountains, New Mexico. 

 Edentata. — Lacking, like the following, the parietal tooth, shell horn- 

 colour or pale greyish-brown. 



Rufescens. — Shell deep ferruginous or chestnut colour, lip tinged with 

 pink. 

 Alba. — Shell creamy white. The first albino reported in Aslnmmella. 



The present paper was written and ready for publication, when 

 another form of A. tliomsoniana was discovered and described as fol- 

 lows by T. D. A. Cockerell :* 



^'AsJnnunella thomsoniana cooperae, n. var. — Shell with max. diam, 

 from 13 to 15 millim., but usually of the smaller size; basal tooth 

 single, occasionally slightly double ; umbilicus narrower than in the 

 type or var. porterae, exposing less of the penultimate whorl ; genitalia 

 as in porterae, with the same long (22 mm.) spermoetheca, and double 

 insertion of the penis retractor. 



Hah. — Las Vegas Hot Springs, 1900, 1901. Discovered by Miss 

 Mary Cooper ; later taken in quantity by Miss Cooper and Miss Maud 

 Ellis. The locality is in the Transition Zone, at about 7,000 feet 

 altitude; porterae belongs to the Canadian Zone, about 1,000 feet 

 higher. This is not a very distinct form, conchologically ; but it is 

 worth calling attention to as a species of Aslimundia in the marking, 

 probably derived from the jjoj'^'errte form rather than from the true 

 tliomsoniana.^' 



I can add nothing to this, the form now being unknown to me. 



ANATOMICAL NOTES, 



By R. MURDOCH. 

 Ashmunella pseudodonta (Daii). 



(PI. vii, figs. I — 7.) 



The specimens from which the following notes are taken were collected 

 by the Rev. E. H. Ashmun, and received in alcohol in a good state 

 of preservation. The locality given is White Oaks, New Mexico, at 

 an altitude of 7,500 feet. 



External Features. 



The upper surface is covered with fine granules, somewhat irregu- 

 larly arranged and darkish in colour. The foot-sole is whitish and 

 rounded above. There are no pedal grooves. The mantle has an 



4 Op. c, 1901 (July), vol. xv, p. 35. 



