153 



2208 Holospira cionella 



Ft. Bowie, Arizona (J. H. Ferris). 



2209 Holospira regis 

 Sierra Co., N. M. 



2210 Holospira chiricahuana 



Cave creek, Chiricahua Mts., Ariz. (J. H. Ferris). 



2211 Holospira tantalus 



New Mexico or Arizona (Edward Palmer). 



2212 Myoforeeps aristatus Dillwyn. 



"My friend, F. W. Kelsey, of San Diego, Cal., recently sent 

 me a peculiar Lithophagus, taken near that city, which I at once 

 recognized as a Myoforeeps, and Dr. Dall afterwards kindly deter- 

 mined the species as M. aristatus Dillwyn. The finding of this 

 interesting species, with its elongate, crossed ends, in shell ground 

 which has been well worked for so many years, is worthy of note 

 and to the credit of the enthusiastic collector named. The fact 

 that mature specimens are found imbedded in hard rock is proof 

 that it is not of very recent introduction." — Fred L. Button, Nau- 

 tilus 13:131. March 1900. 



2213 Pupa calamitosa Pilsbry, Phila ac pr 1889 411, t 12, f 

 16-17. 



Shell cylindrical, very blunt at apex, chestnut colored; whorls 

 iy 2 , the first 1% smooth, the following regularly costulate striate, 

 the costulae separated by spaces wider than themselves; last whorl 

 abruptly turning forward, rounded beneath, encircled by a slight 

 central constriction or furrow; aperture about 1-3 the total length 

 of shell, rounded, truncated above, contracted within; peristome 

 thin, expanded, without crest or callous thickening behind; colu- 

 mellar margin rather dilated; parietal wall bearing 2 entering 

 lamellae, 1 arising near the termination of the outer lip, the other 

 more deeply seated, elevated, entering less obliquely; columella 

 with a strong white deep-seated obliquely entering fold; outer lip 

 with 2 short white lamellae. Altitude 1.7, diameter .8 mm. Near 

 the mouth of the Santo Tomas river, Lower California, collected 

 by Henry Hemphill; and near San Diego, Cal., by Orcutt. 



2214 Vitriuella williamsoni Dall. 



"Shell small, white, with 2y 2 whorls; spire flattened; suture 

 appressed with a shallow channel or excavation outside of the 

 appressed margin of the whorl, outside of which the convexity of 

 the whorl rises higher than the suture. Base slightly more round- 

 ed than the upper side, with a wide and flaring umbilicus; per- 

 iphery rounded; aperture rounded, oblique; surface polished, 

 finely striate here and there by the incremental lines which are 

 most prominent above. Maximum diameter of shell, 5.5; mini- 

 mum diameter, 4.5; altitude 1.25 mm. Beach at San Pedro, Cal.; 

 U. S. National Museum, registered number 106,855. This species, 

 which is rather large for a Vitrinella, is respectfully dedicated to 

 Mrs. M. Burton Williamson, to whose researches this paper is due. 

 The name being inherently masculine, the usual genitive ending is 

 preserved." — Dall, U S Nt Mu, pr, 15:202, t 21, f 2-3 (2 Ag 1892). 



2215 Acmaea morchii 



"Shell conical, much elevated, with a sub-central recurved 

 apex resembling that of Helcion pectinatus covered with close-set, 

 rough, imbricated ribs and riblets, the coarse, imbricated, sharp 

 lines of growth forming with the other sculpture a close reticula- 

 tion in some specimens. Interior with a brown-mottled spectrum 



