218 PROCEEDINGS OF THE ACADEMY OF [Mcll., 



Holospira regis Pils. and Ckll., n. sp. PI. XXVI, tig. 7. 



Shell small, the lower half cylindric, upper half slowly tapering in a 

 long cone to the obtuse apex. Whorls 12f , all convex, the first two 

 smooth, the following whorls of the tapering portion of the spire rather 

 strongly, obliquely rib-striate, the riblets slightly narrower than their 

 interstices; the penultimate and next earlier whorls are more closely 

 and a little more finely sculptured, but on the last whorl the riblets 

 become stronger again. The last half of the last whorl is compressed 

 laterally, sloping to an almost subangulate but very obtuse base. 

 Near the end the whorl becomes free, descends a little, and is flattened 

 and excavated above. The aperture is obliquely piriform, its contour 

 being compressed near the upper outer angle. The peristome is free 

 throughout, expanded, the columellar and upper margins a little re- 

 flexed. The upper margin is a little dilated inwardly. The axis is 

 small and slender. Near the end of the penultimate whorl there is 

 a short, stout lamella on the axis near the basal wall. 



Length 10.8, diam. of cylindric portion 3.3 mm. 



Near Kingston, Sierra county, New Mexico. Type No. 87,208, 

 A. N. S. P., collected by Mr. O. B. Metcalfe. 



This species is about the size of H. chiricahuana , which, however, 

 differs in the less projecting last whorl, contracted behind the lip, and 

 in the smaller, differently shaped mouth. The more closely related H. 

 mearnsi is larger with more whorls, but it is not unlikely that specimens 

 intermediate in these respects will be found. Several broken shells of 

 H. regis indicate dimensions smaller than those of the type. 



Holospira cockerelli Dall. PI. XXVI, fig. 6. 



Holospira (Haplosiemma) cockerelli Dall, Nautilus, XI, p. 61, October, 1897. 

 Shell cylindric below, the upper half tapering in a long, very slowly 

 tapering cone to the obtuse apex. Whorls 13f , convex, the upper ones 

 more so. The first 2h form the smooth embryonic shell, the second of 

 them being wider and more swollen than the following one. Post-em- 

 bryonic whorls of the tapering spire rather strongly rib-striate, the rib- 

 lets oblique, narrower than the rather wide intervals. On the cylindric 

 portion the riblets weaken to irregular growth wrinkles, but the base 

 and the last half of the last whorl are strongly ribbed again. The last 

 whorl is well rounded below, projects forward but very shortly, and 

 descends to the mouth. The aperture is obliquely rounded-piriform, 

 produced at the upper outer angle. Lip well expanded, the columellar 

 and upper margins narrowly rcflexed. The axis is slender. There is 

 a low weak lamella on the axis in the last part of the penultimate whorl, 

 close to the basal wall . 



