340 PROCEEDINGS OF THE NATIONAL MUSEUM Vol.89 



diameter, 4.5 mm. A complete specimen, U.S.N.M. No. 468839, 

 with the nucleus and 4.4 whorls, measures: Length, 10.8 mm.; greater 

 diameter, 7.0 mm.; lesser diameter, 6.0 mm. 



ANNULARIA (BLAESOSPIRA) ECHINUS LUCIFER, new subopecies 



Plate 39, Figure 4 



This subspecies comes from the Sierra del Infierno. It is a pale race, 

 quite slender, with strong digitations on the outer and basal lip and 

 feeble ones on the parietal lip. 



The type, U.S.N.M. No. 535591, has 2.1 whorls remaining and 

 measures: Length, 8.1 mm.; greater diameter, 7.0 mm.; lesser di- 

 ameter, 5.7 mm. 



ANNULARIA (BLAESOSPIRA) ECHINUS INFIERNALIS. new subspecies 



Plate 39, Figure 3 



This subspecies also comes from the Sierra del Infierno. It is a 

 buff-colored race with the digitation of the outer lip not strongly- 

 developed, while the digitation of the inner lip almost equals that of 

 the outer lip. 



The type, U.S.N.M. No. 535590, has 2.3 whorls rem.aining and 

 measures: Length, 7.5 mm.; greater diameter, 6.1 mm.; lesser di- 

 ameter, 4.0 mm. 



ANNULARIA (BLAESOSPIRA) ROCAI, new species 



Plate 39, Figure 5 



Shell of buff color, with all the postnuclear whorls solute. Nuclear 

 whorls decollated in all our specimens. Postnuclear whorls strongly 

 roimded, marked by distantly spaced, slender axial riblets, which 

 bear 3 long, laterally compressed, hollow spines on each turn between 

 the summit and the base. The intercostal spaces are marked by slen- 

 der axial hairlines. The parietal wall bears mere indications of feeble 

 spinules placed on the same axial element upon which the heavier 

 spines are placed on the spire. Here these lamellae are very poorly 

 developed, while the spaces between them are crossed by the same 

 threadlike elements described for the spire. Aperture circular; inner 

 peristome slightly solute and slightly reflected; the outer marked by 

 digitations of which the 3 on the outer lip are stronger than the rest. 

 There are 7 others covering the left basal portion, the inner and 

 parietal lip. These digitations are marked by feeble concentric 

 laminations. 



This species was collected by Father Roca at Sitio de la Sierra, 

 north side of Sierra de San Andres. We take pleasure in namhig this 

 for him. It is easily distinguished from the other species by the fact 

 that it has one less series of spines on the whorls. 



