34G PROCEEDINGS OF THE NATIONAL. MUSEUM Vol.89 



extend over the umbilical wall. No spiral sculpture whatsoever is 

 present. Aperture broadly oval; peristome simple, except at the 

 posterior angle, where a shelf bridges across the slight auricle, which 

 suggests an inner peristome; the outer lip is moderately broadly ex- 

 panded, while the inner is narrow. Operculum almost subcircular, 

 with subcentral nucleus; the calcified, thin, but very broad lamella 

 rises slightly obliquely from the chondroid basal plate; this lamella is 

 marked by slightly curved incremental lines. 



The specimen described and figured, U.S.N.M. No. 355899, is one 

 received from Gundlach. It has 4..0 whorls and measures: Length, 

 7.1 mm.; greater diameter, 13.9 mm.; lesser diameter, 10.7 mm. 

 While this shell is marked "Cuba," it is more than probable that it 

 came from the type locality. 



Gundlach says of this species: (Malakazool. Blatter, vol. 5, p. 

 188; 1858): "On limestone cliffs in the Cafetal Santa Maria, District 

 Ramon (Oriente Province). Animal light gray with olive colored 

 sheen; small whitish dots form spots on the sides of the foot and almost 

 cover the neck. Tentacles white at the base, the rest ochre colored. 

 One can see the dark gray or marbled intestines shine through the 

 shell. While creeping, the shell is held almost horizontal." 



ANNULARIA (ANNULARISCA) PRESTONI Ramsden 



Plate 40, Figures 1-3 

 1914. Annularia eburnea prestoni Ramsden, Nautilus, vol. 28, p. 50. 



Shell depressed-helicoid, flesh colored, with livid blotches and areas, 

 and toward the aperture with a tinge of brown. The edge of the 

 peristome is white; behind the edge of the peristome, within the 

 aperture, there is a broad zone of chestnut brown, which gradually 

 fades backward. Nuclear whorls 1.5, small, well rounded, micro- 

 scopically granulose. Postnuclear whorls somewhat inflated, well 

 rounded, marked by retractively curved, slender axial riblets, which 

 gradually gain in strength as the shell increases in size. These riblets 

 are about as wide as the spaces that separate them, and they extend 

 over the strongly rounded periphery, base, and over the umbilical wall. 

 Base very broadly openly umbilicated, showing all the whorls within. 

 Aperture very broadly oval; peristome simple ?, the outer lip broadly 

 expanded,, forming an auricle at the posterior angle ; the inner lip very 

 narrow. There is a shelf which stretches across the base of the 

 auricle, leaving a free space behind, which might indicate a possible 

 double peristome. Operculum with almost central nucleus, and 

 broadly, obliquely flaring lamella, which is marked by fme recurved 

 threads. 



The specimen figured, U.S.N.M. No. 535601, a topotype, was col- 

 lected by Dr. Charles T. Ramsden on the Ojo de Agua Range, between 



