436 PROCEEDINGS OF THE NATIONAL MUSEUM VoL. 113 
than half the same length. Suture well defined but not deep, with a 
narrow zone clearer than the rest of the whorls which are pure white 
and almost polished, without any sculpture except some very faint 
lines of growth noticeable behind the reflexed lip. Protoconch with 
the sculpture of Drymaeus but very fine. Aperture large, with 
columellar lip very wide and vertical, forming an angle of 120° with 
the parietal wall; base of lip angulated at left, the outer lip continuing 
in a gradual curve to the superior end which is also angulated; the 
lip in allits perimeter is broad and expanded, clear cream colored. No 
callus between the ends of peristome. 
Holotype (USNM 98230) from Costa Rica, collected by José C. 
Zeledén (evidently prior to 1890). One paratype (USNM 621510). 
Another specimen (USNM 596732) was collected by A. Wetmore 
and W. M. Perrygo in March 1951 at Cerro Campana, Panama. 
The three specimens measure (in mm.): 
Height Diameter Last whorl Aperture 
Holotype 42. 5 22. 5 Shy 24x16. 5 
Paratype 40 22 29. 5 22x16 
Panama specimen 38. 5 21 28. 5 21. 5x16 
These specimens are larger than any of the varieties of Drymaeus 
josephus (Angas) with which the new species shows affinities; it would 
seem at first sight to be a giant shape of josephus, near the form con- 
color, but the proportions and form of the shell are quite different. 
Another species with which it may be related is Drymaeus latitesta 
Haas, but this is a Peruvian species, shorter and wider, and with a 
colored spiral band; the most noticeable affinity among the three 
species is the faint nepionic structure, which in other species of 
Drymaeus is more strongly pitted. 
The type lot was labelled by Dall as “Bulimus pallidior zeledoni 
Dail, Fig’d types.’’ This denomination must have been prior to the 
description of B. (Leptobyrsus) zeledoni Dall (=Drymaeus josephus, 
after Pilsbry), and the specimens remained with the label without 
correction. These are, of course, not the types of that species, for 
the true types of zeledoni Dall, cited in the original description (Proc. 
U.S. Nat. Mus., vol. 16, p. 644, 1893) as USNM 98231, are in the 
collection labelled as types. D. megastomus differs markedly from 
Dall’s species, which is a synonym of D. josephus concolor Martens. 
Drymaeus waldoschmitti, new species 
PLATE 2, FIGURE 16 
Shell rimate, oval conic, shining, half as wide as the height, last 
whorl about three-fourths the height, and the penultimate one-sixth 
the total length. Five whorls very little convex, the last with a 
median and very low carina which continues the line of the suture 
