62 University of Michigan 



Measurements 

 Shell Aperture Operculum Whorld 



alt. maj.diain. min.diam. alt. diam. long wide 

 male 



(type) 13.9 72(10.0) 54(7.5) 57(7.9) 94(7.4) 34(4.7) 79(3.7) 4 

 female 16.5 66(10.8) 54(8.9) 49(8.0) 96(7.7) 32(5.3) 79(4.2) 41/2 



C3. Frequent (44 specimens). Type lot (see Table VI); bleached 

 and dull-colored. 



CI. Infrequent (25 specimens). Lighter ground color and brighter 

 spiral bands. This lot does not appear to approach T. pilsiryi any 

 closer than does that from C3. 



Tudora pilshryi H. Burrington Baker 

 (1924; Naut., XXXVII, 94) 



Type locality: (C2a) at base of northern cliffs of the Taf el- 

 berg of Santa Barbara, southern Curasao. 



Distribution : Curagao ; only collected near the base of the 

 escarpments on the northern and western sides of the Tafel- 

 berg (C2). Quite common; under limestone rocks, in crevices 

 of the talus, and buried deeply in the soil ; a few on the trunks 

 of the larger trees ; a distinctly terrestrial species. 195 speci- 

 mens collected. 



Shell (fig. xiii-F) : subacuminate, obovate-conic ; much 

 thinner and more depressed than megacheilos, but extremely 

 variable in dimensions. Color: vivid lemon-yellow to bright 

 salmon and dark plum-colored ; usually uniform, but some 

 of the lighter shells show darker, spiral bands of variable 

 width, while others show darker varices ; sculpture white ; 

 eroded apex and apical plug usually much darker, but of 

 similar color to the remainder of the shell. "Whorls: about 

 7, of which 3I/2 are usually retained ; very convexly rounded 

 and with very deeply impressed sutures ; last whorls increas- 

 ing more rapidly in diameter than the subacuminate, earlier 

 ones, although, as in many species with a sealariform tendency, 

 this character is very variable. Sculpture of last whorl (fig. 

 x-39) : regular, compressed growth-riblets, which are quite 

 closely spaced but are narrower than their interspaces ; spiral 



