66 University of Micliigaii 



Shell (figs. xii-I) : slightly larger and considerably heavier 

 than typical fossor. Ground color: bleached; white to light 

 pinkish ; spiral bands absent or present, entire or with blotches 

 united to form bands parallel to the growth line ; eroded apex 

 and apical plug light buff, to orange and deep indigo. Whorls : 

 about 3% retained. Sculpture : similar to fossor throughout, 

 but heavier and with comparatively less prominent cusps; 

 spiral ridges usually less crowded on sides of last whorl. Aper- 

 ture : internally light orange to light chocolate ; usually darker, 

 spiral bands can be seen. Peristome : more extensively but 

 less abruptly expanded than in fossor; internal callus much 

 heavier, continuous. Other characters as in fossor. 



Measurements 

 Shell Aperture Operculum Wliorls 



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

 male 13.7 63( 8.6) 50(6.8) 48(6.6) 88(5.8) 35(4.8) 79(3.8) 3% 

 female 



(type) 18.0 62(11.2) 48(8.7) 45(8.0) 93(7.4) 32(5.8) 76(4.3) 4.^2 

 C8 

 (male) 14.7 60 ( 8.8) 48(7.0) 47(6.9) 91(6.3) lacking 41/2 



C17bc. Quite infrequent (58 specimens collected). Type lot (see 

 Chart VII). 



C17a. Quite infrequent, on top of Seroe Djerimi (42 specimens). 

 Typical. 



C16. Infrequent (23 specimens). A little larger than the typical lot. 



C15. Infrequent; accidentally mixed with a lot from the eastern es- 

 carpment of Seroe Djerimi (C15 and C17a; 57 specimens). Like C16. 



C14. Very infrequent (17 specimens). Rather large. 



C13. Quite rare (10 specimens). Smaller, but otherwise typical. 



Tudora fossor westpuntensis, new subspecies 



Type locality: (C18) small limestone remnant, less than a 

 kilometer north of Plaja Abau, northern Curasao. 



Distribution: Curagao; limestone rim north of Plaja Abau 

 (C18, 19). Under limestone rocks, and, during rains, on bases 

 of vegetation; almost completely terrestrial. 252 specimens 

 collected. 



Shell (fig. xiii-H) : females about as large as males of 

 fossor. Ground color: light buff to pink, orange and light 



