Uccaiional Papers of the Museum of Zoology 31 



Potcria tninsliicida traiislitcida ( Sowerby, 1843). 



One almo-t adult shell and 5 young specimens from near 

 the Rio (Jropito, at the edge of the Cerritos de las Brujas 

 (II, I, be. 39), appear to be quite close to this typical form. 

 They are light-colored, comparatively fine-textured shells. 

 Measurements of similar shells from Cucuta, Colombia (L 8, 

 y^; A. N. S. P. 12963), from Puerto Cabello. Venezuela 

 (A. X. S. P. 12961 ; C. F. Starke), and from La Guaira, 

 Venezuela (A. N. S. P. 12986) are also given (see fig. v-A). 

 This sul)species appears to be characteristic of the lowlands; 

 in the mountains, the species is represented by various, close- 

 ly related forms. /'. traiislitcida frinitensis (Guppy) has sim- 

 ilar dimensions. Ijut most of the specimens can be separated 

 ])}' the kev (see l)elow). The measurements of a characteristic 

 example of each sex (see fig. v-B, C) from Cariaquito. Vene- 

 zuela (L 10. O3 ; A. N. S. P. 104631 ; Bond Expedition, 191 1), 

 are given. In all of the subspecies, the adults examined have 

 close to 4^2 whorls. 



Diuicnsioiis of Potcria transhicida 



Height Maj Diam. 



P. t. transliiridd 16.0 127 (20.4) Figure, Thesaurus. 



Young shell 12.2 121 (14.8) H, I, c, 39; La Fria, Yen. 



A. N. S. P. 12963 12.6 131 (16.5) Cucuta, Colombia. 



12961 12.8 127 (16.2) Puerto Cabello, Yen. 



14.5 130 (18.8) 



i29<S6 (Fig. v-A) 16.0 133 (21.2) La Guaira, Yen. 



P. t. Iriiiitciisis {F\gi.\-B,C) 13.8 130 (17.9) Male ; Cariaquito, A'en. 



A. N. S. P. 104631 16.9 122 (20.5) Female; ditto. 



/'. /. hrjiiiiicnsis (Fig. v-D ) 17.2 105 (18.1) H, L b. 7 ; type ; Bejuma, Yen. 



14.8 117 (17.3) 



(Fig.v-E) 14.3 1^8 (18.3) 



(Fig. v-F) 12.0 118 (14.2) 



(Fig. v-G) 17.3 118 (20.4) H, L<-', 15; CerroChiriguara. 



Means: 34 specimens 14.9 117 (i7-5) 



Extremes: ditto 12.0-17.3 105-128 (14.2-20.4) 



