KASTERiV PROVTXC^E SOTITHl]R\ RKGION SPECIES. 4.) ) 



amidst wbicb are imnierons fine, greeu lines; this shows the connec- 

 tion of the two first-named varieties; but such specimens are compara- 

 tively rare. On tbe other baud, specimens are much more common ex- 

 hibiting the broad brown bands or blotches upon the sni^erior part of 

 spire, while the last, and perhaps the penultimate, whorls are marked 

 with green lines alone. 



On Key Vaccas Mr. Hemphill found a beautiful variety, small, thick ; 

 four upper whorls white, with longitudinal dark chestnut blotches ; 

 lower three whorls very dark green, almost black, with white longitu- 

 dinal flammules and black revolving bands. 



The columella is sometimes prominently plaited and thickened, and 

 the peristome joins it at an obtuse angle, but it is never truly truncated. 

 In young shells there is a more near approach to a truncation, and a 

 distinct angle or carina may be noticed on the body- whorl. 



Jaw and lingual dentition : see pp. 430-432. 



The genitalia are figured by Leidy {I. c). The penis sac is long,^ 

 cylindrical, and strongly muscular; the vas deferens joins it near the 

 summit, and the retractor muscle, which is very lony, is inserted into 

 the latter; the oviduct is long, and its central part presents the pecul- 

 iarity of being colored brown; the genital bladder is ovate, situated 

 near the ovary, and its duct is narrow and as long as the oviduct; the 

 vagina is broad and muscular; at the base of the penis there opens a 

 short, cylindrical duct, derived from a single multifid vesicle, which 

 presents six or seven rounded or ovate divisions ; there is no dart sac. 



ORTHAJLICUS, Beck. 

 Animal : see below. .. .> ^ 



Shell imperforate, oVate or oblong, ornamented with often articulated 

 fillets; apex obtuse, last whorl inflated; columella uniforndy thick- 

 ened, sometimes callous, arcuate, obliquely subtruncate at base ; aper- 

 ture longitudinal, oval. 



The genus OrthaUcus does not properly belong to the fauna of North 

 America, but rather to that of tropical Aiherica, from whence speci- 

 mens have been introduced to the Florida mainland and keys and 

 Jamaica. In what manner it was introduced it is difficult to say (see 

 p. 37). 



Subgenus ORTHALICUS, Beck, s. str. 



Animal heliciform, large, scarcely included in the shell, long and 

 obtuse before, rapidly attenuated behind ; mantle posterior, slightly 



