VARICELLA, CARIBBEAN. 123 



larly sculptured with unequally spaced grooves, with occa- 

 sional varices preceded by brownish streaks. The later 

 whorls have some low fine ripples between the grooves. The 

 varices and outer lip are but very slightly arcuate. The 

 ground color is more or less distinctly yellow. A well grown 

 example measures, length 21.7, cliam. 6.2, aperture 7.5 mm., 

 whorls 8. 



A. nisei Pfr. was based, as Pfeiffer himself has stated, on 

 the same specimen earlier described as portoricensis. 



70. V. CORUSCA (Reeve). PL 11, fig. 56. 



"Shell 'pyramidal, somewhat fusiform, obtuse at the apex, 

 whorls seven in number, convex, smooth, polished, finely mar- 

 gined at the sutures, columella arched and twisted, aperture 

 ovate ; transparent brown, glassy, obscurely stained with 

 flexuous chestnut streaks." (Reeve}. 



Habitat unknown. 



Achatina corusca REEVE, Conch. Icon, v, pi. 22, f. 121 

 (March, 1850). 



"A shell of firm growth though transparent and glossy" 

 Pfeiffer, in the Nomenclator Heliceorum places this dubious 

 and ill-described form in Subulina, but it looks more like 

 Varicella impressa or V. portoricensis. The figure, copied 

 on plate 11, is stated to be "considerably magnified." 



Section Lccvaricella Pilsbry, n. sect. 



Varicellas without distinct grooves or stride between the 

 varices. Embryonic shell pupiform (except in V. glabra) , 

 of 3 to 3 1 /;? smooth whorls ; columella very concave and 

 abruptly truncate. Type V. semitarum. 

 I. Embryonic whorls forming a pupiform apex. 



a. Length of shell about 4 times that of the aperture; 

 pale greenish, yellowish or brownish, sometimes with 

 inconspicuous brown varix-streaks. 



I. 28x6.5 mm., whorls 10; Martinique. 



V. semitarum, no. 71. 

 ft 1 . 16x4 mm., whorls 7; Dominica. 



V. perlucens, no. 72. 



