112 GULICKIA. 



Genus GULICKIA Cooke, n. gen. 



The shells are sinistral, minutely perforate in the adult 

 stage. Embryonic whorls spirally striate. Parietal lamella 

 oblique. Columella slightly sigmoid, furnished with two al- 

 most equal, rather strong, oblique folds. Peristome thin, un- 

 expanded. Animal oviparous. Type, G. alexandri. 



This genus is intermediate between Auriculella, Tornatel- 

 lides and Tornatellaria. It is probably most closely related 

 to AuriculeUa, from which it differs by the striate embryonic 

 whorl, fragile outer lip and the subequal columellar lamellae. 



In form, size and the strong oblique parietal lamella it ap- 

 proaches some of the species of Tornatellides. It is related to 

 Tornatellaria by its spirally striate embryonic whorls and ovi- 

 parous reproduction. The position and form of the colu- 

 mellar folds and also the closed umbilicus of immature speci- 

 mens places Gulickia very close to Auriculella, but in Auricu- 

 lella mature shells have a slightly or much thickened peri- 

 stome. In Gulickia, the peristome is thin, as in Tornatellina. 

 This and some of the Auriculellae are the only sinistral Ha- 

 waiian species of Tornatellinidce. In immature specimens the 

 oblique upper columellar fold extends to form the margin of 

 the columella. The genus is dedicated to John T. Gulick. 



1. G. ALEXANDRI Cooke, n. sp. PI. 28, fig. 7. 



Shell sinistral, minutely perforate, acutely conical, turrited, 

 corneous, thin, subdiaphanous, shining, nearly smooth, min- 

 utely striate with lines of growth. Spire conic, apex some- 

 what obtuse, embryonic whorls minutely spirally striate. Su- 

 ture simple, slightly impressed. Whorls 6%, slightly convex, 

 slowly increasing, compressed, the upper convex, the last 

 somewhat rotund, slightly angular at its beginning, convex 

 at the base. Aperture somewhat oblique, ovate. Parietal 

 lamella quite strong, very oblique, arcuate, minutely and ir- 

 regularly serrate. Columella nearly straight, slightly sig- 

 moid (in immature specimens), narrowly triangular, with 

 two well-developed oblique lamellae. Peristome simple, thin, 

 unexpanded, the outer margin arcuate. Length 3.5, diam. 1.7, 

 axis of apert, 1.3 mm. Parietal lamella 0.22 mm. in height. 



