LYROPUPA. 269 



formed; aperture obscurely trilobate, margin well reflected, 

 whitish; primary lamellae, except A and B, set rather more 

 deeply in the throat than usual. 



Formula ACE according to Dr. Sterki's arrangement. 

 The primary A [angular lamella] is stronger and more tri- 

 angular at the aperture than the others, but becomes a thin, 

 narrow, sharp lamella internally; the secondary 2 [parietal 

 lamella] does not come so near the aperture as A [angular 

 lamella ] , but further back is a little higher than the latter, and 

 the two run parallel like rails on a track, but somewhat irregu- 

 larly. From the aperture no lamella can be observed on the 

 pillar, but the primary C, [lower palatal fold] which fall* 

 short of reaching the margin and is comparatively weak to- 

 ward the aperture, in the depths of the throat, is higher and 

 stronger, forming a prominent, high, thin lamella. The pri- 

 mary E [upper palatal fold] is prominent at the angle of the 

 outer lip, and projects toward A [angular lamella] ; deeper 

 in it becomes lower and weaker, and still further in it projects 

 in a high triangular plate stronger than any of the others at 

 that depth. There are no indications of any other lamellae 

 or callosities. The margin of the aperture is set somewhat 

 obliquely to the axis (see fig. 16) . Max. Ion. of shell 1.75 ; max. 

 diam. 1.37 mm. Habitat, Cuba" (DalL). 



Vertigo cubana DALL, Proc. II. S. Nat. Mus. xiii, 1890, pi. 1, 

 figs. 1, 2. 



* ' A single specimen of this remarkable little species is in the 

 U. S. National Museum, mollusk register 87645. It was re- 

 ceived from the collection of the late Dr. Shurtleff, now be- 

 longing to Wesleyan University, Middletown, Conn., and was 

 obtained by him from the late Prof. C. B. Adams, or at least 

 still occupies the tiny glass tube, stopped with sealing-wax, in 

 which Professor Adams secured his minutiae, and a tiny label 

 on which is written "Pupa .... Cuba" in Professor Adams' 

 well-known chirography ' ' (DalL ) . 



There can be little doubt that the locality Cuba was an 

 error. Professor Adams received and described land shells 

 from the Hawaiian Islands, and as V. cubana differs very little 

 from L. thaumasia, a Hawaiian origin appears probably, al- 



