246 LYROPUPA. 



rather obliquely seated. In most of Ancey's specimens the 

 peristome is continuous, the portion which is appressed to the 

 penultimate whorl being very thin. The lower palatal fold 

 is shorter than the upper and penetrates inward beyond it. 

 Length 2.45, diam. 1.5 mm. The original account follows of 



LYROPUPA STRIATULA (Pease). "Shell cylindrical, oblong, 

 somewhat solid, sinistral, umbilicate, longitudinally obliquely 

 and flexuously strongly costate, with the interstices delicately 

 transversely striate; whorls 5, rotundly convex, frequently 

 rotund-angulate in the middle, the last scarcely extended, con- 

 centrically broadly sulcate at its middle, rotund-angulate 

 about the umbilicus, compressed at the base; apex obtuse; 

 suture well impressed ; aperture subquadrangular, rotund at 

 base, contracted by 3 lamellae, 2 on the parietal wall, the first 

 [angular] large, united with the lip, the second median in- 

 ternal; one on the superior portion of the columellar margin, 

 attached to the labium ; peristome continuous, somewhat thick- 

 ened, slightly expanded and reflexed, the outer lip posteriorly 

 sinuous; reddish chestnut, with whitish ribs. 



' ' Length 2.5, diam. 1.5 mm. ' ' (Pease ) . 



Hawaii (Pease). 



Vertigo striatula PEASE, Proc. Zool. Soc., London, 1871, 

 p. 461. 



The type of this species is not to be found in Pease's collec- 

 tion in the Museum of Comparative Zoology. Pease men- 

 tioned 3 lamellae, 2 on the parietal wall and 1 columellar 

 lamella joined to the labium, that is, the inner lip ; implying 

 that none were seen within the outer lip. As no known 

 Hawaiian Pupillid has this structure, we assume that for the 

 moment he forgot that the shell was sinistral, and the phrase 

 "in margine columellari superne [lamella] 1 ad labium 

 juncta" really applies to the outer lip and its upper palatal 

 fold. It is quite natural that Pease, a careless observer, over- 

 looked the real columellar lamella and the lower palatal fold, 

 as these are deeply immersed. This hypothesis makes the 

 description intelligible, and increases the probability that 

 -strmtula is identical with L. clathratula. Since the point can- 

 not be demonstrated beyond doubt, we think it best to ignore 

 V. striatulci as a lost species unless new evidence is found. 



