PAGODULINA. 177 



"The shell is of the usual size, the rib-striation moderately 

 close above, much closer in the last half-whorl. Correspond- 

 ing to the long palatal fold there is a moderately deep im- 

 pression, and again one at the outer lip. Below the inner 

 end of the large palatal fold, which is very high and strong, 

 that is, between this palatal and the base, and opposite the 

 strong columellar lamella, there is a shorter but rather strong 

 fold, and a third fold above it somewhat deeper in the shell. 

 High above, near the suture, there is a very small but distinct 

 sutural fold. Besides these there are two lamellae deep within 

 on the parietal wall : one rather well developed in the middle, 

 slowly increasing and diminishing, and another narrow and 

 low, near the suture, both about y s of a whorl long, their 

 inner ends over the aperture. The palatal folds are visible 

 through the shell from the outside, but the shell must be 

 opened to learn their form and size, as well as to see the 

 parietals and the columellar fold. 



"In specimens [of Pagodnlina] from various places in the 

 Austrian Alps no trace of the above-mentioned lamellse and 

 folds were to be seen, either through the shell or in opened 

 shells. It must be mentioned that in our species the colu- 

 mellar lamella is spiral at first and then turns towards the 

 base, upon which, if strongly developed, it rests broadly" 

 {Sterki). [27th line, page 176, for 1899 read 1889.] 



2d. Pagodulina subdola gracilis (Boettger). PL 20, figs. 13, 

 14, 15. 



The shell is deeply rimate, cylindric, with obtuse, convexly- 

 conic summit, narrower than P. pagodula; wood-brown or 

 very pale brownish gray, the apex pale. Sculpture of very 

 close, irregular, microscopic pitting on the first V/ 2 whorls, 

 then well spaced, delicate, retractive riblets, about 7 or 8 in 

 one millimeter on the penult whorl, about 10 in one mm. on 

 the face of the last whorl ; on the last half -whorl the riblets 

 become vertical, and remain about as widely spaced as on the 

 front of the whorl. The whorls are moderately convex, the 

 last one ascending to about the middle of the penult, but 

 much less than in P. pagodula. The aperture is vertical, 

 trapezoidal with rounded base; peristome continuous, nar- 

 rowly reflected, thickened within, flesh-tinted. "Within the 

 first half of the last whorl there is the usual long upper-palatal 

 fold, a short lower-palatal below it; spiral and columellar 



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