"Notes on certain Terrestrial Mollusca. 169 



of specimens were found under dry cowdung, about the edge of 

 a swamp, by Mr. Richard H. Stretch. 



Remarks. — This species has some slight affinity with S. avara 

 Say, but is, form alone considered, more closely allied to S. 

 infiata Lea, and S. campestris Say, from both of which, how- 

 ever, it may readily be distinguished by its size, texture, and 

 color. In one of my specimens of S. Stretchiana the apex has 

 a reddish tinge. 



Siiccinea Verrilli, nov. sp. 



T. ovato-conica, tenuis, striata, subpellucida, aurantiaco-succinea ; spira 

 elevata, obtusa, apice globoso, rubello ; anfr. 3 perconvexi ; sutura pro- 

 funda; apertura obliqua, rotundato-ovalis, columella arcuata, leviter 

 callosa; perist. simplex, marginibus callo tenuissimo juuctis. 



Shell ovate-conic, thin, striate, subpellucid, orange-yellow 



fig. 17. colored ; spire elevated, obtuse, with globose apex, of 

 A A a reddish tinge ; whorls 3, very convex ; suture deep ; 

 ^ y? aperture oblique, roundly oval; columella arcuate, 



Bland. with a slight callus ; perist. simple, the margins 

 joined with a very thin callus. 



Long. 7, diam. 3£ mill. ; Ap. 4 mill, longa, medio 3 lata ; 

 anfr. ult. fere 6 mill, longus. 



Habitat. — Salt Lake, Anticosti Island, Gulf of St. Lawrence, 

 N. Amer. A. E. Yerrill, Professor of Zoology, Yale College, 

 New Haven. 



Remarks. — This species is closely allied to S. Groenlandica 

 Beck, found by Prof. Yerrill on Mingan Island, but is smaller, 

 of different color, and has more distinct and regular incre- 

 mental striae. 



I am indebted for specimens, and also for the following notes 

 on the buccal plate and lingual dentition of S. Verrilli, to E. 

 S. Morse. 



