Pulmonifera of Maine, 



29 



tinct and not so closely arranged. The strise are very marked 

 and prominent in both species ; in P. pygmsea however they are 

 wider ajDart and more regularly disposed. 



I can see no resemblance between this shell and S. labyrinthica 

 which Lea mentions, though it resembles somewhat the young of 

 the latter species viewed from the apex. A magnified view bears 

 more resemblance to Helix solitaria. Since writing the above I 

 have had an opportunity of examining Moquin Tandon, and find 

 the jaw of P. pygmaea as figured by him generically distinct. 



SUCCININ^. 



Succinea Totteniana, Lea. 



Abundant in all parts of the State, in fields and in woods : have 

 met with it in numbers in the middle of roads, and on railway 

 tracks in the early part of the day. In a visit to Aroostook we 

 met with this species at all the landings on Penobscot ]\iver, and 

 at all places on the route to Fort Kent, where we found it in 

 abundance. 



Buccal plate, {Firi. 73,) strongly arcuate, maroon 

 color, cutting edge having three folds. Attached 

 to the convex margin is a large quadrangular piece 

 extending posteriorly , allowing a greater support for 

 the attachment of muscles which move the plate. 



Lingual membrane, 100-33-1-33. Plates long, nar- 

 row, sides parallel, central plate tridentate, middle 

 denticle long, slender, laterals bidentate, similar in 

 shape to central, uncini tridentate, denticles short. 

 (PI. 9, Fig. 74.; 



Succinea avara, Say. 



Not a common species, but when met with, generally found 

 in plenty. 



Buccal plate, (Fig. 75,) broad, narrow, strongly 

 arcuate, having one central projection on its cutting 

 edge, and a slight depression on its inferior edge. 



Lingual membrane having thirty -nine plates in a row, 

 central plate broad, square, having one long and two 

 short denticles, laterals seven, longer than broad, angular, Fig. 75. 



