Pulmonifera of Maine. 63 



PLATE II. 



Magnified views of the exterior sxirfaces of the shells of the 

 following species. 



Fig. 1 — Punctum minutissimum, Lea. 

 a. section of same. 



Fig. 2 — Stenotrema monodon, Rackett. 



Fig. 3 — Helicodiscus lineata, Say. 



Fig. 4 — Conulus chersina, Say, 



Fig. 5 — Planogyra asteriscus, Morse. 



Fig. 6 — Patula striatella, Anthony. 



Fig. 7 — Striatura milium, Morse. 



Fig. 8 — Paeiidohyalina exigua, Stimpson. 



Fig. 9 — Hyalina Binneyana, Morse. 



Fig. 10 — Striatura ferrea, Morse. 



Fig. 11 — Hyalina indentata, Say. 



Fig. 12 — Strobila labyrinthica. Say. 



a. upper portion of Avhorl. 

 h. lower portion of whorl. 



