129 [Perkins. 



Pseudohyalina Morse, 1864. 



Pseudohyalina exigua Morse, Journ. Port. Soc. Nat. Hist., 

 Vol. i, p. 16. Helix exigua Stimps., Proc. Bost. Soc. Nat. Hist, 

 Vol. in, p. 175; Morse, Am. Nat., Vol. i, p. 543, fig. 34. 



Collected at Stony Creek by Prof. Verrill. Rare. 



Pseudohyalina minuseula Morse, Journ. Port. Soc. Nat. Hist., 

 Vol. i, p. 16. Helix minuseula Binney, Bost. Journ. Nat. Hist., 

 Vol. in, p. 435; Morse, Am. Nat., Vol. I, p. 543, fig. 35. 



Rare. 



Vallonia Risso, 1826. 



Vallonia minuta Morse, Journ. Port. Soc. Nat. Hist., Vol. i, p. 



21. Helix minuta Say, Am. Conch., pp. 7, 10, 21, 1817; Morse, 

 Am. Nat., Vol. I, p. 544, fig. 39. 



Common about the roots of elms on the College grounds. 



Strobila Morse, 1864. 



Strobila labyrinthica Morse, Journ. Port. Soc. Nat. Hist., 

 Vol. i, p. 26. Helix labyrinthica Say, Am. Conch., pp. 7, 10, 21, 

 1817; Gould, Invert. Mass., p. 184, fig. 106; Morse, Am. Nat, Vol. 

 i, p. 545, figs. 41, 42. 



Helicodiscus Morse, 1864. 



Helieodiscus lineata Morse, Journ. Port. Soc. Nat. Hist,, Vol. 



I, p. 25. Helix lineata Say, Am. Conch., pp. 7, 9, 24, 1817; Gould, 

 Invert. Mass., p. 179, fig. 103; Morse, Am. Nat, Vol. i, p. 546, 

 fig. 44. 



Common under stones in moist woods on West Rock. 



Succinea Drap., 1801. 



Suceinea avara Say, Am. Conch., p. 32, pi. Ixxiv, fig. 6, 1824; 

 Gould, Invert. Mass., p. 196, fig. 127; Morse, Am. Nat, VoL l, p. 

 607, fig. 47. 



Common in moist places. 



Suceinea ovalis Say, Am. Conch., pp. 7, 8, 22, 1817; Gould, 

 Invert. Mass., p. 194, fig. 125; Morse, Am. Nat, Vol. i, p. 607, 

 fig. 48. Succinea obliqua Say (not Gould), Am. Conch., p. 32. 



Not uncommon. 



PROCEEDINGS B. S. N. H.— VOL. XIII. 9 NOVEMBER, 1869. 



