77^ 



64 H '-^Vv^^.^:^^v^v.^5^. ^^^^^-e^^^^ ■ 



66 i^. stagnali^. sp. 3. 



67 jST» fragiiis. sp pliir. 



68 palustris. sp. unic, 



69 iS^. peregra. sp. unic, 



70 i/. putris^ sp. plur. . 



71 II. acuta. sp. 2. 



^72 £f, detrita. sp. plur. 



a. — Var. sinistra. sp. unic. 



73 ff^ ?» praecedenti affinis sed major, fas» 



ciis fuscis» Schr(3ter Erd.Concliyl. tflb^ 



I. fig. 1. sp. 2. 

 74. 11, ?. cornea, subtiliter striata, apertura 



suboyata, Ex insul. St, Crucis. 6p. 3. 



