330 



PROCEEDINGS OP THE ACADEMY OF 



The measurements above were all taken from one specimen ; they vary a 

 little, but the shape and proportions are very nearly alike in all the specimens 

 I have seen. 



Amorphozoa. 

 Eudea Lam. 



?E. dichotoma . Subcylindrical, often compressed or irregularly 

 nodulated ; dichotomous, flattened below each dichotomization ; rarely ap- 

 proaching a massive form. Internal tube generally obliterated, but wide 

 and distinct in one instance. Surface covered by numerous rounded pores 

 placed close together, and a few large rounded, scattered depressions, pro- 

 bably representing the "oscules" described by Picket. 



Common in the dark green marl of the second division of the Cretaceous, 

 of the New Jersey Geologists. I found it abundantly in the marl pits of 

 Hon. Nathan Stratton, near Mullica Hill, and in the same beds at Black- 

 woodstown, N. J. 



The branches are rarely found in pieces of more than an inch and a half in 

 length, are usually from a third to a half an inch thick, and are frequently 

 dichotomous, though I have only in one instance found a mass of more than 

 half a cubic inch in size. The surface is usually entirely destroyed, so that 

 the form alone distinguishes them from accidental concretions. The discovery 

 of undoubted pores in several specimens, however, indicate their organic 

 origin, though I caD only place it doubtfully in the above genu3. 



Catalogue of land and fresh water univalve MOLLTJSKS collected in British 

 America by Messrs. R03S, Kennicott and Drexler, and deposited in the Smith- 

 sonian Collection. 



BY W. G. BINNEY. 



From English River. 

 Helix arborea Say. 

 chersina Say. 

 striatella Anthony. 

 Bulirnus harpa Say. 

 Achatina lubrica Mull. 

 Limnaaa jugularis Say. 

 appressa Say. 

 am pi a Mighels. 

 palustris Lin. 

 Physa heterostropha Say. 



hypnorum Lin. 

 Planorbis trivolvis Say. 



From Ft. Simpson, on 3fackensie , s River, 



Succinea avara Say. 



lineata W. G. B. ? 

 Limnsea appressa Say. 



palustris Lin. 

 Planorbis trivolvis Say. 

 parvus Say. 



From Fort Resolution, Slave Lake. 



Succinea Haydeoi W. G. B., var. minor 

 Physa hypnorum Lin. 



From Hudson 's Bay. 

 Limnaea appressa Say. 

 palustris Lin. 

 caperata Say ? 



From James' Bay. 



Succinea ovalis Gld., non Say ? 

 Bulimus harpa Say. 



Physa ? 



Planorbis armigerus Say. 



From Moose Fort. 



Limnaea n. sp. ? 



From Moose Factory. 



Vitrina litnpida Gld. 

 Succinea ovalis Gld. non Say, 



obliqua Say. 

 Helix arborea Say. 



striatella Anthony. 

 labyrinthica Say. 

 monodon Rackett. 

 young albolabris or thyroides. 

 Achatina lubrica Mull. 

 Limnasa palustris Lin. 

 appressa Say. 

 Pbysa heterostropha Say. 

 Planorbis bicarinatus Say. 



parvus Say. 

 Amnicola lustrica Say. 

 porata Say. 

 limosa Say. 

 Yalvata tricarinata Say. 



[Oct. 



