422 



This collection consists of 36 vertebrae, and 26 fragments of 

 ribs and other bones. Zeuglodon remains are found in abun- 

 dance in the eocene deposits of Alabama ; they have also been 

 found in Georgia and Louisiana. 



On motion of Dr. Gould, a committee was appointed 

 to express to Mr. Hale the feelings of the Society for this 

 valuable donation, which included also at some future 

 time his entire cabinet of Natural History — Mr. Bouv^, 

 Dr. Gould, and Prof. Agassiz were appointed the com- 

 mittee. 



Dr. A. A. Gould presented the following descriptions 

 of Shells collected in the North Pacific Exploring Expe- 

 dition under Captains Ringgold and Rodgers : — 



SucciNEA LAUTA. Testa magna, tenuis, plerumque S. obli- 

 qu£e similis, sed postice tumidior, ad apicem minus acuta. Long. 

 Yjj ; lat. y^g- poll. On shrubbery at Hakodadi (I si. Jesso). 



A very large, thin shell, most like S. obliqua, Say. 



ViTRiNA iMPERATOR. T. niagnifica, fragilis, ventricosa, epi- 

 dermide rigida fuscescente induta, obsolete spiraliter striata ; anfr. 

 3+. Apertura ampla subcircularis, ad columellam vix incras- 

 sata. Axis f ; diam. 1^ poll. 



Inhabits Hong Kong in ravines near summits of hills. 



By far the largest species yet described ; approximates closely 

 to H. ampulla, Bens. 



Helix l.eta. Testa tenuis, lucida, subglobosa, viridi-cornea, 

 vitta rufa ad peripheriara et altera prope suturam ornata ; anfr. 5 

 ventricosis, striis volventibus tenuissimis. Apertura magna, sub- 

 circularis, peristomate modico, e verso, ad umbilicum magis reflexo. 



Axis 1 ; diam. 1^ poll. 



Inhabits Hakodadi on bushes and shrubs. 



General outline not unlike If. pomatia. 



Helix labilis. T. parva, tenuis, nitida, succinea, depressa, 

 lenticularis ; ad peripheriam acuta ; subtus convexa, polita, arete 

 umbilicata ; anfr. 5 convexiusculis. Apertura transversa, anguste 

 lunaris, columella verticalis. Axis y^j ; diam. ^ poll. 



