184 



SucciNEA CANELLA. Testa parva, sub-solida, opaca, ovata, 

 impolila, cinnamomea, leviter striata : spira conspicua ; anfr. 3, 

 ventricosis, sutura valde constricta discretis : apertura parva, 

 ovato-rotunda ; peristomate incrassato, postice sub-continuo ; 

 columella arcuata, baud plicata. Long. ^, lat. f poll. Hah. 

 Maui, Sandwich Islands. 



Very much like S. avara, Say, and S. caduca, Mighels ; but it 

 is less elongated, more solid, and without a columellar fold. 



Mr. Bouve exhibited a series of fossil Shells of the Genus 

 Strophontiena, from the blue limestone of Ohio, brought by 

 Mr. Bartlett, from Cincinnati. 



He stated that a Committee of the Western Academy of Nat- 

 ural Sciences had lately examined a large number of specimens 

 of this genus from the Blue Limestone, and had become satisfied 

 that far too many species had been formed from the individuals 

 found in that deposit. Instead of nearly twenty species, they 

 have come to the conclusion that they may all be reduced to 

 seven. 



Prof. Agassiz exhibited a Fish, which he showed to be 

 the Huro nigricans of Cuvier, though it differed in several 

 particulars, which he pointed out, from the figures and de- 

 scriptions usually given of that fish, which were drawn from 

 a defective specimen. It is the same species described by 

 De Kay under the names of Centrarchus fasciatus and C. 

 obscurus. 



Dr. Cabot exhibited a specimen of the Shovel-fish, from 

 Ohio river. 



It was about 12 inches in length. Prof. Agassiz remarked, 

 that, young as it was, the yolk-sac was absorbed. In this re- 

 spect, the sharks and other cartilaginous fishes differ from the 

 osseous, the former retaining the sac till a comparatively advanc- 

 ed period of their growth. The sturgeons resemble the osseous 

 fishes in this respect, which confirms the correctness of Prof. 

 Agassiz's classification of this tribe with the osseous fishes, 

 though their skeleton is as soft as that of the cartilaginous fishes. 



