152 [February, 



observed upon its surface. The small intestine is five feet six and a half inches 

 (Fr.) in extent; it has no valviila; conniventes, neither does it present any glands 

 of Peycr, nor are any solitary glands observed; the intestine, slit up its entire 

 length, is perfectly pale, both upon its external and iinier surface, and no soften- 

 ing of tlie mucous membrane is noticed; it contains a quantity of greenish fluid; 

 no yellowish matter is observed at ils upper extremity; it contains no tnbcrcles, 

 and there are no ulcerations. The large intestine is two feet two and a half 

 inches in extent; there is a distinct ccecum, but no appendicula vermiformis; it 

 contains a quantity of greenish-looking fluid, similar to that in the small intestine ; 

 the mucous membrane throughout is quite pale, and appears to be healthy; held 

 up to the light the mucous follicles are very distinct, but are not very abundant, 

 and are more irregular in their outl.ne than those of the human subj<^ct ; they are 

 surrounded by a dark-coloured border, and several dark points are observed 

 within tlie circumference of the greater number, (in some of them there are as 

 many as six.) Mesenteric glands, move or less tuberculous, and yet the animal 

 does not appear greatly emaciated ; the disease appears to be more fully developed 

 in these glands than in any of the other organs ; one of them is much enlarged, 

 measuring Iburteen lines by thirteen in size; adherent to it is another, thirteen 

 lines by ten; these glands are filled with a white homogenous matter, of the 

 consistence of thick cream; no marks of inllammation are found to exist in any 

 part of the body, except in the lowest lobe of the right lung, where the tubercle* 

 are thickly agglomerated, the tissue of the organ being firm and resisting to the 

 touch. Both kidneys are tuberculous. They are sixteen lines in length by ten 

 in breadth; upon the convex margin of the left, near its anterior extremity, is a 

 deposit three lines in diameter, resisting to the touch, ami elevated considerably 

 above its surface; it is composed of numerous small white bodies; other tuber- 

 culous deposits, of various sizes, from that of a grain of sand to a line or more 

 in diameter, are observed upon the surface, for which portion of the kidney they 

 appear to have a predilection. Bladder healthy. 



The Committee on Mr. Conrad's Description of new Shells reported 

 in favor of publication. 



Descriptio)is of new frcsli water and marine Shells. 



By T. A. CoNEAD. 



The following new fresh water shells from Georgia w"re kindly loaned mc for 

 description by J. Hamilton Couper, Esq. , 



LNIO. 



U. secariformis. Suborbicular, thick, compressed; valves slightly convex; 

 umbo llattehed, marked with obtuse, narrow, divaricated plaits; plaits on the 

 lower half of the valves obscure and interrupted; umbonial slope rounded; pos- 

 terior slope with strong oblique plaits towards the apex ; beaks eroded ; epidermis 

 black; within white; cardinal teeth large, direct, profoundly sulcated. li: \\. 



Inhabits Flint River, Georiria. 



U. stagiialis. Widely elliptical, ventricose, rather thin; towards the posterior 



