268 



Acipenteridce. 



f. Siberian fragments. 



Note. This specimen consists of small scraps made up into plano- 

 convex pieces about 1 iuch in diameter and i inch thick. 



* y. Persian lump isinglass. (Konki.) 



Note. This isinglass appears to have been strung on sticks, being 

 pierced at either end with a hole nearly J inch in diameter. The pieces 

 are kidney-shaped, about 4 inches long by 2 broad and 1 inch thick. 



h. Boiled isinglass. 



Note. This specimen consists of flattened sausage-shaped pieces 3 or 4 

 inches long, 1 inch broad, and about inch thick. 



t. Isinglass cuttings. 



j. Hudson's Bay purse isinglass. 



Note. The specimens marked with an asterisk were presented by 

 Professor Ludewig, of St. Petersburg. Specimen j has the appearance of 

 belonging to some species of Acipeuser. It is described in Per. Mat. 

 Med., vol. ii., pt. ii., p. 774. 



817. GENERA ET SPECIES INCERTA. 



a. Bead, or necklace isinglass. 



Note. In small somewhat translucent pieces about 1 inch long and ^ 

 inch in diameter, strung upon cord. See Per. Mat. Med., vol. ii., pt. ii., 

 p. 772. 



b. Hudson's Bay giant purse isinglass. 



Note. For further information on the varieties of isinglass found in 

 English commerce, see Per. Mat. Med., vol. ii., pt. ii., pp. 769-778 ; P. J. 

 [3], vol. i.,p. 656. 



ORDER, ELASMOBRANCHII. 

 PRISTIDJE. 



818. PRISTIS ANTIQUORUM, Lath. 



a. Beak of the saw-fish. 



Note. For an account of this fish, see Trans. Linn. Soc., 1794, vol. ii., 

 p. 277, pi. 26, fig. 91. This specimen is about 4 feet long, and the teeth, 

 32 in number on each side, at the upper end are inch, becoming about 

 the middle 1 inch, and near the head of the fish 2 inches apart. The 

 cutting edge of each tooth is on the side furthest from the head. 



CLASS, REPTILIA. 



ORDER, OPHIDIA. 



BOIDM. 



819. BOA CONSTRICTOR, L. 



a. Excrement. (Excrementum monitorit nilotici.) 

 Note. This substance is used as a source of uric acid. 

 VIPERIDJB. 



820. PELIDS BERUS, Herrem. (Viper, Adder.) 



a. Viper's fat. 



