106 



Dr. Crisp placed before the Society drawings of the viscera, of tlie 

 size of life, of a large Pike {Esox lucius). The subjoined are the 

 dimensions of the fish and the weight of the body and of the 

 viscera : — 



\Veight of body, 28 Ibs. ; leugth, 3 feet 7 inches ; largest circura- 

 ference, 23 inches. Weight of heart, 160 grains ; of Uver, lOoz. j 

 of kidney, 1 oz. ; of spleen, 171 grains; of brain, 75 grains. The 

 diameter of the eye was 13 lines, and the largest tooth (maxillary) 

 was 7 lines in length. 



Alime7itary canal. — CEsophagus, 6 inches ; stomach, 9 inches ; 

 intestines, 3 feet 3 inches. Totai, 4 feet 6 inches. 



The kidney, which was very thin, measured 1 9 inches iu length ; 

 the air-bladder, 18 inches. 



The gall-bladder, seated at the upper part of the unlobed liver, of 

 a pyramidal shape ; it contained about 3 drachms of bile. 



Portions of a carp were found in the stomach, vfhich, judging from 

 the scales and some of the cranial bones, mušt have been of large 

 size ; probably 2 or 3 Ibs. The most interesting fact, however, that 

 presented itself was the large size of the oviducts. These weighed 

 ■ 7 Ibs., and measured 22 inches in length. As near as could be 

 computed, the number of ova amouuted to about 700,000. The 

 fish was taken m HoUand about the 8th of the present raonth, April, 

 and the ova appeared to be matured. 



The diameter of the blood-corpuscle of this fish was the šame as 

 that of the blood-corpuscle of smaller specimens. 



Dr. Crisp had not been able to find any account of the dissection 

 of a large Pike, and for this reason he had placed an outUne of the 

 visceral anatomy before the Society. 



Dr. Crisp exhibited the drawing of a hairless Mouse, with the skin 

 corrugated in the šame manner as in those exhibited by Mr. Gaskoin 

 at a recent meeting of the Society. The specimen, No. 120, is in 

 the Museum of the CoUege of Surgeons ; it was found alive in the 

 kitchen of the late Mr. Clift, and is thus described in the CoUege 

 Catalogue under the head Monstrosities : — " A common Mouse, 

 which from its birth had not the shghtest appearance of hair upon 

 its skin, being perfectly naked." 



