240 RESEAKCHKS IN HELMINTHOLOG Y AND PARASITOLOCVY. 



(Cobbold, Parasites, 1879, 21.) In our Proceedings for 1873, p. 

 304, I gave notice of a specimen from a Chinese boy, which I then 

 supposed to be a larger individual than usual of the more common 

 D. hepalicuni . 



On several occasions I have had the opportunity of examining 

 some large Plukes from the liver of our Deer, Cervus vircrinianus, 

 and the Domestic Ox, which appear to be identical with the P. 

 crassicm. The specimens preserved in alcohol and submitted to me 

 are as follows : 



Six individuals, obtained from the liver of a Doe, in the Adiron- 

 dack Mountains of New York, by Dr. R. A. F. Penrose. These 

 range from 5 to 6 cm. long by 1.5 to 2.5 cm. broad and 1.5 to 2.5 

 mm. thick. 



Three individuals from the liver of a Calf at Hot Springs, Ark., 

 obtained by Dr. G. W. Lawrence. The specimens much contracted 

 and hardened by strong alcohol measure 3.5 cm. long by 2 to 2.4 

 cm. broad. An imperfect one is from 3 to 4 mm. thick at the 

 broken border ; white for half the thickness dorsally and black 

 ventrally. 



Two individuals recently received from Texas from Dr. M. Fran- 

 cis, veterinary surgeon, who writes that the monster Flukes occur 

 there in cattle in limited number in the liver-tissue and not in the 

 bile-ducts like the Distoma liepaticum. The specimens measure 3.5 

 and 4 cm. long by 2 and 2.5 cm. broad. 



The Flukes from all three hosts accord in character except size, 

 and in many points appear closely related with the D. hcpatiaini. 

 They are elliptical in outline and of greater proportionate breadth 

 than in the latter. The oral pole is conical, but not abruptly pro- 

 longed as in that species. The caudal pole is broadly rounded and 

 entire or medially .slightly emarginate. The dorsal surface is con- 

 vex, smooth, and cream-colored ; the ventral surface flat or slightly 

 concave, minutely granulate or brownish margined with black, due 

 to the vitelline organs shining through. The oral and ventral ace- 

 tabula are from 4 to 5 mm. apart ; the former oral about 1.5 mm. 

 wide ; the latter slightl}' larger. Genital aperture midway between 

 the acetabula. Penis in some individuals ex.serted as a short tor- 

 tuous papilla. The sides of the body extending from near the head 

 to the tail, occupied by intensely black dendritic vitelline organs. 

 The body is less tenacious than in P. hepaficum, is soft and easily 

 broken . 



Accompanying the monster Flukes from Texas were eighteen 

 specimens of the ordinary Liver-F'luke, Pistoma hepaticum, up to 



