RESEARCHES IN HELMINTHOLOGY AND PARASITOLOGY. 65 



from a few lines to one foot in length, in all a cord 91 inches long, 

 in which he estimated there were over 6,000,000 ova. Dr. L. ex- 

 hibited the cord of ova preserved in alcohol, which was long and 

 white and resembled a piece of cotton thread. 



[October, 1851. No. 87. See Bibliography.] 



Dr. Leidy remarked the members probably recollected that a few 

 evenings .since he had mentioned that it had been asserted by numer- 

 ous and good authorities that Gordii had been observed within the 

 body of insects. He now exhibited a specimen of a Gordius and a 

 grasshopper preserved in a bottle of alcohol, which had been sent 

 to him by his friend, Dr. Budd, of Pemberton, N. J. The Gordius 

 Dr. Budd stated was seen to come out of the body of a grasshopper, 

 and in half an hour afterwards died. It is a different species from 

 those described a short time since. It is a female, about six inches 

 long by half a line in length, rigid, strongly marked by transverse 

 wrinkles and annuli, with the caudal extremity somewhat com- 

 pressed and obtuse. To the species he gave the name Gordius 

 robustus. 



He also exhibited a species of Mermis from Brazil, belonging to 

 the collection of the Academy. It is fourteen and a half inches 

 long and of yellowish brown color. To it he gave the name Mer- 

 mis fcrruginca. 



[October, 1851. No. 91. See Bibliography.] 



Corrections and additions to former papers on helminthology pub- 

 hshed in the Proceedings of the Academy by Joseph Leidy, M. D. 



BoDO, Ehrenberg. 



I. Bodo Helicis, Diesing. Syst. Helm., I, 45. 

 Qryptobia Helicis, Leidy. Proc. A. N. S., Ill, loi ; An. and 

 Mag. of Nat. Hist., XIX, 209. 



Cryptoicus Helicis, Leidy. Journ. A. N. vS., new series i, 67, 



Vertex, Hemprich et Ehrenberg. 



I. Vertex Marginatus, Diesing. Syst. Helm., I, 229. 



Prostoma marginatum, Leidy. Proc. A. N. S., Ill, 251. Rarely 

 more than 3-5ths line long. Abundant in ditches below the city of 

 Philadelphia. 



Aorurus, Leidy. Proc. A. N. S., IV, 230. 



