RESEARCHES IN HELMINTHOLOGV AND PARASITOLOGY. IO5 



lific. A single female, 9 inches in length, by 2-5ths of a line in 

 breadth, which I had preserved in a large vessel of water, extruded 

 from between its caudal lobes a cord of ova, broken into segments, 

 the aggregate length of which was 91 inches, and breadth i-20th 

 of a line. I counted in each transverse disk of the cord about 70 

 eggs, and in the length of i-40tli of an inch 26 eggs, so that by 

 simple calculation : 70 X 26 X 40 X 91 = the whole number of eggs 

 deposited is 6,624,800. 



170. Gordiiis Aquaticus ? Gmelin. 



Gordius seta, Miiller. Diesing, Syst. Helm., ii, 83. 



Gordius lineattis, Leidy. Pr. A. N. S., v, 263 (1851). 



Gordius rohustus ? lycidy. Ibidem, 275. Body long, filiform, not 

 narrow^ed anteriorly, dusky yellowish white, cream colored, white, 

 light brown, or dark brown in color, sometimes darker at the ex- 

 tremities, lustrous. Areolae of the integument hexagonal. 



Female. — More robust than the male, opaque, and lighter colored. 

 Head obtusely rounded. Caudal extremity truncated, round. 



Male. — Narrower than the female. Head obtusely rounded. Cau- 

 dal extremity incurved, bifurcated ; caudal lobes curv^ed conoidal, 

 obtuse, fimbriated upon the ventral border with simple branching 

 dermal appendages. 



Six males from 5 to 7^3 inches in length and i-8th of a line in 

 breadth, and one female 5 inches in length by i-6th of a line in 

 breadth, of a dusky yellowish w^hite color, were obtained by Pro- 

 fessor Baird from a spring in Essex county, New York {Gordius 

 lineatiis, Pr. A. N. S., v, 263). One female of a light brown color, 

 with the head ringed with black, 3^2 inches long by i-5th of a line 

 broad, procured by Dr. W. S. Gibson from a spring in Philadelphia 

 county. A female of a cream color, with the head ringed with dark 

 brown, 4^2 inches long by i-5th of a line broad, I found in Frederick 

 Brook, at the head of the Bay of Fundy, New Brunswick. A fe- 

 male ((7. robnstus, Pr. A. N. S., v, 275), hardly narrowed at the 

 extremities, brown, rigid, with the head edged with dark brown and 

 the tail slightly expanded, conical, and obtuse, 6^ inches long and 

 ^2 a line wide, was obtained by Dr. Charles H. Budd from a boy, 

 who informed him it had crept out of the abdomen of a grasshopper 

 which accompanied the worm. A male and female were obtained 

 by Mr. Schafhirt from a single specimen of PterosticJnis fasfidites, 

 Dejean. The length of each is about 3 inches, the breadth of the 

 male i-8th of a line, of the female i-6th of a line. 



171. Merniis Albicans, Seibold. 



Mermis elongata, Leidy. Pr. A. N. S., v, 263. 



