RESEARCHES IN HELMINTHOLOGY AND PARASITOLOGY. l8r 



eluded at the anterior fourth of the body, and opening ventrally by 

 a conspicuous central aperture. Generative orifice ventral at the 

 posterior fourth of the body. I^ength 15 to 20 mm. ; breadth 3 mm. 

 Eight specimens obtained from the mouth of the alligator, . /. niis- 

 sissippieusis, in Florida, by Mr. Stuart Wood. 



Accompanying the specimens is a fragment of the tongue marked 

 with circular scars, apparently due to the worms. The alcoholic 

 specimens in their present condition are incurved, with the lateral 

 margins inverted, and the included acetabulum produces a conspicu- 

 ous dorsal eminence. 



Of several Filariae exhibited, two, a female and a male, pertain to 

 the species Filaria horrida, Diesing. The former is 28 inches long, 

 the latter 11 inches. They were obtained hy Dr. Henry C. Chap- 

 man from the thorax of the American ostrich, Rhea amcricana . 

 The other specimens were obtained b^- Mr. P. L. Jouy from the 

 abdomen of Strix brachyotiis. They consist of four females from 1 2 

 to 14 inches long and a half a line thick, and two males 2 V2 inches 

 long and one-fourth of a line thick. They are thicker anteriorly 

 with the head end obtusely rounded, and with the mouth minute and 

 bounded by a minute pair of conical lips. The tail end of the fe- 

 male is straight and blunt ; that of the male is more tapering, and is 

 included in an elliptical alary appendage, supported on each side 

 by a row of five curving ribs. A pair of similar, but shorter and 

 straight papillae, is situated near the anal aperture, and a pair of 

 pointed processes diverge from the end of the tail into the alary 

 expanse. 



Two species of Filaria have been previously observed in Strix 

 brachyotus, F. atteiiuata Rud., and F. foveata Schn., to neither of 

 which the specimens under examination appear to belong. These, 

 however, so closely accord with the descriptions of F. labiata Crep- 

 lin, from the black stork, Ciconia nigra, that, notwithstanding the 

 remote relationship in the host, the speaker believed them to belong 

 to that species. In the construction of the caudal extremity of the 

 male they closely approximate the condition of F. labiata and F. 

 /lorrida, as represented in the figures of Schneider (Monographic der 

 Nematoden), while they are widely different from that of F. attenuata 

 and F. foveata, as represented in similar figures pf the same work. 



[May, 1884. No. 526 See Bibliography.] 



A Rare Human Tapeivorm. — Dr. Leidy directed attention to some 

 little tapeworms which had recently been submitted to his exam- 



