2T,S rksearche;s in helminthology and parasitology. 



tium 0.3 mm. broad : upper hooks 0.14 mm. long, lower ones o. r 

 mm. long. 



From the peritoneal cavity of the Jack Rabbit, Lepus paliistris, 

 from northern Minnesota. Submitted by Mr. Horatio C. Wood. 



30. Tcenia 7ieniaiosoma, n. s. — Head rounded quadrate, unarmed, 

 with equidistant hemispherical bothria and a small central papilla ; 

 neck short or none ; fore part of body linear ; anterior segments 

 much wider than long ; posterior .segments gradually becoming pro- 

 portionately longer, quadrate or barrel-shaped : genital apertures 

 marginal and alternating irregularly. Length to 9 inches, contract- 

 ing to about one-half. Breadth of head 0.375 to 0.5 mm.; bothria 

 0.175 wide; neck 0.25 wide; anterior segment an inch from the 

 head 0.175 mm. long by 2 mm. broad ; posterior segments 0.75 mm. 

 long by 2 mm. broad, and when contracted widening to 2.5 mm. 

 Ova spherical, 0.028 to 0.032 mm. 



A half dozen specimens in the stomach of two Pickerel, /tsox 

 retiadatus. 



31. Tetrabothrium triangularc, Diesing ? — Head large, oblate, 

 spheroidal, and formed bj- four large bothria ; neck short or none ; 

 anterior segments of the bod}^ transverse linear, then oblong square, 

 the posterior segments short campanulate ; genital apertures mar- 

 ginal. 



Several inches in length ; described from fragments of several 

 individuals. Head 0.55 mm. long by 0.75 mm. broad ; bothria 0.5 ; 

 neck 0.3 wide; body 15 mm. behind the head indistinctly seg- 

 mented and 0.125 mm. wide. In a fragment without the head, 

 about an inch long, the anterior segments are oblong square with 

 prominent marginal genital apertures and 0.3 mm. long by 0.25 mm. 

 wide; the posterior segments 0.175 mm. long and 0.2 mm. wide. 

 In a posterior segment of half an inch the segments readily sepa- 

 rable are short campanulate, 0.175 mm. long and 0.375 mm. wide. 

 From the intestine of Mcsoplodon sowcrbicnsis. Submitted by Dr. 

 Cooper Curtice, Washington. 



32. Tetrabothrium /oligi?iis. 



Tcenia loliginis, Leidy. Proc. A. N. S., 1887, 24. 

 The Scolex of Tetrabothriiu7i Rudolphi, or Phyllobothrhim Van 

 Beneden. A dozen specimens in alcohol, obtained from the Squid, 

 Ommastrephes illecebrosa, at Bar Harbor, Me. In their present con- 

 dition they are an inch in length or less and from 2 to 3 mm. wide, 

 linear lanceolate, posteriorly acute and unsegmented. The head is 

 prominent, spheroidal, and consists of four much-folded rosette-like 

 lobes with hemispherical bothria. Submitted by Dr. H. C. Chapman. 



