90 RESEARCHES IN HELMINTHOI.OGY AND PARASITOLOGY. 



Four specimens were found in a large cream- colored liver, which 

 had been left upon a stall in our fish market. I could not ascertain 

 the species of fish from which it was obtained, but I suspect it to 

 be the halibut, Hippoglossns vulgaris. ICach worm was closely coiled 

 up at the bottom of a long clavate sac, which was composed of three 

 distinct membranes. The first membrane adhered to the structure 

 of the liver "in which it was embedded, beneath the peritoneum. 

 The second membrane was transparent, crisp, and shining. The 

 third one was milk-white, soft, and contractile, and it presented a 

 delicate, tortuous white opaque line extending the length on each 

 side. After opening the third membrane, beneath water, the worm 

 gradually crept out of its own accord. 



63. Pentastoimim Stibcylindriaim , Diesing ; Pentastomum Didel- 

 phidis virgiiiiayuc , Leidy. Pr. A. N. S., v, 96. In cysts of the 

 liver of the opossum, DidelpJns virginiana. 



64. Pc'utastomuDi linryzomnu, Diesing. In the liver of Cynoceph- 

 aliis porcarius. 



65. Pentastoninni Proboscidciim , Rud. In the lungs of the Boa- 

 constrictor. 



66. Pentastomum Gracilc, Diesing. Body sub-clavate, incurved, 

 most narrowed anteriorly, annular, not plicated, with the margins 

 of the animli microscopically denticulated. Head obtuse, bothria 

 subterminal, elevated, each with two hooks, of which the upper 

 one is the smaller. Mouth elevated, conical, in the focus of the 

 semicircle formed by the bothria. Length from 3 to 4 lines, breadth 

 YiA of a line. 



Eleven specimens were obtained by Jos. Jones from the stomach 

 of the Alligator luississippiensis. 



Rhvngodea. 



67. Gregarina Juli Marginati. 



Grcgarina larvata, Leidy. Pr. A. N. S., iv, 232. 

 Gregarina juli marginati, Leidy. Trans. Am. Phil. Soc, 2d 

 ser. , X, 237. 



68. Grcgarina Juli Pusili, Leidy. Trans. Am. Phil. Soc, 2d ser., 

 X, 238. 



69. Gregarina Poly desmi I'irgijiiensis. Ibidem. 



70. Gregarina Passali Cornuti. Ibidem. 



71. Gregarina Achetce Abbreviata:. Ibidem. 



72. Gregarina LocustcB Carolines. Ibidem, 239. 



73. Gregarina Blattarum, Siebold ; Gregaiina blatter orientalis, 

 Leidy. Trans. Am. Phil. Soc, 2d ser., x, 239. 



