444 [December, 



12. Taenia Strigjs acadice, Leidy. 



Two specimens each about l inches long, and apparently consisting of the 

 whole body, except the head and neck, were obtained by Prof. Baird, from the 

 small intestine of Nyctale aeadica. The body is compressed cylindroid, with 

 the anterior segments narrow, conical and those posteriorly moniliform. Breadth 

 anteriorly \ ef a line ; posteriorly ^ of a line. 



13. Taenia variabilis, Rudolphi ? 



A fragment 3 inches long and 1 line wide was procured by Prof. Baird, from 

 the intestine of Scolopax minor. Segments short, broad, and subcampanulate ? 

 the inferc-lateral borders being everted. 



14. Taenia dispar, Goeze. 



Several specimens obtained by Prof. Aga.?siz, from the intestine of Menobran- 

 chus maculatus, without the head, are 3 inches long and a line wide, and have 

 longitudinally oblong segments, with lateral and alternate marginal generative 

 apertures, and filiform penes. I further have obtained four specimens from Rana 

 pipiens ; and two about 6 inches in length, from Bufo americanus. 



15. Taenia lactea, Leidy. Head small, continuous with the neck, without 

 rostellum ; acetabula anterior, hemispherical, situated at the four angles. Neck 

 moderately long. Segments anteriorly transversely oblong, posteriorly longer 

 than the breadth, square with rounded angles. Generative apertures marginal 

 (indistinct in the specimen). 



Hab. One specimen 16 inches long and of a line wide, was found in the in- 

 testine of Tropidonotus sipedoji. In alcohol the specimen contracted to half 

 the original length and widened to 1 line. 



16. Taenia gibbosa, Leidy. Head minute, discoid : acetabula horizontal, 

 contiguous, circular ; mouth not prominent, unarmed. Neck long, broad, and 

 thick. Segmented portion of the body comparatively short ; segments trans- 

 versely oblong ; the last one discoidal. Generative apertures not seen. 



Hab. Two specimens, 1 inches long, with the greatest breadth 1$ lines, 

 were obtained by Dr. Le Conte, from the intestine of a species of Lamna in- 

 habiting the Pacific coast of North America. 



17. Dibothrium punctatitm, Rudolphi. Head 1 to 1$ lines long; oblong; 

 bothria marginal, linear. Neck none. Anterior segments cuneate or triangular ; 

 posterior ones quadrate; each with an appearance of three sub-divisions, with 

 the sub-segments having a pair of generative apertures, in the course of a longi- 

 tudinally depressed, dark colored line, passing the length of the body. Length 

 1 foot; greatest breadth li lines. 



Hab. Intestine of Platessa plana. 



18. Ligula monogramma, Creplin. 



A specimen, imperfectly developed, 6 inches long with the greatest breadth 

 6 lines, waa obtained from the abdominal cavity of the Morrhua americana, by 

 Mr. Schafhirt ; and two specimens of almost the same length, with the greatest 

 breadth 5 lines, were obtained from the abdominal cavity of Leuciscus pulchel- 

 lus, by Prof. Baird. 



An enumeration of Mosses detected in the Northern United States, which art 

 not comprised in the manual of Asa Gray, M. D. } some of which are new 



species . 



By Thomas P. James, of Philadelphia. 



Andrea Rothii Mohr, Fl. Crypt. Germ. t. 11. f. 7-8. 



Hab. On rocks and the ground, White Mountains, New Hampshire. 



Astomum subulatum Hampe, Phascam sub?ilahim, Linn. Sp. PI. p. 1570. 

 Brid. 1. p. 37. Bryol : Europ. fasc 1. p. 15, tab. 7. 

 Hab. Old fields, Pennsylvania. 



