1849.] 249 



Also a letter from M. Victor Motchaulsky, proposing to exchange 

 Russian Coleoptera for those of America. 



Also a communication from the President of the Academy, William 

 Hembel, Esq , reiterating his desire to decline a re-election to the 

 office, and expressing his acknowledgments for the sentiments contained 

 in the resolutions passed at the last meeting of the Society. 



Dr. Morton read a continuation of his paper on the size of the Brain 

 in the various races of Man, the first portion of which was presented 

 at a former meeting. Referred to the same committee, viz., Messrs. 

 Phillips, Hallowell and H. C. Lea. 



On leave granted, the Committee to which was referred Dr. Le 

 Conte's memoir, '< An attempt to classify the Longicorn Coleoptera of 

 that part of America north of Mexico," presented a report, recom- 

 mending the same for publication in the Journal. 



December 2bth. 



Prof. W. R. Johnson, in the Chair. 



The committee to which was referred the following paper, by Dr. 

 Leidy, reported in favor of publication in the Proceedings. 



Descriptions {aecom]panied by drarvijigs,) of neio Genera and Species of 



Entophyta, 



By Joseph Leidy. M. D. 



Enterohrris spiralis. Yellowish, biownish, brown, or hyaline, forming a sin- 

 gle, double, or triple spiral. Peduncle brownish or yellowish, columnar 

 l-2500th in. long, by l-6000th in. thick. First or principal cell uniformly cylin- 

 drical, filled with granules and globules, l-428-'Jth in. in diameter. Penultimate 

 cell cylindrical, filled with granules and a few globules, l-428th in. long. End 

 cell clavate, filled with granules, l-535th in. long, by l-3333d in. at broadest 

 part. 



Length from l-70th to l-50th in., by l-4200th in. broad. 



Habitat. — Grows from the mucous membrane of the small intestine of Jului 

 pusillus. 



Remarks. — This species is found in varying quantity from a half dozen indivi- 

 duals up to fifty or more of various ages. The specimens of Jukis pusillus from 

 which the plant was obtained, measured half an inch in length. 



Etiterobrus attenuat%is. Faintly brownish, yellowish, or hyaline, forming a 

 double flexure or sigmoid curve, and then growing in a very straight course to its 

 termination. Peduncle yellowish, columnar, sometimes double, l-66Gth in. long, 

 by l-2300th in. broad. Principal cell attenuated at both extremities, rounded or 

 truncated at the distal end, and filled with varying quantity of globules and 

 granules. End cells? 



Length J -24th in. ; diameter at middle l-1500th in,; at sigmoid curve l-2300th 

 in. ; at distal extremity l-2500lh in. 



Habitat. — Grows in profusion from the mucous membrane of the ventriculus of 

 Passalus cornutus. 



