Botany and Zoobgij. 239 



and seems to live on the tree like a plant on its soil. — Comptes 

 AV/rA/N. Jan.. 1877; Xnture,, Jan. 25, 288. 



4. Observations on Rhizopods.—Ptot Leidy stated that last 

 July, in the sphagnum -wamps of Tobyhanna, Pocono Mt., Mon- 

 roe Co., Pa., he noticed an abundance of a Uhizopod which he 

 thought he had not previously seen, and which he at first sup- 

 posed to be an undescribed species, but which he now viewed as a 

 variety of //;/'t/n.y,/i> ni<i ihjafu. From this :is previously de- 

 scrihed, it differs in the test being of a pale sienna color, and per- 

 haps of greater thickness, but otherwise is like it. The test is 

 compressed pyritonn, with the length and breadth nearly or about 

 e'.pui, and the thickness one-half The lateral orders are ob- 

 tusely rounded. The mouth is transversely oval. The sarcode is 

 colorless, and attached to the inside of the test by diverging 

 threads. The pseudopods are usuallv from two to three. Meas- 

 urements, -08 mm. long and broad, and -036 thick, with the mouth 

 "02 broad and -()()8. Others varied from -06 long and '08 broad, 

 to -092 long by -064 broad. 



In observing the Pocono variety of Hyalosphenia ligata, and 

 the beautiful and well-marked species Hyalo^hen'ci p,i/>>/>'u.ho 

 detected i 



important point 



i one or more pseudopods extended 

 ) the margin of which the sarcode is 



attached, as well as by diverging threads to \ 

 interior of the test. The interval between the body of the sar- 

 code and the interior of the test is occupied with water. The 



extent of the interval increase- with the increase in number and 



with food of the sarcode 

 lidrawn into the mouth of 



body. When the pseudopods are withdra 



the test, the mass of the sarcod* , cpan Is in a corresponding rano, 

 and the threads of attachment to the in>ide of the test contract 

 m length. The intervening >placed through 



small apertures of the lateral borders and tundus ot the test, 

 which exist in numbers usually from two to halt a dozen or more 



While speaking of Rhizopods, he would ask the attention of 

 the Academy to some remarks on recent observations on the 

 habits of several species of Ammba. . 



One of the species of V.meba which he had most commonly 

 ^n, he took to be the A,,,<vha n rnn-osa of Ehrenberg with 

 which the A. nutans of Perty, and the J t,,: >e»la ot ^reef, ap- 

 many places: in the civvices oi the brick pavement in the yard 

 attached to his residence, in brick ponds, in the ooze ot the rocky 

 shores of the S.-hu - -"amps, m marsh 





