118 PROCEEDINGS OF THE ACADEMY OF 



Prof. Letdy directed attention to some remains of PaldeoHyops, 

 recently received from Dr. Joseph K. Corso'n, U. S. A., who dis- 

 covered them at Grizzly Buttes, near Fort Bridger, Wyoming 

 Territory. They were more complete than those from which this 

 cnrious tapiroid animal was first characterized, and mainly consist 

 of portions of several lower jaws. 



The specimens exhibit teetli, and fragments and traces of others 

 indicating, at least, a series of six molars, which approached so 

 closely the position of a large canine tooth, as to indicate that 

 little or no hiatus existed between the former and the latter. The 

 back portion of the lawer jaw is broad and deep as in the Tapirs, 

 and a deep concavity occupies a position externallj'' in advance 

 and below that of the condyle. The body of the jaw is thick and 

 strong, with a thick convex base. The bottom of the symphj^sis 

 appears hardly to have reached the position of the anterior pre- 

 molar. 



The lower true molars are like those of the Palseotherium, An- 

 chifhermm, &c. The outer portion of the corresponding upper 

 molars likewise resembles that in the genera just named, but the 

 inner portion is different. The antero-internal lobe is a low cone 

 with a base expanding so as to occupy two-thirds the inner por- 

 tion of the crown. The postero-internal lobe is trilateral. The 

 last upper premolar has the crown composed of an outer pair of 

 conical lobes, and a single larger inner cone. The last lower pre- 

 molar is like the succeeding true molars. The lower penultimate 

 l^remolar has the anterior lobe of its crown proportionately more, 

 and the posterior lobe less, developed than in the succeeding teeth. 

 The series of the lower true molars measures 3J inches ; the depth 

 of the jaw below the interval of the second and last true molars 

 is 2| inches. The last lower molar measures 19 lines fore and 

 aft. The second upper true molar is 16^ lines transversely and 

 fore and aft. The last upper molar is about 19 lines fore and aft 

 at its outer part. 



Mr. Thomas Meehan said he had recently observed that a 

 clasping motion when touched existed in the stigma of Torenia 

 asiatica, similar to that well known in the leaf of Dionsea musci- 

 pula. In this the stigma was cloven into two flat valves, which 

 were usually expanded and somewhat revolute; when it was 

 touched on its inner surface, the valves slowly closed together. 

 The motion could scarcely be perceived, on account of the small- 

 ness of the parts ; but it occupied in a total closing only about 

 thirty seconds. 



He also exhibited a branch of Gissus amazonica in which the ten- 

 dril, usually situated on the stem opposite to a leaf, was in one in- 

 stance on the other side, under the leaf, as if the leaf were axillary 

 to the tendril. He remarked that the best botanists did not seem 

 united in their opinions as to the correct morphology of the tendril 

 in vitaceous plants. He had supposed the basis of structure in this 



[July 11, 



