562 AMERICAN ASSOCIATION 
ipt Eu and Polyplacophora, included by Troschel in this order, 
o be eliminated; the former having the value of a subclass, while 
ae test form a well marked order. He concluded with some remarks 
on the synonymy of some of the genera most abundantly represented on 
our coasts. 
Mr. Tuomas MEEHAN read a paper on “ Nutrition and Sex in Plants." 
He referred to his **laws of sex," read last year, and now proposed to 
show that a decreased power of nutrition was one of the operating causes 
rme 
before the supra-pistillate ones opened. These were extremely weak, 
owing to the superior absorptive power of the females below them. He 
then exhibited some specimens of these, as well as some from a es 
large Chestnut tree, which had always borne abundant fruit, but had this 
year produced nothing but male flowers. The leaves were all striped 
with yellow and green, j inóloatini; as every PEO RAEE gardener knows, 
that. nutrition was obstructed. ants over watered, by which the young 
feeding roots rotted, always put on this yellow cast. The yellow tint 
always followed “ringing” the branches, or any accident done to the 
of the agents € Frei on the as of vitality that governed the sexes. 
rof. E E of Philadelphia, read a paper on the ** Reptilia of the 
'Triassic e cacao of the United States.” He stated briefly the distri- 
bution of the rocks of Triassic sui and the localities at which verte- 
brate remains have been found. He stated that fourteen supposed species 
es = pigs which had not "Pm sb red to ien epotopriMes ons 
e then pointed out that three of the ge — Megadactylus of 
Hiteheoek, Clepsysaurus of Lea, and Bathygnathus E Leidy, longe to 
the order Dinosauria. This he had been unable to determine from the 
d r eyen the Ai bones, but from the pis elements. 
ec 
when in a sitting position. The fore limbs of the Megadactylus were 
rather long. The genus Clepsysaurus was, as Lea has pointed out, nearly 
related to Paleosaurus of the Bristol (England) conglomerate, while Ba- 
thygnathus was also related to the same and to Teratosaurus. Of the 
wW 
was established on remains from ee PER poni ered by 
