496 
mens in herbaria may account for the way in which the plant was 
excluded from botanical literature by later authors; an examina- 
tion of the original specimens of the plant in question, however, 
shows that it is not a Melothria in the modern sense and hereafter 
may be known as 
¥ CAYAPONIA GRANDIFOLIA (T. & G.). 
_ Melothna grandifolia T.& G. FlLN. A. 1: 541. 1840. 
The species is closely related to Cayaponia Boykinii of the 
Southern States, but differs in the more robust habit, the larger 
leaves and in the larger and more elongated fruit. 
The Santa Monica Diatomaceous Deposit with List of References 
to Figures of Species. 
By E. A. ScHULTZE AND C. HENRY KaIN. 
Probably no fossil diatomaceous material ever excited greater 
interest than that from Santa Monica, California. A paper upon 
the deposit by Mr. Charles Stodder was read before the San Fran- 
cisco Microscopical Society, December 5,1878. At that meeting, 
Mr. Thomas P. Woodward, who found the original piece of ma- 
terial, stated that he discovered it in the tidal refuse left by the 
waves at high water mark. The locality was about two miles 
south of a lagoon situated several miles southeast of Santa Monica. 
He also stated that there were no evidences of any other diato- 
maceous earth in the vicinity. 
A few years since, Mr. F. H. Dunning, of Battle Creek, Michi- 
gan, discovered that the true source of the material was at Re- 
donda Beach, some twenty-five or thirty miles south of Santa 
Monica. At this place the material occurs abundantly in a bluff 
situated on the beach, and pieces of it which have been broken 
off by the action of the waves can be picked up at low tide, at the 
foot of the cliff. 
‘Mr. Silas L. Schumo, of Philadelphia, who has recently visited 
the locality, states that the diatom cliffs begin about ten miles 
south of Redondo Beach and extend southward for several miles, — 
at least as far as San Pedro. There is some difficulty in getting at 
the material, however, as the foot of the cliff is only accessible at 
low tide. The deposit is so interesting that it is to be hoped | 
microscopists on the Pacific coast will explore it more thoroughly. 
