260 
form; spores 8 in. the thekes, brown, oblong to linear, 4-locular, 
constricted, 5-2 mic. Parasitic on Buellia excentricum. 
PYRENULA Ach. 
P. punctiformis Ach. 
P. glabrata Ach. 
P. lactea Mass: 
P. thelaena (Ach.) Tuck. 
P. nitidella Mull. 
A Diatomaceous Deposit from an Artesian Well at Wildwood, N. J. 
By CHARLES S. BOYER. 
An artesian well sunk recently at Wildwood, N. J., exhibits at 
certain depths diatomaceous deposits of unusual interest. Mr. 
Woolman, whose researches into the geology of artesian borings 
are well known, has sent me samples of earths with the request that 
I enumerate the diatoms found therein. The accompanying list 
includes specimens occurring in a bed from 78 to 180 feet deep, of 
which Mr. Woolman remarks in the annual report of the Geolog- 
ical Survey of New Jersey for 1893 (page 401) that “a correspond- 
ing clay bed does not exist beneath the beaches to the northward, 
if we may judge by the specimens of borings furnished from the 
various wells or by the records where no specimens were ob- 
tained. It was probably in some way associated with the deposits 
of the Delaware River delta in a somewhat recently past geologi- 
cal age, and before the present peninsula of Cape May was formed.” 
It is not the purpose of the present paper to give a list of the 
forms obtained from the entire series of the well boring which has 
reached the depth of 1245 feet, passing through beds apparently 
identical with the Miocene deposits noticed at Atlantic City and 
which have already been described, but as the fresh water forms 
are very numerous and as there are associated with them certain 
marine and brackish water species not heretofore noticed in North 
America, the enumeration of all the diatoms thus far seen at the 
depths of from 78 to 180 feet, is here given. 
