Crosby.] 186 [February 5, 
Dr. Hagen also showed figures of the larve of Thyreus 
Abbotii, one showing a specimen so largely spotted with 
green, as to make this the predominant color, and remarked 
n the variations in the coloring of Sphingid larvae. 
General Meeting. February 5, 1879. 
The President, Mr. T. T. Bouvé, in the chair. Forty per- 
sons present. 
Dr. 8. Kneeland read an essay on the Monstrous in Art, 
or the relations of Zoology to Symbolism, illustrating his re- 
marks by specimens and photographs of various celebrated 
pictures and statues. 
The following paper was read: 
ON THE OCCURRENCE OF FOSSILIFEROUS BOULDERS IN THE 
DriFt OF TRURO, ON CAPE Cop, Mass. By W. O. Grossy. 
The extreme scarcity, amounting to almost complete absence, of 
distinctly fossiliferous rocks in this section of New England, causes a 
high degree of interest to attach to all new discoveries, even when 
these consist of erratics, as in the present case. The facts in this in- 
stance, however, possess a peculiar interest, since they point to the 
extension of the Tertiary deposits of our Atlantic sea-board to a 
point farther north than they have before been certainly known to 
occur. Briefly stated, the facts are these: boulders and pebbles con- 
taining Tertiary fossils have been found in the modified drift of 
Truro in this State. The credit of the discovery of these fragments 
belongs solely to Mr. Warren Upham, of Nashua, New Hampshire, 
a zealous and successful student of the surface geology of this and 
adjacent regions; and the following account of the finding and mode 
of occurrence of the material is extracted from notes which he has 
kindly placed at my disposal. 
The fossiliferous pebbles which occur in the drift of Truro were. 
first noticed by Mr. David F. Loring, keeper of the Highland Light, 
who had collected and given away a few pieces before my first visit 
to Cape Cod in November 1877. At that time he had no specimens 
left, and limited time prevented any search for them. In June last 
| 
| 
i 
| 
: 
