262 E. &. Morse—Oviducts of Terebratulina. 
Measurements. 
Width of sternum between outer ends of coracoid grooves, 45°" 
Width of sternum. at: middle, .3.....0.2:..iaccsre wwe v4 39° 
Distance between coracoid grooves,.......+seeeeeeeere 5° 
Length (approximate) of femur,...........ee+seeeees % 126° 
Transverse diameter of shaft at middle,.............+.- 12°5 
Transverse diameter of distal end,...........+++---0 . 
The remains on which this species is established are likewise 
from the Post-pliocene deposits of Monmouth County, New 
Jersey. 
Yale College, New Haven, August 28th, 1872. 
Art. XXXIL.— On the Oviducts and Embryology of T erebratulina ; 
by Epwarp S. Morsg, Ph.D. With Plate IIL 
for the third time, and now my heretofore fruitless endeavors 
have been met with success. 
The results of these observations were communicated at the 
they assumed the form of a deeply annulated embryo, compos 
of four distinct rings, which hada marked vermian contraction 
be attaching 
themselves by the caudal segment. During the latter part © 
