AMERICAN ASSOCIATION ADVANCEMENT OF SCIENCE. 633 
terminates abruptly with the 17th vertebra, and no caudal chain of inter- 
spinous bones can be traced. The liver is small, when compared with that 
of the young Orthagoriseus, and is composed principally of a large right 
lobe overlying the stomach. The stomach is small and the intestine is 
short, making but two sii like the letter S, while in Orthagoriscus it 
is long and has five or six turns, or coils. The arrangement of the mus- 
cles and the bones of the head are, in general, about the same as in 
Orthagoriscus. 
Figure 134 is from a specimen of Molacanthus Palassii,* natural size. 
This specimen was taken from the stomach of a dolphin caught in the 
Figure 135 is the po of MM (Cephalus) hee i 
from Harting’s Memoir. This specimen was taken from t 
‘ Thon ” caught in the Auaris pode and is represented of cin size. 
Figure 136 is from one of the young specimens of Orthagoriscus mola 
taken in Massachusetts Bay. Natural size 
Figure 137 represents the adult form of Orthagoriscus mola from a draw- 
in their outline. The best is that of Harting, under the name of Orthago- 
riscus ozodura, in the Transactions of the Academy of Amsterdam for 
68. An intermediate stage between the young and the adult, mm fig- 
ured, is represented by the figures of Bloch, Donovan, and Yarr 
Dr. R. D read a paper before the Section of Microscopy ‘On. 
the Illumination of Binocular Microscopes.” The object of this paper is 
ot 
the opticians, has brought into existence the sumptuous first-class stands 
and their elaborate accessories, but to make some suggestions in the in- 
terest of that larger class, microscopical amateurs, who, incidentally to 
, 9f the market, and their choice of apparatus, and consequent success in 
Work, e xt. upon the chances of trade and the interested par- 
tiality of dea 
It is not ipie but unfortunate, that this class of apparatus, students' 
— Vei ao of these fish will be discussed in full in the Memoirs of the Academy. The 
nam: 
Mr. Pata s paper will be ! published Ri full m a future number of the Memoirs ot the 
Peabody Academy p 
in this a nns 
AMER. NATURALIST, VOL. IV. 80 
