1880.} Zoology. 675 
over the pericardial space to end in the rectum just over the 
middle of the adductor muscle. The liver, as is well known, dips 
into the folds of the walls of the stomach, but does not seein to 
follow the course of the intestine proper, which is provided in- 
ternally with a curious pair of longitudinal and parallel folds, which 
project into the intestinal cavity and extend from the pyloric end 
to very near the anus. The presence of these folds, gives to the 
fæcal matters their singular appearance, which is not in the forni 
of a cylinder as they leave the vent, but in the form of a tube with 
a part of one side removed. Tracing the course of the intestines 
by sections is not the proper way; they can be very easily dis- 
Sected out for their entire length by means of the scissors and 
forceps, 
The general likeness of this arrangement of the intestines to 
that of other Lamellibranchiates is apparent, but I was not pre- 
pared to find it return and cross over the mouth so very far for- 
wards. Prof. Brooks! apparently believes the intestinal coils to lie 
behind the stomach and liver, which is not the case according to 
the foregoing observations, nor is the use of the words “coils” 
and “convoluted intestine” admissible, since there is but one 
complete turn of the canal upon itself—¥% A. Ryder. 
PHOSPHORESCENCE OF VERY YouNG FisHes.—Whilst investigating 
the development of Cybium maculatum and Parephippus faber, or 
the bay mackerel and porgy, under the auspices of the United 
may be the cause of these phenomena. So striking is the resem- 
blance of these migratory superficial amceba-like cells to some of 
! Development of the American Oyster (Biological Studies from the Laboratory of 
: Johns Hopkins University, No. Iv), pp. 9-10. 
