946 Ayres's Description of a new Species, &c. 
pelled to limit our comparison to the bichir, as no description 
of the senegalus has yet been published. 
The arrangement of the teeth in the two species is quite 
different, the roof of the mouth being covered with them in 
the palmas, while in the bichir none are figured or mentioned 
on the vomer or sphenoid. 
The liver of the bichir has two distinct lobes united ante- 
riorly ; that of the palmas appears single, but on close exam- 
ination is seen to be slightly divided posteriorly. 
The single cecum is made by Valenciennes a generic char- 
acter; this, however, will require revision, as the — 
shows two cœca with perfect distinctness. 
It is worthy of remark, that while the number of lation 
species of Ganoid fishes in America has been recently in- 
creased by the researches of Prof. Agassiz, we are enabled to 
add also to the small list of those which inhabit Africa. 
That this list is complete, we cannot of course believe, and 
we trust ere long to extend it further, having directed the 
attention of correspondents to this genus in both West asd 
South Africa. 
EXPLANATION OF THE FIGURES. PLATE VI 
Fig. 1. Side vie 
Fig. 2: Outline, a: as seen from above 
Fig. 3. Inferior surface of the head, ‘to show the branchial pla 
Fig. 4. Superior surface of the hea d: The row of small ie on each side of 
= medial ones, descends so much upon the cheek that a portion of them in this 
ct are not seen, 
Mouth opened, "yon the teeth of thè vomer, belatites, &c. 
* Fig. Met of the pectoral 
Fig. 7. Scale from the eni line. "The hole with which it is pierced is riot 
dunn. as it is invisible by transmitted light. 
pi bot sacl organs, from beneath. a. . Stomach. b. Liver. ex vicos 
"what remains of the air vessel. appearance poate life we do not kno’ 
Fig. 9. A portion of the Mind — n such a position as to display -— 
cea. ` spi lei "- ers are the same in Fig. 8 , with the addition of e t0 
denote the shorter 
"The first two ures a are 5 slightly diminis sn seventh is ee the others 
aro of the natural size Ti iod 
ce 
