452 THE ZOOLOGIST. 
teeth of the upper. This dentition could cope well with crus- 
taceans and even some molluscs. 
Umprina crrruosa.* Fig. II. 
There are nine gill-rakers from the angle of the first branchial 
arch forward that bear teeth, and five on the epibranchial, but 
two of these gill-rakers in each set are rudimentary. The first 
arch on its inner side, and the second, third, and fourth arches 
on both sides have tubercle gill-rakers; all of them carry teeth. 
The tubercles between the first and second arches interlace 
closely between the others; they have larger openings. The 
upper extremity of the second epibranchial carries a long narrow 
set of villiform teeth, quite palpable to the touch ; below these 
and on the inner side of the middle patch are some sharp conical 
teeth placed round the edges, with some prominent, almost 
granular, teeth in the centre of the patch. The lowest section 
of these upper pharyngeal teeth has sharp upstanding teeth. 
The lower pharyngeal teeth are granular-shaped ones, fairly 
thickly studded over the surface of the lower pharyngeal bones. 
The pharyngeal teeth show distinctly in the illustration. 
ANCYLODON JACULIDENS. | 
Has ten long, horny gill-rakers on the first cerato-hypo- 
branchial; these all bear teeth, with two on the first epi- 
branchial. The gill-raker at the angle is as long as the gill 
lamina below it. The other arches are but feebly provided with 
gill-rakers, having only a few tubercles on their upper margins. 
There is a small patch of upper pharyngeal teeth on the second 
epibranchial. On the third epibranchial there is a small patch 
of prominent teeth on the arm of this arch, and at the head of 
the arm a patch of strong cardiform teeth. At the head of the 
fourth epibranchial there is a patch of cardiform teeth, but 
smaller ones than those last mentioned as on the third epi- 
branchial. The lower pharyngeal teeth are likewise cardiform, 
with a row of extra strong ones along the inner margin of 
the set. 
* From the Mediterranean. 
+ From British Guiana. 
