from Massachusetts Bay. 195 
same depth as the dentata, their stomachs contained 
only the Nucula limátula, Fusus córneus, Nática triser- 
tata and Nassa trivittàta. The specimens of the planus 
were taken at Cape Ann; but the distance of forty 
miles, between Cape Ann and Provincetown, would not 
account for this shell not being found in both fishes. 
The two species, it is seen by the above remarks, are 
similar in their voracity ; but one of the principal char- 
acters of the dentàta is its uncommonly large mouth, 
while the mouth of the planus is very small. So that 
if the N. thracieformis should be found in the stomach 
of the planus, they will probably be immature shells. 
During the ensuing season, I contemplate laying before 
the Society a paper upon the habitats of some of the 
mollusea of our waters ; as, during my ichthyological in- 
vestigations, undertaken in behalf of the State of Massa- 
chusetts, I have been enabled, by examining carefully 
our fishes, to ascertain the depths at which several of 
them are usually found—and in what species of fish we 
may expect to find certain species of mollusea. 
Norr. Misled by Mitchill’s description of the specific characters 
of the eae pas: I "une de pnm taken at Cape Ann, 
to be fish that it is a new species, 
I us propose for it de name of P . ferrugi 
Specific characters. Body smooth ; right side of a reddish slate color, 
with a great number of irregularly fied ferruginous spots. Mouth 
small; lips tumid. Lateral line making a high arch over pect 
This species more nearly resembles the Platessa limanda udi ) than 
any other fish. From that, however, it differs in bei 
having its teeth closely set together ; and in the length of ibi pectoral 
fins compared to the length of the head, they being in the 
much shorter than in the limanda. A minute description of this spe- 
cies will eee in the Ichthyological Report prepared for the State. 
