88 NEW-YORK FAUNA. 
(EXTRA-LIMITAL.) 
Genus Siren, Linneus, Auct. Body eel-shaped. Two anterior legs. ‘Teeth in the palate and jaws. 
Oss. The two last species of this genus have been arranged by some authors under the genus 
Pseudobranchus. 
S. lacertina. Black above; dusky beneath. ‘Toes four. Length two to three feet. South Carolina, 
Florida. 
S. intermedia. (Le Contr, Ann. Lye. Vol. 2, pl. 1.) Similar to the preceding, but smaller. Gills 
included in a fleshy trilobate covering. Length, one foot. 
S. striata. (Ip. Ib. Vol. 1, pl. 4.) Dusky, with two longitudinal stripes on each side. Gills as in the 
preceding, Length, seven to nine inches. 
FAMILY AMPHIUMID/:. 
Body long, formed for swimming. Feet four. Cranium solid. Tail compressed. Respv- 
ration by means of lungs only. No gills, but only cervical orifices. No metamorphosis 
known. 
This family is equivalent to the order Abranchia of Bell, and to the families Menopomatide 
and Amphiumide of Hogg and Bonaparte. 
(EXTRA-LIMITAL.) 
Genus Ampuruma, Garden, Harlan. Body eel-shaped. Head and neck continuous. Legs feeble, 
rudimentary, with two or three jointless toes. No ribs. Two rows of teeth in the upper, and 
one in the lower jaw. 
A. means. (Harvan, Ann. Lyc. Vol. 1, pl. 22.) Dark brown. Feet bifid at the extremities. Length 
one to three feet. South Carolina to Mexico. 
A. tridactylum. (Cuvier, Tr. Acad. Se. 1826, pl.) Similar to the preceding. Feet trifid. Alabama, 
Arkansas. 
GENUS MENOPOMA. Harlan. 
Body robust. Head distinct from the neck. Tail broad, compressed. Lower jaw with a 
single row of teeth; upper jaw with an additional row. Ribs rudimentary. Legs stout, 
with four toes before and five behind. 
Oxs. This genus was first distinctly established by Dr. Harlan, under the name of Abran- 
chus, which having been discovered to be predccupied, he changed it to Menopoma. Others 
have proposed new names either erroneous in themselves, or unaccompanied with descriptions. 
Such are those proposed, but not defined by Prof. Barton, under the names of Salamandra 
horrida, gigantea, maxima, and Protonopsis horrida. 
