MONTAGUA. 
53 
AMPHIPODA. 
NATATORIA. 
ST EG 0 CEP HA L I DES. 
Genus— MONTAGUA. 
Montagna , Spence Bate, Report Brit. Assoc. 1855, p. 57. Synopsis Brit. 
Amph. Ann. Nat. Hist. 1857, xix. p. 137. Cat. Amph. Brit. 
Mus. p. 54. White, Pop. Hist. Brit. Crust, p. 166. 
Leucothoe, Kroner (not Leach), Nat. Tids, iv. p. 141 (2), i. p. 539, 1845. 
Generic description. Antennae subequal. Superior pair with- 
out a secondary appendage- Gnathopoda subchelate. Coxa of 
second pair covering those of the first. Telson entire. 
The antennae are nearly equal in length : the superior 
do not possess a secondary appendage. The mandibles 
are without an articulated appendage. The foot-jaws 
are without squamous plates, and terminate in a hook. 
The two anterior pairs of legs are unequal, subchelate; 
the first pair having the first joint not squamiformly 
developed ; the second pair are larger than the first, 
having the first joint squamiformly developed to con- 
siderable dimensions, and overlapping that of the first 
pair. The remaining legs are subequal. The coxae of 
the three last pairs are small. The caudal appendages 
are styliform, the last pair having but a single branch, 
which is double-jointed. The terminal scale is squamous 
and entire. 
This genus is named after Colonel Montagu, who was 
a worthy pioneer in this branch of Zoology, and the 
discoverer of the first species. 
