AUSTBALIAN MA1AC0STBACA. 195 



363. Leander uatator. 



Palcemon natator, M.-Edw., Hist. Nat. Crust., t. ii., p. 293 

 (1837). 



Leander erraticus, Desmarest, Ann. Soc. Ent. Prance, p. 87 

 (1849). 



Leander natator, Miers, Cat. Crust. N.Z., p. 86 (1876). 



Rostrum about the length of the basal scale of the external 

 antennae, narrow at base, but very wide at the end, almost lance- 

 shaped, with eleven or twelve teeth above, scarcely dentate 

 below. Second pair of legs of moderate length, very slender 

 towards the base, but narrowing to the extremity ; palms ovoid ; 

 fingers slender and straight to near the end. Last abdominal 

 segment terminating in three spines and two rather long bristles. 

 Length about li in. \M.-E.~] 



"Widely distributed. 



364. Leander intermedins. 



Leander intermedins, Stimpson, Proc. Acad. Nat. Sci. Philad., 

 Vol. xii., Sp. 464. 



Branchiostegal spine long, very acute, situated far back, near 

 the margin. Rostrum slender, reaching beyond the appendages 

 of the antennae, reflexed, with seven teeth above (the third tooth 

 above the eyes), quadridentate below, the apex bifid or bidentate 

 Eyes large. Antennules not shorter than the body, the two 

 external flagella joined throughout half their length. External 

 maxillipedes scarcely extending beyond the peduncle of the 

 antennae. Second pair of feet extending a little beyond the 

 appendages of the antennae, hand a little thickened, carpus 

 scarcely longer than the fingers. Posterior feet moderate, 

 sparsely armed with spines, dactyli rather long. Pellucid, 

 marked with yellow lines, and sometimes sparsely dotted with 

 black. Length 1 in. [Stiimps.] 



Port Jackson. 



365. Leander serenua. 



Leander serenus, Heller, Reise der Novara, Crust., p. 110, 

 pi. x., fig. 5. 



Carapace smooth. Rostrum extending a little beyond the 

 appendices of the antennae, ensiform, a little reflexed at the 

 apex, with a straight superior crest, armed with 9-11 teeth placed 



