Crustacea fri>m the Samoa Islands. ,'343 



Alp/tens lineifer^ sp. n. 



Slender. Frontal margin of carapace entire. Beak narrow, 

 triangular, acute, arising between the bases of the eyes. Scale 

 of the external antennae acuminate, reaching beyond the 

 peduncle of the inner antennas. Anterior legs with the larger 

 (right) hand suboblong, not contorted, margins rounded, smooth, 

 but with a faint incised line extending longitudinally along the 

 upper surface of the hand for about two thirds of its length, 

 and thence backward obliquely across the outer surface ; a 

 transverse groove along the upper surface near the base of the 

 mobile finger, and a triangular notch on the lower surface at 

 the base of the immobile finger. Left anterior leg small, with 

 a spine at the infero-distal extremity of the arm. Fingers of 

 both hands hairy. Terminal segment and caudal appendages 

 small, ciliate. Colour pale yellowish pink, hands of a deeper 

 orange-pink ; finger of larger hand black at base, white at 

 tip. 



Length f inch. 



Hob. Samoa Islands. 



This species may be distinguished from all the others of the 

 genus, in which the beak rises between the bases of the eyes 

 and the front is entire, by the form and sculpture of the larger 

 hand. 



Palmmon gracilirostris, sp. n. 



Carapace smooth, rounded above. Beak very slender, not 

 reaching to the extremity of the peduncle of the inner antennas ; 

 upper margin convex, with ten teeth, of which seven form a 

 longitudinal series posterior to the eyes, and extending back- 

 ward over more than half the carapace ; lower margin with 

 two teeth, apex bifid. Scale of the external antennas large, 

 reaching beyond the end of the peduncle of the internal an- 

 tennas. Second pair of legs reaching to about the end of 

 the flagella of the internal antennas, slender, scabrous ; wrist 

 scarcely longer than palm ; fingers hairy, about as long as the 

 palm, without teeth on the inner margins. 



Length between tip of beak and end of terminal segment 

 24 inches. 



Hah. Samoa Islands, Upolu. 



This species may be distinguished from all the others of 

 the genus which have the wrist shorter than the hand, by the 

 remarkably slender rostrum, the apex of which is minutely 

 bifid at the extremity. It appears to be nearly allied to P. 

 boninensis of Stimpson (Proc. Acad. Nat. Sci. Philad. 1860, 

 p. 41) — which has more numerous teeth on the rostrum, and 

 the inner margins of the fingers toothed. 



