412 THE DECAPODA COLLECTED BY THE " HUXLEY " FKOM THE 



carpus are nearly equal in length, each being about one and a half 

 times as long as the chela. The second pair is characterised by the 

 very long but comparatively slender chela, which is twice the length 

 of the merus. The carpus is very short, about one-third the length of 

 the merus, and the dactyl us is half the length of the palm. The 

 dactylus is strongly curved and sharply pointed apically ; it bears a 

 prominent longitudinal carina on either side and a sharp tooth in- 

 ternally in the middle of its basal third. The fixed finger is carinate 

 along its internal aspect only, and bears, in its basal third, two teeth, 

 lietween which the dactylar tooth fits when the claw is closed. In the 

 last three pairs of pereiopods the propodus is slightly longer than 

 the merus, the carpus is three-fifths the length of the propodus, and 

 the dactylus is very short, simple, curved, and claw-like. 



Crangonid.^. 



Crangon Allmanni, Kinahan. 



Station II. 75 fathoms. Nine, 18-26 mm. 



V. 109 fathoms. Many, 14-25 mm. 



XL 146 fathoms. Many, 12-27 mm. 



The capture of this species on the north side of the Bay of Biscay 

 in 146 fathoms establishes new records both for its horizontal and 

 bathymetric distribution. G. AUmanni had not hitherto been found 

 south of the British Isles, and was not previously known from depths 

 exceeding 100 fathoms. 



The small size of the specimens seems to indicate that the species 

 is unable to attain its maximum development in deep water. 



Philocheras* echinulatus, M. Sars. 

 Station IX. 240 fathoms. Forty-eight, 14-34 mm. 

 ,, XII. 246 fathoms. Many, 14-35 mm. 



This species was not previously known as far south as the Bay 

 of Biscay. 



Philocheras bispinosus, Hailstone, var. neglectus, G. 0, Sars. 



Station II. 75 fathoms. Two, 11*5 mm. 



These two specimens show no trace of the brown pigment which is 

 sometimes such a prominent feature of the var. neglectus when living. 

 The surface of the carapace and abdomen is, however, without trace of 

 tubercles, and is pitted with microscopic punctuations exactly as in the 

 forms with transverse brown bands. 



* Philocheras, Stebbiiig, no7n, nov. vice Cheraphilus. 



