[13] DECAPODA FROM ALUATROSS DREDGINGS. 357 



whicli is very little stouter than the ischium and without prominent 

 teeth, having instead two or three small and low spiniform tubercles. 



The chelipeds are longer than the carapax including the rostrum, 

 rather stouter and much more spiney than in G.rostrata : the ischium, 

 merus and carpus are armed along the rounded angles and at the distal 

 ends with spines of which the dorsal and distal on the merus and car- 

 pus are large. The chela is longer than the merus, a third as broad as 

 long, the digits are stout and longer than the body of the chela, of which 

 the edges are rounded, the inner armed with two slender spines and the 

 outer with two or three short spiuules. The three pairs of ambulatory 

 perteopods are nearly alike, stout and longer than the chelipeds ; the 

 meri and carpi are spiney, as in the chelipeds, though the spines are 

 somewhat smaller; the propodi are rough, with short seta3, but not spi- 

 ney ; and the dactyli are stout, slightly curved, terminate in acute chi- 

 tiuous tips, and are armed along the lower edge with a series of spini- 

 form teeth. The posterior peraeopods are nearly as in G. rostrata. 



The pleou is about as broad as the carapax, only very slightly nar- 

 rowed posteriorly, and the dorsum is transversely rounded and devoid 

 of longitudinal carinae or teeth. The tirst and second somites have two 

 transverse ridges each on the middle of the dorsum, and there is a 

 single similar but less conspicuous ridge on the front edge of the third. 

 The lateral edges of all the pleura are obtusely rounded. 



The telson, uropods, and pleopods are as in G. rostrata. 



The eggs are of the same form and size as in G. rostrata. 



Measurements in millimeters. 



Length from tip of rostrum to tip of telsou 82. 



Length of carapax including rostrum 44. 5 



Length of rostrum 18. 



Greatest breadth of carapax including spines 25. 3 



Breadth at bases of antero-hiteral spines 19. 



Breadth at branchial regions 24. 



Length of eye-stalk including spine 5. 5 



Length of spine 1.8 



Diameter of eye 1.8 



Length of cheliped 50. 



Length of chela 18.5 



Breadth of chela 6. 4 



Length of dactylus 10. 8 



Length of first ambulatory perseopod G4. 



Length of propodus 17. 



Length of dactylus 12. 5 



Length of posterior perteopod 30. 



Length of telson 11.0 



Breadth of telson 14. 5 



Length of inner lamella of uropod 9. 3 



Breadth of inner lamella of uropod 7. 5 



Lengt h of outer lamella of lu-opod 10. 2 



Breadth of outer lamella of uropod 7. 5 



Station 210G, November G, north hit. oio iV 20", west long. 73° 03' 

 20", 1,497 fathoms, globigerina ooze, temperature 42^o. ><CG- \ Cy4 7~\ 



