180 BULLETIN OF THE 



M . microphthalmia was taken by the " Blake " among the West Indies in 

 573-1030 fathoms, and by the " Challenger" in the same region in 390 fathoms, 

 north of the Kermadec Islands in 600 fathoms, and near Ascension Island in 

 425 fathoms. 



Galacantha rostrata A. M. Edw. 



Galacantha rostrata A. M. Edw., Bull. Mus. Comp. Zool., VIII. 52, 1880. 

 Galacantha bellis Hend., Ann. Mag. Nat. Hist., 5th Ser., XVI. 418, 1885; Rep. 

 Challenger Anomura, p. 167, Plate XIX. Fig. 6, 1888. 



Station 3362. 1175 fathoms. 1 male. 



" 3400. 1322 " 3 males, 2 females (1 ovig.). 



" 3413. 1360 " 1 female. 



The "Albatross" specimens differ from the typical West Indian form in the 

 greater divergence of the lateral spines, the anterior being more nearly parallel 

 with the axis of the body ; the abdomen is smoother toward the central part 

 of the segments ; the dorsal spine of the fourth abdominal segment is smaller. 

 There is considerable variation among different individuals, and the characters 

 pointed out by Henderson to distinguish G. bellis can hardly be deemed of spe- 

 cific value. The color in life is red, paler and yellowish toward the middle of 

 the carapace. G. rostrata has been collected in the West Indian seas in from 

 1098 to 1591 fathoms, and off Juan Fernandez in 1375 fathoms ((?. bellis 

 Hend.). 



Galacantha diomedeae, sp. nov. 



Eostrum without lateral spines; distal part turned upward at an angle of 

 less than 95° in most specimens, but in some cases the inclination is greater; 

 basal part marginate, the margin running for some distance along the anterior 

 edge of the carapace ; a slight keel runs back from the rostrum to the median 

 gastric spine. Gastric spine smaller than in G. rostrata; anterior lateral spine 

 much longer than the posterior; there is an additional small spine on the side 

 of the carapace, just behind the cervical suture. Anterior half of the carapace 

 ornamented with setiferous squamous tubercles; on the posterior half of the 

 carapace the tubercles assume the form of interrupted transverse ridges. The 

 median spines of the abdomen are small, diminishing successively in size from 

 the first to the third, which is obsolete' in some examples. Upper surface of 

 abdomen rather hairy, the pleurae tuberculose, angles rounded. The legs are 

 rough with granular setose tubercles. There are two prominent spines at the 

 distal end of the carpus of the chelipeds, and one at the distal end of the carpus 

 and merus of the ambulatory limbs. The antennae are twice and a half as long 

 as the body. 



Dimensions of a female specimen. Length of body, 79 mm.; length of cara- 

 pace, 39 mm. ; breadth of carapace, not including the lateral spines, 25 mm. 



This species runs into a well marked variety, in which the anterior lateral 

 spines, as well as the median gastric spine, are very much smaller than in the 



