GALACANTHA DIOMEDE. 79 
The “Albatross” specimens differ constantly from the typical West 
Indian form in the following particulars: The spines at the antero-lateral 
angles of the carapace are more divergent, the anterior spine being more 
nearly parallel with the axis of the body; the posterior spine is relatively 
longer; the abdomen is smoother toward the central part of the segments ; 
the dorsal spine of the fourth abdominal segment is smaller. In other re- 
gards there is considerable variation among different individuals. The color 
in life is orange-red, fading into pale yellowish on the carapace and abdomen. 
The characters pointed out by Henderson* to separate G. dellis from 
G. rostrata can hardly be deemed of specific value, nor does it seem probable 
that G. talismaniit is anything more than individual, age, or perhaps local 
variation of the same species. G. ¢adismanii is a manuscript name of A. Milne 
Edwards's ; but this writer appears to have abandoned its claims to recogni- 
tion as a valid species, since it is not included in his enumeration of the 
known species of Galacantha given in the “ Considérations Générales sur la 
Famille des Galathéidés.” + Finally, as far as can be determined by Wood- 
Mason’s short description, G. areoluta§ differs from G. rostrata chiefly in the 
coarser granulation of the carapace, and may perhaps be viewed to more 
advantage as an East Indian race of G. rostrata. If my suspicions concerning 
the relationship of the above-named forms be well founded, we behold in 
G. rostrata «a somewhat variable abyssal species of world-wide distribution, 
represented on both sides of the Atlantic, off the Pacific coast of America, 
in the Banda Sea, and in the Bay of Bengal. 
The typical form of G. rostrata comes from the West Indian region, 1098— 
1591 fathoms. It has been figured by 8. I. Smith. || 
Galacantha diomedee Fax. 
Plate XX V. 
Bull. Mus. Comp. Zodl., XXIV. 180, 1893. 
Rostrum 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 ; 
* Ann. Mag. Nat. Hist., 5th Ser. XVI. 418, 1885; Rep. Challenger Anomura, p. 167, Plate XIX. 
Fig. 6, 1888. 
+ Henderson, Rep. Uhailenger Anomura, p. 167, Plate XX. Fig. 1, 1888. 
+ A. Milne Edwards et Bouvier, Ann. Sci. Nat., Zool., 7¢™* Sér., XVI. 270, 1894. 
§ Ann. Mag. Nat. Hist., 6th Ser., VIT. 200, 1891. 
|| Bull. Mus. Comp. Zodl., Vol. X., No. 1, Plate IX. Fig. 2, 2%, 1882; Ann. Rep. U. 8. Fish Comm. 
for 1885, Plate VI. Fig. 1, 17, 1886. 
