Fronto-orbital border about half the greatest breadth of the eai'apace. Front horizontal, or 

 obliquely deflexed, about one-fifth the extreme breadth of the carapace, quadrilobed or quadridentate, 

 the two middle teeth slightly the more prominent. 



Supra-orbital margin with two suture lines or fissures, of which the outer one is sometimes hardly 

 discernible : inner angle of lowei- border of orbit usually dentiform and prominent. 



The antennules fold nearly transversely. The antennas occupy the widely-open orbital hiatus : 

 The basal joint is short and is not fixed down, the second joint reaches the front, the flagellum 

 is long. 



Buccal cavern square, the efferent branchial channels well defined by ridges : external maxillipeds 

 large, completely closing the buccal cavern, the anterior border of the merus somewhat oblique and 

 arched. 



Chelipeds subequal, massive, fingers strong and pointed. 



Legs long, stoutish, more or less compressed, ending in stout, bare, styliform dactyli. 



Abdomen in both sexes seven-jointed and completely covering the sternum at its base. 



Gen/on qffinis, Milne Edwards and Bouvier. 



Geryon affinis, A. Milne Edwards et E. Bonvier, Result. Camp. Sci. Hirondelle, Bracliyures et Anomoures, p. 41, 

 pi. i. (Monaco, 1894). 



One specimen, a female with a carapace nearly 4-5 inches long and 5 inches broad, fi-om off the 

 Travancore coast, 224-284 fms. It is absolutely identical with the species di-edged off the Azores at 

 about 3-10-770 fathoms, and unmistakeably described and figured by MM. Milne Edwards and Bouvier. 

 To those who know how many species are common to the like depths of the two regions its occurrence 

 here will cause no surprise. 



Carapace slightly broader than long, little convex, its surface rugulose or pitted, especially on the 

 branchial regions, its regions fairly well defined, the gastric region convex and obscurely divided into 

 three sub-regions. 



Front about one-fifth the greatest breadth of the carapace, obliquely deflexed, lamellar, cut into 

 4 teeth of which the middle two are the most prominent. 



Antero-lateral borders with five prominences or teeth (including the outer orbital angle) of which the 

 1st, 3rd, and 5th are the most pronounced : a broad low ridge extends from the last tooth right round 

 the inner limit of the branchial region on either side. 



Orbits large, not completely filled by the eyes : of the two breaks in the upper margin the inner is 

 a distinct fissure while the outer is a mere crease : the inner angle of the lower border is prominent 

 and acutely dentiform. 



The external maxillipeds fall a little short of the edge of the epistome, the surface of their 

 isehiopodite, like that of the neighbouring part of the pterygostomian regions is rugulose or pitted. 



Chelipeds slightly unequal : all surfaces of the hand, the outer surface of the wrist and part of the 

 outer surface of the arm are marked with low sub-squamiform rugulosities : the upper border of the arm 

 ends, some distance behind the end of the joint, in a spine, and the inner angle of the wrist is strongly 

 ^^piniform : the fingers are longer than the palm and their apposed teeth are strong and interlock closely. 



The gressorial legs are stout, and their surfaces are pitted : they end in stout styliform dactyli 

 which are grooved along both the dorsal and the ventral surfaces. 



The colours in life are admirably shown in the figure given by MM. Milne Edwards and Bouvier. 



