obtained in the Indian Seas. 257 



and falls short of the raised anterior edge of the afferent 

 branehial eanal by a distance equal to about half the length 

 of the merus. 



The chelipcds are long, about twice the length of the 

 carapace; the distal half of the hand is very slender ; the 

 fingers are about two thirds the length of the palm and are 

 iiliform. 



The abdomen of the adult male (female unknown) consists 

 of five pieces, the third, fourth, and fifth segments having 

 coalesced ; in the young specimen the sutures are still 

 visible. 



Three specimens (one large and two small males) were 

 taken at Sta. 29.2, Persian Gulf, mud bottom, 53 fathoms. 

 The largest gave the following measurements : — 



mm. 



Length of carapace 29 



Breadth, iiickiding lateral processes 62"5 



Length of lateral process 14'5 



Only one cheliped is present in the large specimen, and 

 that one has had the tips of the fingers broken off; but one 

 of the smaller specimens has a complete cheliped, wdiieh 

 shows the following characters : — The cheliped is slightly 

 more than twice the length of the carapace ; the fingers are 

 w ell under half the length of the hand, are slightly hooked 

 at the tip, and have their prehensile edges closely set with 

 small microscopic jagged teeth, and at regtilar intervals a 

 few larger and recurved teeth. This specimen gives the 

 following measurements : — 



mm. 



Length of carapace JO 



„ cheliped 20^ 



„ palm 50 



,, free finuer o'8 



This species has been figured for "Illustrations of the 

 Zoology of R. I. M.S. ' Investigator. 



.' }} 



Fam. Dorippidas. 

 Ethusa, Roux. 



Ethusa hirsuta, McArdle. 



Ethusa hirsuta, INfcArdle, Ann. & Mag. Nat. Hist. ser. 7, vol. vi., 

 Nov. 1900, p. 474; IlUis. Zool. Invest., Crust, pi. lix. ligs. 2, 2 a. 



This species was described by McArdle from an adult 



