Crustacea fi-om the Gulf of Ahaba. 407 



Carpilius convexus. 



Cancer convexus, Forskal, Descript. Animal, p. 88 (1775). 



Carpilim convexus, Ruppell, Beschreib. Ki-abben rothen Meeres, p. 13, 

 pi. iii. fig. 2 (1830) ; M.-Edwards, Hist. Nat. Crust, i. p. 382, pi. xvi. 

 figs. 9, 10 (1834) ; A. M.-Edw. Nouv. Arch. Mus. Hist. Nat. i. p. 215 

 (18r35) ; HeUer, Sitzungsb. .fee. xliii. 1, p. 319 (1861). 



Carpilms lividus, Gibbes, Proc. Amer. Assoc, p. 174 (1850). 



One specimen, a female in fine condition, is in the collection. 



There can be little doubt that the G. lividus of Gibbes, 

 based on Sandwich-Island specimens, is identical with this 

 species, although his description is very short. Specimens 

 in the British-Museum collection prove that the range of 

 C. convexus extends to that locality. 



I take this opportunity of noting that the Carpilius proeter- 

 niissus of the same author (I. c.) seems to be identical with 

 Liagore ruhromaculata, De Haan. 



Zozymus ceneus. 



Cancer eemus, Linn. Mus. Lud. Ulr. p. 451 (1764) ; Syst. Nat. p. 1048 



(1766). 

 Cancer amphitrite, Herbst, Nat. Krabben u. Krebse, iii. (pt. 2) p. 5, 



pi. liii. fig. 1 (1801). 

 Zozt/mus ceneus, M.-Edw. Hist. Nat. Crust, i. p. 385 (1834) ; Dana, 



U.S. Expl. Exp. xiii. Crust, i. p. 192, pi. x. fig. 3 (1852) ; Heller, 



Sitzungsb. xliii. 1, p. 326 (1861). 



Two specimens, males, were collected. 



Trapezia ferruginea. 



Trapezia ferruginea, Latreille, Encvcl. Meth. Hist. Nat. x. p. 695 

 (1825) ? ; M.-Edw. Hist. Nat. CVust. i. p. 428 (1834) ? ; Heller, 

 Sitzungsb. Akad. Wien, xliii. 1, p. 349, pi. iv. fig. 40 (1861). 



Trapezia cwrulea, Riippell, Beschreib. Krabben rothen Meeres, p. 27, 

 pi. V. fig. 7 (1830) ; nee Heller, /. c. p. 348 (1861). 



Grapsillus suhinteger, M'Leay, Zool. S. Africa, Annulosa, p. 67 (1838). 



Trapezia crpnodoce, Dana, U.S. Expl. Exp. xiii. Crust, i. p. 25, pi. xv. 

 fig. 5 (1852); Heller, /. c. p. 352 (1861), nee Herbst. 



? Trapezia miniata, Jacq. & Lucas, Voy. Pole Sud, Zool. iii. Crust, 

 p. 43, pi. iv. fig. 10 (1853). 



Trapezia subdentata, Gerstaecker, Arch. f. Nat. xxii. p. 127 (1856). 



Two specimens, male and female, were collected. These 

 have the carapace of a bluish-grey colour, and the limbs of a 

 reddish brown. The teeth of the lateral margins are small 

 and blunt, the frontal teeth not much developed, and the arms 

 have 5-7 teeth on their anterior margins. The hands are 

 rounded above and naked on their outer surface. 



The discrimination of the species of this genus is very 

 difficult ; and I was at first inclined to unite under the name 

 of Trapezia cymodoce^ Herbst, all the specimens in the British- 



