South African Crustacea. 13 



pictus. He gives after the Linnean name references to Petiver, 

 Catesby, and Herbst, and adds to the synonymy " Cancer tenui- 

 crustatus, Herbst, Cancr. 2, p. 113, t. 33, 34, with a reference to 

 Seba. He includes as a second species in the genus " Grapsus 

 depressus, n., Herbst, t. 3, f. 35, a. b.," since referred to Plagusia. 

 In his key to the Indian genera of Grapsidse, Alcock distinguishes 

 Grapsus and Geograpsus as having the front less than half the greatest 

 breadth of the carapace, while it is more than half that breadth in 

 Metopograpsus and Pocky grapsus. In the definition of Grapsus, 

 however, he speaks of the front as " about half the breadth of the 

 anterior border of the carapace." In a dried specimen of G. strigosus 

 from the Durban Museum the front is somewhat more than half the 

 greatest breadth of the carapace. 



GRAPSUS STRIGOSUS (Herbst). 



1799. Cancer strigosus, Herbst, Naturg. Krabben u. Krebse, vol. iii. 



pt. 1, p. 55, pi. 47, fig. 7. 



1802. Grapsus strigosus, Bosc, Hist. Nat. Crust., vol. i., p. 203. 

 1838. Goniopsis strigosa, M c Leay, Illustrations Zool. South Africa 



p. 66. 



1838. Goniopsis flavipes, M c Leay, loc. cit., p. 66. 

 1843. Goniopsis strigosa, Krauss, Siidafrik. Crust., p. 46. 

 1900. Grapsus strigosus, Alcock, Journ. Asiat. Soc. Bengal, vol. Ixix., 



pt. 2, p. 393. 

 1907. Grapsus strigosus, Stimpson, North Pacific Crust., Smithsonian 



Misc. Coll., vol. xlix., p. 118. 



The dried specimen already referred to has a carapace 28 mm. 

 long and 30 mm. broad. The largest of 76 specimens observed by 

 Alcock measured 59 mm. in length by 63 mm. in breadth. 



Concerning G. flavipes, M c Leay, Krauss says that it is only 

 distinguished by blood-red bands, and otherwise entirely agrees 

 with the description of G. strigosus, in company with which it is 



found. 



The Durban Museum specimen agrees in the colouring of the 

 walking legs with Herbst's figure. In the chelipeds the tooth at 

 the inner angle of the wrist is straight, in accordance with Alcock's 

 description. 



Miss Eathbun, in notes to Stimpson (loc. cit., p. 119), makes 

 Stimpson's Grapsus longipes a synonym of G. strigosus, to which 

 Stimpson himself admitted that it was closely allied. 



