54 A. Alcock — Garcinological Fauna of India. [No. 1, 



30. Charybdis ( Goniosoma) quadrimaculata, A. M. Edw. 



Goniosoma quadrimaculatum, A. Milne Edwards, Archiv. du Mus, X. 1861, pp. 

 375, 385, pi. xxxir. fi^, 3 : Ortmann. Zool. Jahrb., Sysfc., VII. 1893, p. 82. 



Goniosoma quadrimaculatum, A. M. Edw. Portunus lucifer Fabr., de Man, 

 Jonrn. Linn. Soc, Zool. XXII. 1887-88, p. 8S footnote. 



Goniosoma luciferum, J. R. Henderson, Trans. Lian. Soc. Zool., (2) V. 1893, 

 p. 374. 



Differs from C. crucifera in the following particulars: — 

 (1^ the carapace though in sculpture of surface similar, is very 

 much broader, its length being much less than two-thirds its breadth : 



(2) the frontal teeth are deeper cut and those of the second pair 

 slope outwards rather more : 



(3) the teeth of the antero-lateral borders are regular and are 

 claw-shaped, instead of being broad anteriorly-acuminate lobes ; the 

 first is acute and except in its smaller size is similar to the next four, 

 and the last is more spine-like and more prominent : 



(4) the orbits are smaller, their diameter being only two-sevenths 

 the width of the inter-orbital space ; both the inner angle and the lobule 

 at the outer end of the lower border are acutely dentiform : 



(5) the chelipeds in the male are not very much more than twice 

 the length of the carapace ; the hand is 6-costate and the costse are 

 commonly milled in their proximal half, and there are 5 spines on the 

 upper surface of the hand; the fingers of the larger cheliped are shorter 

 than the palm : 



(6) in the last pair of legs the merus is nearly twice as long as 

 broad, and the posterior border of the propodite is strongly serrated 

 throughout : 



(7) the 6th tergum of the male abdomen has its sides parallel or 

 even slightly divergent in at least two-thirds of its extent : 



Colours in spirit yellowish brown with 2 large white spots on 

 either branchial region. 



In the Indian Museum are 20 specimens from all parts of the coast 

 of the peninsula : the carapace of the largest specimen is 60 millim. 

 long and 98 millim. in extreme breadth. 



31. Charybdis {Goniosoma^ annulata (Fabr.) A. M. Edw. 



Portunus annulatus, Fabrioius, Enfc. SyBt. Suppl. p. 364 {sec. A. Milne Edwards.). 

 .''.'' Cancer fasciatus, Herbst Krabben, III. i. 62, pi. xlix. fig. 5. {sec. A. M. Edw). 

 f Cancer sexdentatus, Herbst, Krabben, pi. vii. fig. 52. 



Portunus annulatus, Latreille, Hist. Nat. (Jrust. VI. p. 15 {sec. A. Milne Edwards). 

 Thalnmita annulata, Milne Edwards, Hist. Nat. Crust. I. 463 {sec. A. M. Edw.). 

 Goniosoma annulatum (Fabr.), A. Milne Edwards, Archiv. du Mus. X. 1861, 

 pp. 374, 385 : Miers, Ann. Mag. Nat. Hist. (5) V. 1880, p. 238 : de Man, Notes Leyden 



