Carcinological Fauna of India. 439 



LiOLOPUus, Miers. 



Leiolophug, Micrs, Cat. Crust. New Zealaud, p. 46 fl87G), and Ami. Maj^. Nat. 

 Hist. (5) T. 1878, p. 153. 



Acanthopus, Do tfaan, Faun. Japon. Crust, p. 29: Dana, U.S. Expl. Exp. Crust. 

 pt. I. p. 372 : Milne Edwards, Ann. Sci. Nat., Zool., (3) XX. 1853, p. \SO{nom. -prxocc). 



As ill Plagnsia, the autenuse fold nearly vertically in deep slits — 

 visible in a dorsal view — cut in the anterior border of the carapace, the 

 slits dividing the interorbital space into three deep lobes ; and the 

 exognath of the external maxillipeds has no flagellum. 



The diffei'ence from Plagusia is as follows : — 



The carapace is extremely flat and depressed — being quite disk- 

 like — and is longer than broad : the interantennular septum is of no 

 great breadth : the epistome is almost linear : the merus of the external 

 maxillipeds is very small, being much narrower than the ischium, and 

 is disposed obliquely in repose : the chelipeds and legs, though in 

 places spiny, are not rugose: the legs are much slenderer, and though 

 tlie meropodites are broad they ai-e very thin : the copulatoi'y organ 

 of the male ends in a claw : finally, the exognath of the external maxil- 

 lipeds is extremely short and slender. 



As in the Indian species of Plagusia, the abdomen of the male 

 consists of 5 segments, the 3rd 4th and 6th being fused. The abdomen, 

 of the female is similar in this respect to that of the male, 



Distribution : as Plagusia, but not in the Mediterranean. 



125. Liolophus pkmissimus {Hhsi.). 



Cancer planipes, Seba, Thesaurus III. p. 49, pi. xix. fig. 21 (1758). 



Cancer 'planissimus, Herbst, Krabben &c. III. iv. 3, pi. lix. fig 3 (180-i). 



Plagusia clavimana, Latreille, Gen. Crust, p. 34 : Lamarck, Hist. Nat. Anim. 

 Sans Vert., Crust., p. 247 : Desmarest, Diet. Sci. Nat. XXVIII. p. 246 : Latreillo, 

 Encycl. Method. X. p. 146: Desmarest, Consid. Gen. Crust, p 127, pi. xiv. fig. 2: 

 Milne Edwaids Hist. Nat. Crust. II. 92, and in Cuvier, Regne Animal, Crust, pi. 

 xxiii. fig. 3 : Hess, Archiv f. Nat. XXXI. 1865, i. p. 154 : Desbonno et Schramm, 

 Crust. Guadaloupe, p. 50: Richters in Mobiua' Mecresf. Maurit. p. 157. 



Plagusia serripes, Lamarck, loo. cit. : Latreille, Encycl. Method, loc. cit. 



Acanthopus j^lanissiimis, De llaan, Fann. Japon. Crnst. p. 30 : Dana, U. S. Expl. 

 Exp. Crnst. pt. I. p. 372 : Milne Edwards, Ann. Sci. Nat., Zool., (3) XX. p. 180 : Heller, 

 SB. Ak. Wion, XLIII. 1861, p. 3G4 : Stimpson, Ann. Lye. Nat. Hist. New York, VII. 

 1862, p. 232: Heller, Novara Crnst. p. 51 : A. Milne Edwards, Nouv. Archiv. du 

 Mus. IX. 1873, p. 299 : Brocchi, Ann. Sci. Nat., Zool., (C) II. 1875, Art. 2 (male appen- 

 dages) : Nauck, Zeits. Wiss. Zool. XXXIV. 1880, p. 31 (gastric teeth). 



Acanthopus clavimanus, Kranss, Sudafr. Crust., p. 42. 



Acanthopus Gihhesi, Milne Edwards, Ann. Sci. Nat. Zool. loc. cit. 



Leiolophus planissimus, Miers, Cat. Crnst. N. Z. p. 46, and Ann. Mag. Nat. Hist. 

 (5) I, 1878, p. 153, and P, Z, S. 1879, p. 38, and Zool. H, M. S. Alert, pp. 518, 515 : 



781 



