1900.] A. Aloock — CarcinoJoyical Fauna of India. 4.39 



Liolophus, Miers. 



Leiolophus, Miers, Cat. Crust. New Zealand, p. 46 (1876), and Ann. Mag. Nat. 

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



Acanthopus, De Haan, Faun. Japon. Crnst. p. 29: Dana, U.S. Expl. Exp. Crust. 

 pt. I. p. 372 : Milne Edwards, Ann. Sci. Nat., Zool., (3) XX. 1853, p. 180 (worn, prseocc). 



As in Plagusia, the antennae 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 difference 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 

 the meropodites are broad they are very thin : the copulatory 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 5th 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. Liolojphus planissimus (Hbst.). 



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



Cancer planissimus, Herbst, Krabben &c. III. iv. 3, pi. lix. fig 3 (1804). 



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

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

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

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

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

 Crust. Guadaloupe, p. 50 : Richters in Mobius' Meeresf. Maurit. p. 157. 



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



Acanthopus planissimus, De Haan, Faun. Japon. Crnst. p. 30 : Dana, U. S. Expl. 

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

 SB. Ak. Wien, XLIII. 1861, p. 364 : Stimpson, Ann. Lye. Nat. Hist. New York, VII. 

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

 Mus. IX. 1873, p. 299 : Brocchi, Ann. Sci. Nat., Zool., (6) II. 1875, Art. 2 {male appen- 

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



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



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



Leiolophus planissimus, Miers, Cat. Crust. 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, 545 : 

 J. II 57 



