CGO - MR. E. J. MIEES ON THE 



§§ Anterior legs toitli tlie fingers excavated at ilie tips. 



ScHizoPHETS, White (Dione, De Haan, nom. prseoc). Cara- 

 pace orbiculate-triaugular or rarely elongated. Spines of rostrum 

 distinct, with one or more accessory spines upon their outer mar- 

 gins. Orbits large. Basal joint of antennae rather slender, with 

 two spines at its distal end. Type ScldzopJirys aspera (Milne- 

 Edwards). 



Tlie fingers are acute and not excavated in S. dama (Herhst), 

 a species which differs from others of the genus in its more elon- 

 gated form, and approaches the Maiidse. 



Ctclax, Dana. Carapace orbiculate or oblong-orbiculate. 

 Spines of rostrum simple, very short or rudimentary. Orbits 

 large. Basal joint of antennae usually much enlarged. 



The accessory spines of the rostrum of Scliizophrys constitute 

 the only positive distinction (although an arbitrary one) that can 

 be employed to separate the species of that genus from Gyclax 

 and Nemausa. 



Subgenus 1. Ctclax, Dana. Spines of rostrum longer. Eye- 

 peduncles longer. Basal joint of antennae slenderer, with two 

 spines at its distal end. Type Gyclax Perryi, Dana. 



Subgenus 2. Ctclomaia, Stimpson. Spines of rostrum rudi- 

 mentary. Eyes large. Basal joint of antennae very broad, with 

 three spines at its distal end. Type Cyclomaia sulorlicularis, 

 Stimpson. 



(The genus ^' Pleioropliricus of Alphonse Milne-Edwards, founded 

 upon a species, P. crisfatipes, from Australia (Journ. Mus. Godef- 

 froy, iv. p. 84, pi. xii. fig. 6, 1873), is placed by that distinguished 

 carcinologist among the Osyostomata; but judging from the de- 

 scription and figure of the third maxillipede, I should certainly 

 suppose its true position to be in this subfamily of the Oxyrhyncha. 

 It is distinguished from Gyclax, ScJiizopJirys, and Temnonotus by 

 the anterior legs, which are short and somewhat enlarged, and 

 by the front, which is quadridentate.) 



Subfamily 3. Micippin^. (See Plate XIII. figs. 1, 2, 3.) 



Carapace suboblong. Rostrum verticallj^, or nearly vertically, deflexecl, 

 usually broad, lamellate. Anterior legs with the fingers acute at tips. 

 Basal antennal joint very much enlarged. Eye-peduncles very long, geni- 

 culated, and laterally projecting. 



