CLASSIFICATION Or THE MATOID CEUSTACEA. 665 



Dana; Mslieria, Lockington). Carapace broadly triangular. 

 Spines of rostrum slender and more or less divergent. Branchial 

 spine small. Orbits not tubular. Anterior legs in male en- 

 larged ; fingers arcuate, and meeting only at the tips. Antennae 

 visible from above at sides of rostrum. Type Mierophrys hicor- 

 nuta (Latreille). 



(The genus Omalacantha of Hale Streets, of which I have seen 

 no specimen, is very closely allied to this genus, and ought 

 perhaps to be united with it, as M. A. Milne-Edwards has 

 pointed out. It is, however, stated by its author to be suffi- 

 ciently distinguished by the flattened club-shaped joints of the 

 antennas ; and I prefer, for the present, to regard it as distinct. 

 In the genus Perinea, Dana, which establishes the transition from 

 Microphrys to the next genus, the carapace is convex and the ros- 

 trum very short.) 



Maceocqsloma, Miers. Carapace very convex. Branchial 

 spine very large. Spines of rostrum parallel, or nearly so. Orbits 

 tubular and laterally projecting ; interorbital space very broad. 

 Anterior legs in male with the palm elongated, and fingers meet- 

 ing, or nearly meeting, when closed. Type Macrocceloma trisjoi- 

 Qiosa (Latreille). 



This genus is proposed for that section of the old genus Peri- 

 cera in which is included P. trispinosa and its allies. 



*Anapttchus, Stimpson (^Za, Lockington). Carapace broadly 

 triangulate, with the lateral margins laminated, produced over the 

 bases of the ambulatory legs, and regularly dentated. Spines of 

 rostrum short. Anterior legs in male rather slender ; fingers 

 nearly meeting throughout when closed. Type Anaptyclius cor- 

 nutiis, Stimpson. 



Subfamily 2. Othoniin^, (See Plate XIII. fig. 6.) (Othonince, Dana, 



Stimpson.) 



Carapace suhoblong ; interorbital space very broad. Rostrum slroost 

 obsolete. Second joint of antennae enlarged. Anterior legs with the 

 fingers slightly excavated at the tips. 



This subfamily is restricted to the single genus 



Othonia, Pell {Pitho, Bell). (Plate XIII. fig, 6..) Carapace 

 with the margins regularly dentated. Type Odlionia sexdentata, 

 Bell. 



