OK0 CRUSTACEA. 



and shows the emargination of the anterior margin of the buccal area, 

 at the termination of the efferent canal; it is somewhat triangular in 

 form, with the outer side rounded. There is a tooth below, on the in- 

 terior margin of the orbit, but it is not long and acute in this species. 

 The depressed line on the second joint of the outer maxillipeds is not 

 parallel with the inner margin. The third joint is about as long as 

 broad, and is somewhat rounded at the outer angle. 



This is a common species, and agrees with the cymodoce of Herbst, 

 as well as that of Guerin, in having the carpus obtuse; and, although 

 Herbst's figure is too broad, we deem it probable that it is his species; 

 and, in either case, it may well receive his name, as applied by 

 Guerin. 



Cancer cymodoce? Herbst, op. cit, pi. 51, f. 5. 



Trapezia cymodoce, Guerin, Voy. de la Coquille, pi. 1, f. 4. 



Trapezia miniata, Hombron and Jacquenot, Voy. au Pole Sud, pi. 4, f. 10-13. 



Trapezia dentata (M'Leay), Dana, 



Frons sat sinuosus, dentibus sex promiimlis. Dens orbiiae inferior aeuttis. 

 Dens carapacis lateralis acufiis. B<h * antlet mdmjvi, (/ramies, mar- 

 gine articidi tertii intemo acute serrato, deute aciilo apioali etirvato. 

 Pedes octo postici sparsim pithescentes mediocres, jxudo graciles, 



Front rather strongly sinuous, inferior tooth of orbit, acute. Lateral 

 tooth of carapax acute. Anterior feet subequal. large; inner mar- 

 gin of third joint acutely serrate, and apical tooth curved. Poste- 

 rior feet sparsely pubescent, moderately stout, rather slender. 



Plate 15, fig. 6a, animal, from Tahiti, enlarged; />, abdomen of 

 female; c, outline of front of specimen, from Tongatabu; (/, outline 

 of arm and carpus, ibid. 



From the coral reefs of Tahiti; the Feejees; and Tongatabu. 



Length, 0-30 inch; breadth, 036 inch; ratio 5:6. Colour, dark 

 ochreous, also brownish, also deep vermilion, also dull purplish 

 blue. Tooth on the front, near the orbital cavity, an acute spine. 



