gg CRUSTACEA. 



Inner edges of fingers of female denticulate throughout. 



The genus Pisoides resembles Hyas in the flattened form of the 

 moveable basal joints of outer antennas, but the first basal joint is large 

 quadrate and the epistome is very narrow. 



Hi/as Edwarchii, BELL, Trans. Zool. Soc. London, ii. 49, 1835, pi. 9, fig. 5. 



Pisoides tuberculosus, M. EDWARDS, Crust. D'Orbigny's Voy. S. A., p. 11, pi. 5, fig. 1. 

 This figure represents the animal without its villous coat, and hence differs from that by 

 Bell. 



SUBFAMILY LIBININ^E. 

 GENUS LIBIDOCLEA, Edwards and Lucas. 



The genus Libidoclea was instituted by Milne Edwards and Lucas, 

 in D'Orbigny's South America, Crustaces, p. 6. It has the general form, 

 short beak and long legs of Doclea, but the inner angle of the orbit is 

 prominent as in Libinia, which genus is similar also in form, though 

 with much shorter legs. In the species described by Milne Edwards, 

 the anterior margin of the third joint of the exterior maxillipeds is 

 strongly notched, and this he lays down as a generic character. It 

 fails, however, in our species, and cannot, therefore, be of this impor- 

 tance. The basal immoveable joint of the outer antennae has a strong 

 tooth on the outer side in both his species and ours; and in other 

 characters of generic importance, the two appear to agree. 



LIBIDOCLEA COCCINEA. ' 



Coccinea. Carapax orbiculato-triangulafu-s, sparsim tuberculato-spinosus 

 et paulo subtiliter granulosus, rostro fiat brevi. Pedes subtilis-nm& gra- 

 nulosi, tenues, digito paris \mi subidato et basin nan tumido, articulo 

 paris 2di Btio valde breviore quam carapax, tarsoque parce breviore 

 quam articulus quintus, articulo 4to pedum 8 posticorum supra com- 

 planato et Icevi. Articulus maxillipedis externi 3tius antice integer. 



Scarlet. Carapax round triangular, sparsely tuberculato-spinous, and 

 minutely sparse-granulous, beak shorter than in the L. granaria, 

 feet finely granulous, slender ; finger of first pair subulate, not tumid 



