315 



Gen. G. PontOCrateS, Boeck, 1870. 

 Syn. : Kroyera, Sp. Bate (part). 



Outward aspect about as in the genus Monoeulodes. Cephalon produced in 

 front to a short deilexed rostrum. Coxal plates of middle size, 4tli and 5th 

 pairs rather large. Eyes contiguous placed above at the base of the rostrum. 

 Antennae in female nearly equal in length and rather stout, last peduncular 

 joint of the superior ones af usual appearance; inferior antennae in male 

 elongated and slender. Anterior lip rather broad, nearly quadrate; posterior 

 lip with the inner lobes very small. Mandibles moderately strong, molar ex- 

 pansion of the usual structure, though not very large, palp well developed. 

 Maxillae comparatively shorter and stouter than in Monoeulodes, otherwise 

 of much the same structure. Maxillipeds with the masticatory lobes not very 

 large, scarcely reaching beyond the middle of the antepenultimate joint of 

 the palp, the latter rather large. Gnathopoda very unequal in structure, 

 the anterior ones rather stout, with the propodos large and subcheliform, 

 carpus extremely short, but produced at the end inferiorly to an elongated 

 setous lobe. Posterior gnathopoda much more slender than the anterior, 

 propodos sublinear in form and having the infero-anterior corner produced so 

 as to form with the dactylus a complete chela, carpus very short and pro- 

 duced along the inferior side of the propodos in the form of a narrow spur- 

 like process, the outer part of which projects beyond the chela. The 4 an- 

 terior pairs of pereiopoda rather stout and densely setous; last pair of the 

 usual slender and elongated form. Uropoda and telson about as in Monoeulodes. 

 Remarks. This genus was established by Sp. Bate as early as in 

 1857, but, as his generic name Kroyera had been appropriated in Zoology, 

 that subsequently proposed by Boeck must be retained for the genus. It is 

 very markedly distinguished from those treated of in the preceding pages by 

 the peculiar structure of the posterior gnathopoda, the propodos of which 

 forms a complete chela. Otherwise it comes rather near to the 2 preceding 

 genera. In the restriction here adopted, it comprises as yet only 2 species, 

 one of which will be described in the sequel, the other being the Kroi/vrn 

 inritaria of Sp. Bate. 



19. Pontocrates norvegicus, Boeck. 



(PI. Ill, fig. 2). 



Fonloc rates norvec/icus, Boeck, Crust, amph. bor. & arctioa, p. 91. 

 Syn. : Kroyera altamariua, Sp. Bate. 



Body rather stout, and tumid in its anterior part, with broadly-rounded 

 back. Cephalon about the length of the first 2 segments af mesosome com- 



