M)G 



^Ir. L. A. Boriadailc — yotea <>« Curithf. 



are j^reatly broadoncil ; (G) the telson with two pairs of spiues 

 at tlie sides, and at the end an outer short an<i an inner longer 

 pair of spine?, a subinedian pair of slender feathered spines, 

 and ft median jiointed projoetion ; (7) a gill-fornuila com- 

 prising pleurobranehs tor the legs, an arthrobrancli for the 

 third niaxilliped, and in Ili/vienocera the vestige of a pleuro- 

 branch for the latter limb, with epipodites on the inaxdlipeds 

 only. 



II. 'J'llK PALiEMONID^. 



There ninst be recognized in this family four subfamilies, 

 separated as lullows : — 



I. None of the bristles at the end of the larval telson 



become in the adult transposed on to the anterior 

 part of that oviran, -wliich is therefore unarmed 

 on back and sides. The surface of the molar 

 process of the mandible is closely ridpred. [Thei'e 

 IS a pleurobrancli for the third maxilliped.J .... DesmocaridincB. 



II. Two pairs of the bristles at the end of the larval 



telson become in the adult transposed on to the 

 back of that organ. The surface of the molar 

 process of the mandible bears some half-dozen large 

 knobs or crests. 



A. The end of the telson bears six spines. [There is 



no pleurobrancli to tiie third maxilliped.J .... Pontoniina. 



B. The end of the telson bears four spines. 



1. The side of the carapace is traversed by a 



suture. The outer flagellum of the antennule 

 is but slightly cleft. Tiiere is no pleuro- 

 branch to the third maxilliped Tyjihlocaridinte. 



2. The side of the carapace has no suture. The 



outer flagellum of the antennule is deeply 

 cleft. There is a pleurobranch to the third 

 maxilliped Palcemonina;. 



III. Definitions of New Genera. 



1. Lysmatella (Hippolytidse). 



Related to Lysmaia, but without inastigobranchs on the 

 legs. 



2. Phyllognathia (Gnathophyllidge). 



Iscliium of third maxilliped narrow and movably sutured 

 to nierus. Mandible subcylindrical. Laciniae of maxilla? 

 lost. Outer flagellum of antennule iiormal. Ho.strum of a 

 good length. 



