

GAMMARIDEA. 973 



Female :— Epimerals rather large. Head with each side in front pro- 

 duced into a prominence containing the eyes. Antennse with 

 rather long setae arranged along the lower side ; the superior not 

 half as long as body, first joint of base not longer than third, fla- 

 gellum nearly as long as the base, appendage three-jointed; inferior 

 pair shorter, four basal joints subequal (the last longest, and the 

 first shortest), flagellum shorter than base. Four anterior feet 

 small; fourth stouter than third; three posterior pairs gradually 

 increasing in length, setae short, few. 



Plate 67, fig. 2, animal, enlarged. 



From the Island Enchados, Bay of Kio Janeiro, Brazil; found 

 among the Serpulas of the shores. 



Length, three to four lines. Colour, transverse bands of yellow and 

 black or brownish black. The projection containing the eyes is two- 

 thirds as long as the first basal joint of the superior antennae. The 

 first basal joint of the inferior antennae has the lower apex prolonged 

 and acute, the process being nearly as long as second joint. The second 

 pair of stylets extends a little farther back than the first or third, 

 branches of first pair a little shorter than base. The first joint of the 

 legs of the fifth and sixth pairs is very broad, and nearly circular in 

 form ; that in the seventh pair is narrower. The tarsi are all short. 

 The specimen appeared to contain eggs along the venter. 



Gammarus hirsuticornis, Dana, Proc. Amer. Acad. Sci. Boston, ii. 210. 



Genus PYCTILUS, Dana. 



Epimerce sat breves. Pedes Imi 2dique jprehensiles, reliqui non preTien- 



siles, secundarum digito 2-articulato, manu 1-articulatd. Antennae 



elongatm, secundos subtus primas affixw. Styli caudales postici ac in 

 Dercothoe. 



Epimerals of moderate size. First and second pairs of feet prehensile, 

 the rest not prehensile, finger of second pair two-jointed, hand one- 

 jointed. Antennae elongate ; second pair inserted below the first. 

 Caudal stylets as in Dercothoe. 



244 



