Crangon and Galathea. 87 



The group is represented in the Britannic area by five species, which 

 liave occurred in both Irish and Britisli seas. For their distribution see end 

 of Paper. 



CHARACTERS OF GENUS. 



GALATHEA. 



Anomoura ; anterior chelipeds strong, equal, didactjie ; fifth pair chelipeds 

 weak, didactyle, carried folded up ; second, third, and fourth pairs acumi- 

 nate. 



External maxillipeds elongate, subpediform. Carapace depressed, beaked. 



Abdomen depressed ; no spines on somites ; six anterior abdominal somites 

 appendiculate in male ; appendages of first somite wanting in female. 



Telson unappendiculate, submembranaceous. 



Antennae unappendiculate ; external long ; internal inserted beneath eye- 

 stalks ; peduncle elongate. 



Eyes large, with a hairy scale {?). 



Chelipedum: par primum cheliforme: paria 2dum, Stum, 4tumque simplicia: 

 par quintum debile, cheliforme. Maxillipedes extern! subpediformes. Carapax 

 depressus, rostratus. 



Abdomen depressus, superne inermis; somitum, anteriora paria primum 

 ad sextum in maribus appendiculata ; in foeminis paria secundum ad sextum 

 solum. 



Somite, ultimus submembranaceus, sine appendice. 



Antennae exappendiciUatce : par primum (internum) infra oculos insitum, 

 par secundum (externum) satis longum. Oculi magni. Species G. squamifera, 

 Andrewsii, dispersa, nexa, strigosa. 



1. Galathea squamifera (Fabricius). 



G. Rostro brevi, tuberculis squamosis, ciliatis superne velato, mediane sul- 



cato ; dente cylindrico terminante, raarginibus fortiter denticulatis ; chelipedum 



pare primo lato, denticulatis tuberculis conferto ; articulis, secundo, tertio, 



n2 



