OAMMAJtlli.T:. 131. 



Poreion smooth. Picon ha\-in?f each sop;nu'nt earinatcd, nnd, 

 except the tifth, doi-sally and posteriorly produced into a tooth. 

 Eyes ovate, not very large. Superior antenna; slender, ha\ing 

 the two joints of the peduncle subequal, the first carrying a strong 

 tooth upon the inferior distal extremity ; flagellum nearly as long 

 again as the peduncle. Infeiior antennae slender, shorter than 

 the superior ; peduncle scarcely longer than the peduncle of the 

 superior. Maxillipeds ha\-ing the squamiform plate of the ischium 

 reaching nearly to the extremity of the dactjdos. Gnatho- 

 poda feeble, subequal, small. First pair having the palm finely 

 pectinated with short obtuse teeth, and defined by a long, curved, 

 double-pointed spine ; dactylos curved, internally serrated. Se- 

 cond pair of gnathopoda ha\-ing the palm crenulated, and fringed 

 ^vith a scries of fine, short, equidistant spines of equal length, 

 and a second series of longer ones at greater intervals, defined by 

 a long spine ; dactylos serrated upon the inner margin. Three 

 posterior pairs of pereiopoda subequal, strong, ha\dng the dactylos 

 directed posteriorly. Three posterior pairs of pleopoda subequal ; 

 the antepenultimate rather the shortest. Telson very long, narrow, 

 divided for about two-thirds of its length; external margins 

 carrying each four fasciculi of hairs ; apex of each section ser- 

 rated, and armed with a solitaiy strong spine. Colour more or 

 less mottled with red. 

 Length nearly half an inch. 



Hah. Torcross, Devon (i)/o«;«(7i() ; Plymouth (C. aS. i?.) ; Penzance 

 {Mr. Han-is and Mr. Webster) ; Falmouth {Mr. Webster) ; Polpcrro 

 {Mr.Loufjhrin); Macduff (J//-. Gregor); ^\\e\\ixm\{Mr. Barlee) ; Bray, 

 Dublin (P/-o/. Kinahan); iW'Ua^it {Mr. H>/ii(li)uni nnd Mr. Thompson); 

 Bangor, co. Down, and Strangford Loch {Mr. Tliompson) ; C'uinl)rae, 

 Glasgow {Mr. llobertson) ; Etretat, Normandy {Mr. J. G. Jeffreys) ; 

 Brittany {M. Edwards) ; Piedmont {^^r. J. G. Jeffreys) ; Weymouth 

 {Gosse). 



2. Dexainine Blossevilliana, n. s. (Plate XXIV. fig. 2.) 



Cephalon produced into a narrow flat rostrum. Pereion with the 

 segments short. Picon with the segments long, and each, except 

 the sixth, dorsally carinatcd and posteriorly produced into a 

 strong tooth ; third segment armed with a strong tooth upon each 

 side near the centre of the posterior margin ; fourth and fifth 

 segments having a dorsal sinus. Eyes very large, quadrate. 

 AntennoD slender, subecpial, about two-thirds the length of the 

 animal : siqicrior i)air having tlie first joint of the peduncle armed 

 with a tooth at the interior distal extremity ; second joint longer 



