GAMMARLD.f:. J 71 



having ii long slenck'r styliform dactylos ; three posterior pairs of 

 pcreiopoda having the biusos well expanded. " Three posterior 

 ]mirs of pleopoda very spiny above, those of the last pair short." 



" Female. — Superior antenna} longer than the inferior ones. Cei)ha- 

 lon e(nialling in length that of the first two segments together, 

 which equal eaeh other. Coxae of the first pair of gnathoj)oda 

 very small, subtriangidar ; those of the second pair without a 

 groove, and not projecting beyond the others, though still the larger. 

 This results from the smaller size of the first pair of gnathopoda, 

 which are much more slender, and those of the second pair pro- 

 portionally more elongated, than in the male. 



'* The colour is dark greyish on all the segTnents, coxa;, and 

 basa, except at their margins. Antennfe and legs white. 



'' Length of a large male 0-G4 inch. 



*'Hab. This species is abundant on the whole coast of Xew England, 

 as well as Grand ilanan. It is most abundant on sandy bottoms in 

 the laminarian zone ; although sometimes occuri-ing at low-water 

 mark, as at Fisher's Cove ; or in the coralline zone, as in twenty-five 

 fathoms, off Buck Island." — Stim_pson. 



I am indebted to the discoverer of this species for a specimen, 

 from which T have drawn the above description of the male, and the 

 figiu'e in the plate ; the deficiency I have filled up from the author's 

 original description of the female in the work referred to. 



6. Protomedeia Nordmannii. 



Acanthonotiis Nordmannii, EcUcards, Hist, dcs Crust, iii. p. 24. 



" Cephalon not rostrated, but forming, above the base of the inferior 

 antenna?, a large protuberance which bears the eyes, and which 

 carries at its extremity the superior antennae. Antennae slender 

 and long ; the peduncle of the superior pair very short and the fla- 

 gellum long, exceeding in length but a little the peduncle of the 

 inferior pair. Pereion and pleon roiuid, without teeth or spines 

 below. Coxae of the gnathopoda and first two pairs of pereiopoda 

 extremely large. First pair of g-nathopoda subchelate, having the 

 propodos enlarged below near its base ; dactylos tolerably long. 

 Second pair of gnathopoda fiUform, and without trace of a prc- 

 hen.silc termination. First and second pairs of pereiopoda luning 

 the meros veiy large and broad, the caqnis and propodos veiy 

 small, and the dactylos very long, slender and styliform ; three 

 posterior pairs short, but having the basos very large and nearly 

 as broad as long. Posterior pair of pleopoda much longer than 

 those of the two preceding pairs, terminating in two huueolatc 



