DREDGING ON THE COASTS OF NORTHUMBERLAND AND DURHAJI. 191 



like processes ; dactylos strong, much, curved, rather more than half the length 

 of the palm, and having the inner margin simple. The basis of the last 

 three pereiopods is about twice as long as broad, the anterior margin fm-nished 

 with strong (spine-like) hairs, the posterior with very minute and slender 

 hairs set in little notches. Posterior pereiopods very long, and having the 

 propodos greatly developed and flat. The fii'st pair of tu'opods extend con- 

 siderably beyond the second ; th.e last pair were mutilated. Telson so deeply 

 and widely excavated in the centre as to appear double until closely examined, 

 each portion ha\'ing an obliqiiely truncate extremity terminating in spines. 

 Lateral margins of 2nd and 3rd segments of pleon fringed with hairs, and 

 produced posteriorly into a spine-like point. Fourth segment of ploon dorsally 

 produced into two or three spines. Fifth segment having two dorsal spines 

 on either side of the central fine. Coxee of all the legs shallow. 



Genus Uneiola, Say. 



Superior antennse with a minute secondary appendage; filaments of both pairs 

 of antenna} multiarticiilate. First gnathopods subchelate ; second not sub- 

 chelate. Telson squamiform, simple. Last uropods double-branched, very 

 minute, scarcely longer than peduncle of the preceding pair, tipped with small 

 spines. First two pairs of iiropods having their branches truncate at the end, 

 and furnished with strong spines. 



Uneiola planipes, Norman (n. sp.). 

 Superior antennce with first joint of peduncle not so long as the second, and 

 slightly longer than the third ; filament (17-jointed) equal in length to the 

 peduncle ; secondary appendage very minute, consisting of a single joint only, 

 and not longer than the first joint of the filament. Inferior anlennee with the 

 peduncle equal in length to that of the sui^erior, but the filament only half 

 the length. First joint of peduncle much shorter than the second, which is 

 of the same length as the third. Ifead rostrated. First (jnatliopoJs subchelate, 

 beset on each margin with tufts of simple haii's ; propodos slightly longer 

 than the carpus (which has the distal angle rounded, and of equal width with 

 the articulating propodos), somewhat ovate, and having the palm very oblique 

 and undefined ; dactylos simple, gently curved. Second gnathopods not sub- 

 chelate; carpus and propodos much flattened, and fringed with thick-set hairs; 

 dactylos small, springing from the inferior half of the tnincated apex of the 

 propodos, and immersed in a dense tuft of hair which springs from the upper 

 portion of the distal extremity and from the sides of the propodos. Dactyli 

 of the posterior pereiopods large and falciform, margined within with a row 

 simple spines. Body very slender, and coxae of all the legs very small ; 

 posterior lateral angles of first three abdominal segments produced into 

 conspicuous teeth. No trace of an eye. Posterior uropods very minute, 

 scarcely as long as the telson. 



Gythere latissima, Norman (n. sp.). 



Peach-stone-formed or shortly ovate, with a short central posterior pro- 

 jecting process ; greatest height subcentral ; length to breadth as one and a 

 half to one ; excessively tumid and gibbous. The ventral margins of the valves 

 are produced into a conspicuous keel, on either side of which the carapace is 

 extremely broad, the valves being projected directly outwards in the form of 

 a strong ridge which externally bends outwards and downwards so as to reach 

 below the level of the margin of the valves. The tumidity of the cai-apacc in 

 this part is excessive, and from thence the valves slope rapidly to the dorsal 



