GAMMAIUD.K. 57 



3. Montagua Alderii. (Platk VITI. fig. 6.) B.M. 



Montnyun Alderii, Spf/irc Bute, Brit. Assoc. Repwt, 1855; Synopsis 

 Brit. Amph., Ann. Nat. Ili.st. 1857. 

 niiite, Hist, of Brit. Crust, p. 166. 



Eyes round, red. Superior antennae not so long as the inferior. In- 

 ferior antcnnte hiwing the peduncle as long as the superior antenna?. 

 The fii-st pair of gnathopoda having the meros interiorly produced, 

 and the carpus not so, while both joints are armed upon the under 

 side with fasciculi of hairs, some simple and others tufted ; the 

 propodos having the pahn oblique and scarcely defined. Second 

 pair of gnathopoda haA-ing the ])ropodos short, a little longer than 

 broad ; the palm serrated near the base of the dactylos, and deeply 

 emarginate near the inferior angle, which is produced into a tooth. 



Length ^ths of an inch. 



In other respects it approximates to M. marina. The colour, when 

 alive , is straw striped ^vith rose. 



I have received this species from the coast of Northumberland, 

 where it was taken by Mr. Joshua Alder, in compliment to whom 

 I have named it. 



4. Montagua longimana, n. s. (Plate IX. fig. 1.) B.M. 



Superior antenna? shorter than the inferior. Propodos of the second 

 pair of gnathopoda four times as long as broad. Inferior margin 

 parallel with the superior ; palm short, oblique, and armed with a 

 tooth at the inferior angle. 



Length ^-th of an inch. 



Hab. Piedmont (Mr. J. Gwynn Jeffreys). 



5. Montagua pollexiana. (Plate IX. fig. 2.) B.M. 



Montagua pollexiaua, Spcncc Bate, Brit. Assoc. Report, 1857 ; Synopsis 

 Brit. Aniplt., Ann. Nat. Hist. Feb. 1857. 

 Wliite, Hist, of Brit, Cmst. p. 107. 



Superior antenna; longer than the inferior. The inferior antenna; 

 ha\ing the peduncle reacliing to the middle of the flageUum of 

 the superior. The maxillipeds ha^'ing the cai'pus, propodos, and 

 dactylos of equal length, and longer than the preceding joints. 

 The first pair of gnathopoda having the mei'os infeiiorly produced, 

 and fringed with hairs ; the carpus longer than the jjropodos, 

 and fringed with hairs, but not inferiorly i)roduced ; tlie pro- 

 podos three times a.s long as broad ; palm short, straight, oblique. 

 The second pair of gnathopoda hav'ing the carpus shorter than the 

 propodos ; the propodos a.s long again as broad ; palm advanced, 

 deeply notched just inside tlie infcrioi- angle, which is produced 



