EXPLANATION OF PLATE LVII.b.* 



Gitanogeiton sarsi, gen. et sp. nov. 



n.s. — Line indicating length of specimen from which the illustra- 

 tions were drawn, 



a.s., a.i. — First antenna and peduncle of second. 



i.s., Li., m.m. — Upper and lower lips and mandibles, with higher 

 magnification of parts of the cutting plates and spine-row 

 on left mandible. 



mx.l, mx.2, mxp. — First maxillse, one of the second maxillae, 



and the maxillipeds. 

 n.l, gn.2. — First and second gnathopods. 



prp.l, S, 3. — Parts of first, second, and third peraeopods. 



The mouth-organs are magnified on a higher scale than the 



other details. 



