42 EEV. T. E. E. STEBBING ON AMPHIPODA FEOM 



Length, not including the antennae, in the slightly curved position of the sjiecimen 

 figured, two-fifths of an inch. 



Hab. Tropical Atlantic. The label accompanying the specimen figured contained the 

 words " Eiisei 55. Stud. Sanil. ded. 1892." A second specimen, in less satisfactory 

 condition, was labelled " 22° N.B. 36° V.L. Hygom. Stud. Saml. ded. 1892." Copen- 

 hagen Museum. 



The specific name was given in MS. by Professor Lutken in compliment to Herr 

 Riise. 



Pam. undetermined. 



Sancho, n. g. 



liostral point small. Perseon depressed, very broad at the centre; fir.st segment 

 short, seventh unusually long. Pleon narrow, much of it flexed. Eyes on the top of 

 the head, separate. First antennae with principal flagellum longer than peduncle; 

 accessory flagellum small, one-jointed. Second antennse with last joint of peduncle 

 longer than the preceding joint. Upper lip not emarginate. Lower lip without inner 

 lobes. Mandibles Avith cutting-edge, accessory plate, and spine-row small, but molar 

 and three-jointed palp powerful. Pirst and second maxillae normal. Maxillipeds with 

 outer plates smaller than, and scarcely reaching beyond, the inner ; fourth joint of palp 

 small. Gnathopods subchelate, the first pair in both sexes feeble ; the second also feeble 

 in the female, but in the male very long with very bulky sixth joint. Pera^opods normal, 

 the fifth pair the longest. Second uropods with peduncle scarcely shorter and rami 

 much longer than those of the first, third with short peduncle but very long inner ramus; 

 in all three pairs the outer ramus is shorter than the inner. Telson short, triangular. 



The name is taken from a character famous in fiction. 



Sancho platynotus, n. sp. (Plate 9 A.) 



The second and third pleon-segments have the postero-lateral angles minutely 

 produced ; at the second segment the pleon is bent and the remainder closely adpressed 

 to the ventral surface of the trunk. 



Eyes round, separated by more than the diameter of either, composed of numerous 

 ocelli, of which those of the outer ring appear to be larger than the rest. Specimens 

 preserved in spirit have a light pinkish pigment. 



First antennce. Pirst joint stout, about once and a half as long as broad, second much 

 shorter and thinner, third about half the length of second ; flagellum in male of forty- 

 one joints, the first longer than the last of the peduncle, followed by many joints not 

 longer than In'oad, to which succeed several much longer than broad. 



Second antennce. The basal joints short, the last joint of the peduncle rather long, 

 longer and thinner than the penultimate, which has an apical tooth ; the flagellum in 

 the male similar in structure to that of the first antenna, but perhaps shorter ; thirty- 

 three joints in an example not quite perfect. 



Upper lip wath broad front, the margin little curved. 



