74 B. IV. Ktuikel, 



provided with prehensile spine. In second gnathopods, wrist shorter 

 than in first and hand more nearly oval with palm qnite obhque 

 and posterior margin much shorter than palm and provided with 

 several groups of spines, palm with numerous submarginal spines 

 of various lengths and 2 prehensile spines ; finger moderately stout, 

 provided with 2 short cilia on inner concave margin. 



Other characters as in H. poniica. 



The species was represented by several individuals 6—8 mm. in 

 length. 



Parhyalella gen. nov. 



First antennae longer than peduncle of second ; first maxillae with 

 palp wanting ; maxillipeds with 4-jointed palp, last joint being ungui- 

 form ; gnathopods subchelate ; telson entire. 



This genus is closel}^ related to H3'alella but differs from it in the 

 alisence of a maxillary palp. 



Parhyalella batesoni sp. nov. 



Eyes moderately large, compound, situated well toward dorsal 

 side of head. 



First antennae nearly as long as second ; peduncle longer than 

 flagellum which is composed of about a dozen rather short segments 

 which are markedly broader at the distal than at proximal end ; 

 first joint of peduncle very stout, scarcely longer than broad, second 

 joint subequal in length but much narrower, third joint shorter than 

 second and about twice as long as broad. Second antennae with 

 first and second joints of peduncle short and coalesced with head, 

 gland cone absent, third joint about as broad as long, fourth joint 

 rather more than twice as long as broad, fifth joint somewhat longer 

 and more slender than fourth ; flagellum very short, scarcely longer 

 than last joint of peduncle, m.ade up of onl}' a few segments which 

 rapidly become shorter and thinner distally. 



Mandibles with principal cutting edge divided into 6 teeth of 

 which the second and third from the anterior end are largest, sec- 

 ondary edge divided into 5 nearly equal teeth, molar tubercle ver}' 

 strong, palp wanting. First maxillae with palp wanting, outer plate 

 rather large with pectinate and branched spine-teeth on distal end ; 

 inner plate rather short and slender with 2 plumose spines on apex. 

 Second maxillae with outer and inner plates rather narrow and sub- 

 equal, outer one with setae on distal margin, inner one with setae 

 also on distal half of inner margin. Maxillipeds with inner and outer 

 plates rather small, outer plates extending as far as apex of first 



