AMPHIPODA. CHIL.TON. 



75 



few spinules; the rest of the appendage is closely similar 

 to that of E. su'bcarintus and shows the same characteristic- 

 arrangement of setae on the inner surface. The second 

 gnathopod (Fig. 10 &) is much larger than the first, but 

 the propod is only moderately expanded, being narrow 

 pyriform, the greatest width l)eing at about one-third of the 

 length from the base ; the palm is long and ill-defined, and 

 bears a few irregular teeth towards the base of the dactyl; 

 the whole length of the palm and the posterior half of the 

 inner surface is thickly covered with fine long hairs mostly 

 arranged in short transverse rows; there are live or six 

 small tut'ts of spinules along the anterior margin; the 

 dactyl is more than one-third the length of the propod and 

 has the inner concave margin with a few irregularities near 

 the middle. 



The fifth peraeo- 

 pod (Fig. 10 c d) 

 is broad, especially 

 in the meral joint -. 

 the posterior 

 margin of the basal 

 joint is moderately 

 convex and simply 

 serrate on the 

 proximal portion, 

 while on the distal 

 portion the serra- 

 tions are much 

 closer and deeper, 

 forming a regular 

 pectinate margin, 

 similar to that in 

 E. neglectus, Ohil- 

 ton, and E. serrula. 

 Walker. 



d c 



Fig. 10 c d. Elasmopus diemenensis (Haswell), 

 male. 



In the telson 

 each half has the 

 lateral margins 

 produced into long 

 acute teeth so that 



the posterior margin is deeply concave; from it arises two 



stout spinules. (See Fig. 10 e.) 



Fifth paraeopod. d. Basal joint of same, 

 more highly magnified. 



In the structure of the second gnathopods and of the 

 peraeopoda, this species appears to approach E. serriila, 



