AUSIBAIiIAN MAIACQaiBACA. 23& 



421. Lysianassa Kroyeri. 



UphippipJiora Kroyeri, White, Ann. and Mag. Nat. Hist. (2), 

 , Vol. i., p. 226 (1848), and Zool. " Erebus and Terror," pi. v. 



Lysianassa Kroyeri, Sp. Bate, Cat. Amphip., p. 65, pi. x., fig. 4 ; 

 G. M. Thomson, Trans. N. Z. Inst, Vol. xi., p. 237 (1879). 



Animal not much compressed, smoothly arcuate ; a dorsal 

 spine in the fourth segment of the pleon. Byes reniform. 

 Superior antennas having the first joint of the peduncle reaching 

 scarcely beyond the ocular process of the cephalon, the second 

 and third joints very short ; the flagellum not longer than the 

 peduncle. Inferior antennas three times as long as the superior, 

 the peduncle not extending beyond the peduncle of the superior 

 pair. First pair of gnathopoda having the propodos nearly three 

 times as long as the carpus, and armed on the under side with a 

 strong curved spine near the base of the dactylos. Second pair 

 of gnathopoda having the propodos a little shorter than the 

 carpus, and both inferiorly covered with minute denticles ; the 

 propodos furnished upon the superior margin with tufts of long 

 hair ; serrated on both margins, palm short, inferior angle pro- 

 duced into a tubercle ; dactylos not so long as the palm. Coxas 

 of the second pair of pereiopoda having the lower half of the 

 posterior margin greatly produced. Posterior pair of pleopoda 

 having the rami much longer than the basal articulation. [$. _B.] 



Tasmania. Found also in New Zealand. 



Genus Gixceeina,* Haswell. 



Superior antennas slender, rather long, provided with an 

 appendage. Mandibles with a palp, the incisive edge not toothed ; 

 no accessory plate ; anterior margin with a prominent tubercle. 

 Maxillipedes with large squamif orm processes on the basal joints. 

 Four anterior pairs of coxse deeper than their respective segments ; 

 the fourth pair slightly produced inferiorly and posteriorly. 

 Gnathopoda filiform, slender ; anterior pair smaller than the 

 posterior, imperfectly subchelate ; posterior pair subchelate. 

 Posterior pleopoda biramous ; the rami broad-lanceolate. Telson 

 double. 



•Altered from Qtycerq. 



