412 EEV. T. K E. STEBBING ON AMPHIPODA FEOM 



unnamed s|jecimens kiiully sent me by Professor Haswell, and whicU I refer to tliis 

 sj)ecies, measured about 11 mm. 



Hab. Shores of lllaM'arry, New South Wales {A. Gaimardii and A. australis Dana) ; 

 South Australia [A. Gaimardii, Bate) ; Tasmania {A. diemenensis Haswell) ; Jervis Bay, 

 Australia (the specimens above-mentioned, received from Professor Haswell). 



Allorchestes plumicoknis (Heller). (Plate 33 C.) 



1866. Nicea phimicornis Heller, Denkschrifteii der k. Akad. d. Wissenseli. luatli.-iiatiirw. CI. vol. xxvi. 



p. 5, pi. 1. figs. 8, 9. 

 1893. Byale Frevosiii Delia Vallc, F. u. Fl. Neapel, Mon. 20, Gammarini, p. .119. 



The body is compressed and the back smootli. The first side-plates widened below. 



JSi/es. Elongate rounded, lilack. 



First aiitennce. They reach along nearly half the flagellum of t!ie second pair. The 

 fii"st joint is longer tlian the second, the second than the third, which itself is not very 

 short: the tiagellura is much longer than the peduncle, of about eighteen successively 

 lengtlieniug joints. 



Second antennce. The flagellum is longer than tlie peduncle, of twenty-two joints ; the 

 terminal joints of the peduncle and first half of the flagellum are clothed ])eIow with 

 long fascicles of setae. 



First maxillce. The palp reaches the base of the spines of the outer plate. 



Ilaxillipeds. Tlie third joint of the palp is setose, the fourth long, acute. 



First giiathopods, d . The second joint rapidly widens from the narrow base ; the 

 fourth has a bluntly-produced apex ; the fifth forms a broad hind lobe, fringed along the 

 hind margin with graduated spines ; the sixth is oblong oval, rather longer than the fifth, 

 M'idening slightly to the straiglit, oblique, spinulose palm ; the finger thick, M'ith outer 

 margin abruptly curving to an acute apex. 



Second gnatliopods, 6 . The second joint is rather narrowly produced downward in 

 front; the fourth bluntly produced behind; the fifth very short, but wide, eml)racing 

 the base of the large oval sixth joint, which has a small groiip of spinules on the hind 

 margin ; the palm obliqixe, well defined by its angle and palmar sj)ines ; the finger strong, 

 acute, much curved. 



Ferceopods. The fifth pair is like the fourth, but rather longer ; the sixth joint slender, 

 straight ; the finger acute, little carved ; the setule of its inner margin prominent, as in 

 all tlie peraio^wds. 



TJropods. All the rami have marginal spines. In the third pair the peduncle is rather 

 shoi'ter than the telson, the ramus nearly as long as the peduncle. 



Telson. Cleft to the base ; the lobes below the middle narrow to rounded, well- 

 separated apices. As usual, the lobes in situ are inclined one towards the other. 



Length. 9-11 mm. 



Mab. Mediterranean, at Eagusa in the Adriatic, at Genoa, and at Villefranche. 



Male specimens from Villefranche have been kindly sent me by the well-known cur- 

 cinologist, M. Ed. Chevreux. According to Heller, only females were known to him ; 



