REPORT ON THE AMrHIPODA. 1009 



1882. Moera spinosa, Haswell, Catal. Australian Crust., p. 257. 



1883. „ „ Chilton, Trans. New Zeal. Inst., vol. xv. p. 81. 



1884. „ festiva, Chilton, Proe. Linn. Soc. N.S.W., vol. ix. part iv. p. 3 (extract), pi. xlvi. 



fig. 2, a. b. c. 

 18S5. „ rubro-macidata, Husvvell, Proc. Linn. Soc. NSAV., vol. x. part i. p. 11 (extract), 



pi. xv. figs. 5-12. 



Rostrum minute, lateral lobes of the head not very prominent, nasiform, the lateral 

 margin below the lobe sigmoid ; the first five segments of the pleon prettily serrate across 

 the back, with setules in the serrations, in one of the specimens with fifteen teeth on the 

 first segment, seventeen on the second, fifteen on the third, nine on the fourth, seven on 

 the fifth, the central tooth being the most prominent, especially in the third and fourth 

 segments ; the posterolateral angles of the first three segments sharply pointed, with a 

 little serration of the lower margin in the first and second segments, and sometimes in 

 the third, which also has the lower part of the hind margin serrate ; the sixth pleon- 

 segmeut with a dorsal tooth over the base of the telson, and a tooth further on and lower 

 down on each side of the telson, which may be regarded either as dorsal or lateral, the 

 segment also sharply pointed below. The ornamentation in this species seems liable to 

 considerable variation. 



Eyes oval, situated close to the margin of the lateral lobes. 



Upper Antenna; with the peduncles a little, and the flagella much, longer than those 

 of the lower antennae ; the first joint long, carrying some cilia and setse, and armed along 

 the serrate under side with four or five stout spines ; the second joint more slender than 

 the first but of ecpial length, or sometimes a little longer, with many groups of setse, and 

 on the under side several spines ; the third joint scarcely more than a fifth of the length 

 of the second, carrying some groups of setse ; the flagellum having in three different 

 specimens respectively twelve, twenty-eight, and thirty-three joints, but the specimen 

 with twenty-eight joints had on one antenna only sixteen, that with twelve had on one 

 antenna only ten ; in every case the first joint of the flagellum was much the largest, 

 subequal to the third joint of the peduncle, while the last joint was in each case minute ; 

 the secondary flagellum varied similarly, having but four joints in the small specimen to 

 accompany the primary of twelve, eight in the large specimen for the primary of sixteen, 

 twelve for the primary of twenty-eight, in the third specimen, also large, ten for the 

 primary of twenty-three, but on the other antenna eleven for a primary of twenty ; the 

 joints had apical groups of setules in both primary and secondary flagella, in the former 

 also one or two short cylinders. 



Lower Antenna;. — The lobe of the first joint not much expanded, the second joint 

 short except for the very long decurrent gland-cone, which nearly reaches the distal end 

 of the long third joint ; the third joint carries some groups of setules ; the fourth joint 

 thinner than the third, but between two and three times as long ; the fifth joint both 

 shorter and thinner than the fourth, both carrying many groups of setse ; the flagelJum 



(ZOOL. CHALL. EXP. — PART LXYII. — 1887.) ^ xx I- 1 



