TERRESTRIAL TSOPOUA OF NEW ZEALAND, 107 



1. LiGIA NOV/E-ZEALANDI/E. (I'l. 11. fig. 1.) 



Lijgia novi-zealandi(B , Daua, U.S. Explor. Expcrl. xiv. Crust, part ii. p. 7o9, pi. xlix. fig. 2 (1853). 



Liyia nov(B-seal undue, Miers, Cat. Crust, of New. Zealand, p. 103 (187(5). 



Ligia quadrata (Hutton, MS. Cat. X. Z. Crust.), G. .M. Thomson, Tran.'*. N. Z. Inst. xi. ]). 23:2, pi. x .\, 



figs. 4& 4a (1879). 

 Ligia noKC-zeulandixc, Buckle-Lund, (^ni.stacea Isopoda Terrestria, p. 271 (188')). 

 Ligia quadrata, Budde-Lund, /. c. p. 271 (1885). 



Ligia novce-zealandice, Filliol, Mission do Tile Campbell, p. 415 (1885). 

 Ligia quadrata, Filliol, /. c. p. 415 (1885). 



Ligia neo-zelanica, Thomson & Chilton, Trans. N. Z. Inst, xviii. p. 157 (188U). 

 Ligia quadrata, Thomson & Chilton, /. c. p. 157 (1880). 



Specific description^. — Body elongate oval, about twice as long as broad, rather 

 convex; surface finely granular, sometimes with minute seta;, giving it a i)uuctate 

 appearance. Outer antennae slender, minutely setose, two-thirds the length of the body ; 

 fifth joint of peduncle as long as the third and fourth combined, flagellum fully twice as 

 long as the fifth joint with about twenty joints. Eyes large, subquadrate, distinctly 

 angled towards the middle line, facets very numerous and of small size. Vertex with a 

 transverse depression just posterior to the angle of the eyes, interrupted in the middle. 



Posterior bordei- of the first and second segments of the mesosome transverse, not 

 produced backwards at the lateral angles ; lateral angles of the remaining segments 

 progressively more and more produced backward, those of the seventh segment reaching 

 as far as the angle of the third segment of metasome. Side-plates (" epimera") large, 

 distinctly marked off from the middle jiart of the segment by a longitudinal sulcus in 

 the second, third, and fourth segments, the sulcus very iodistiuct in the remaining 

 segments. Legs sj)inose, gi^adually increasing in length posteriorly, the first and second 

 in the male having the carpus broadened, and the propodos and dactylus impinging 

 against it to form a subchelate hand, the first being broader than the second ; in the 

 female all the legs simple ; in each leg the dactyhts has a secondary slender nail about half 

 the length of the terminal nail; at the base of the terminal nail arises on the outer side 

 a long seta slightly clubbed at the end and reaching as far as the end of the terminal nail. 



Terminal segment of the metasome subquadrate, its lateral angles acute but not much 

 produced, posterior margin regularly convex in the middle. Uropods with the peduncle 

 subcylindrical, about half the length of metasome ; the two rami of nearly equal length, 

 the outer often rather the shorter and more slender, both tapering, minutely setose, and 

 with one or two apical setae. 



Colour : yellowish, closely speckled with black, givuig a greyish or slaty effect. 



Length about 12 mm., breadth about 5'5 mm. 



Habitat. — Very abundant on all the coasts of New Zealand, generally found under 

 stones or seaweed about high-water mark, but sometimes extending a little further 

 inland. It runs with great rapidity when disturbed. 



Remarks. — It is only after considerable hesitation that I have united Liyia qiuulrata, 

 Thomson, with Lijgia noci-zealandice, Dana. When Mr. Thomson described his species 

 he was acquainted with Dana's description, but found that it differed from his sjjecimens 



SECOND SEKIES. — ZOOLOGY, VOL. VIII. 17 



