CRUSTACEA. 299 



from Port Molle, obtained on tho beach (No. 92), at 5-15 fms. 

 (No. 1 IS), and 14 i'ms. | No. 93). Some of tbese (No. 95) arc adult 

 males of large size. Also a small female from Port Denison, 

 4 fms. (No. 111). All of the above are from Dr. Coppinger's first 

 collection. Also a small male from Clairmont Island (No. 151), 

 and two specimens from Thursday Island — a female from tbe beach 

 (Xo. 107) and a male from a depth of 4-5 fms. (No. 105) — in the 

 second collection. 



ISOPODA. 



1. Ligia gaudichaudii, var. australiensis, Dana? 



Here are somewhat doubtfully referred several specimens obtained 

 on the beach above high-water mark at Port Molle. Dana's 

 brief diagnosis was based on imperfect specimens in which both the 

 antennas and uropoda are wanting; and as Mr. Haswell had seen 

 no specimens of this species, and therefore adds nothing to our 

 knowledge about it in his Catalogue, the following description may 

 be useful : — 



The body is oblong-oval, moderately convex, but little laterally 

 dilated. The head is transverse, with its anterior margin convexly 

 rounded, without any median rostriform point, its upper surface 

 granulated and transversely sulcated, one of the sulci running 

 parallel to the posterior margin, and others bordering the posterior 

 margin of the eyes. The segments of the thorax are rather in- 

 distinctly granulated above ; the postero-lateral angles of the first 

 segment are nearly right angles, those of the second and third 

 slightly more acute, those of the fourth to seventh segments acute and 

 posteriorly prolonged, yet not to so great a degree as in some species 

 of the genus. The segments of the postabdomen are nearly smooth 

 above in the middle line, but granulated on the sides, and have as 

 usual the postero-lateral angles acute and produced ; the postero- 

 lateral angles of the penultimate segment scarcely reach more than 

 halfway to the apex of the corresponding angle of the terminal 

 segment. The terminal segment is longer than the preceding ; 

 the posterior margin has a very slight median prominence, and a 

 rather deep notch close to the postero-lateral spine ; the margin 

 of the notch, although sometimes slightly sinuated, is not dentated 

 as in L. gaudichaudii; the postero-lateral spine is short and scarcely 

 reaches beyond the level of the posterior margin. The eyes are 

 very large, black. The minute antennules are not visible in a dorsal 

 view. The antennas are shorter than the animal, and have the 

 penultimate and terminal joints of the antennas slender and elon- 

 gated, the terminal longer than the preceding joint ; the three pre- 

 ceding joints are robust and much shorter ; the flagellum composed 

 of 26-30 joints ; the joints of the legs are clothed with short stiff 

 setce, which are most abundant on the inferior margins of the four 

 last joints ; below the terminal claw is a second small subterminal 

 one on all the legs. The terminal joint of the stem of the uropoda 



