64 NOTES ON TASMANIAN CRUSTACEA ETC. 



The maxillipeds (fig. 15) have the basal plate elongated^, 

 notched at the apex, and finely setose on the margin; the 

 outer plate is large, rounded, and has the margin perfectly 

 entire, except below the middle of the inner side, where it bears 

 two or three minute spines ; the palp reaches a little beyond 

 the outer plates, and has the joints finely setose. 



The^rs^ gnatJiopoda (fig. 16) are simple and pediform ; the 

 side plates are large, and are produced anteriorly ; the bases is- 

 straight ; the ischium short, and the meros is sub-equal to it 

 in length, and is produced on the lower setose margin into a 

 conical projection ; the carpus is rather longer, convex above, 

 "witb tufts of setae at the upper and lower extremities ; propodos 

 longer than carpus, tapering to the end, and with tufts of 

 setsB on the lower margin ; dactylos slightly curved, simple. 



The second gnathojpoda (figs. 17 and 18) are long and slender ; 

 the basos is long and narrow ; the ischium about half as long, 

 articulated almo"st at right angles to it, and with one terminal 

 seta ; the meros again is jointed almost at right angles to the 

 ischium (so that the rest of the limb — in the dead specimens — is 

 nearly parallel to the basos), and bears one long seta and a 

 fringe of very minute hairs on its lower margin ; the carpus is 

 about as long as the ischium, is fringed with minute hairs on 

 both surfaces, and bears two or three long setae at the extremity 

 of its upper and lower margins; the propodos is oval, broader 

 than the carpus, but little more than half as long ; it is fringed 

 ■with very minute hairs on its lower margin, and on the upper 

 half of its upper margin bears a number of long set» ; the 

 dactylos is curved, and so small at to be almost undistinguishable 

 even when magnified 150 diameters. 



The first 2^€reio]joda (PI. v., fig. 9) have the side-plate nearly 

 rectangular in form, and twice as deep as it is broad. In the 

 second (PI. v., fig. 10) the side-plate is the same depth, but the 

 lower half is produced backwards as a rounded lobe, at right 

 angles to, and twice as broad as, the upper half. The limb of 

 the first pair is rather longer and more slender than that of 

 the second ; both are furnished with a few slender set^e on the 

 lower side of the ischium, meros, and carpus. The third ;pereio- 

 jpoda are somewhat shorter than the two anterior pairs ; the 

 side-plates are only about half as deep as those of the second 

 pair, but are considerably broader than deep ; the basos is 

 posteriorly produced into a large rounded plate, while the 

 meros is also produced into a broadened flange, which extends 

 downwards at its apex, and ends in a seta ; the front margin of 

 the basal joints is lurnished with simple setae. In the fourth 

 and fifth pairs the side-plates are successively smaller, and the 

 plates on the basos larger than in the third ; the margins also 

 have short spines instead of setee ; the dactylos of the last pair 

 is slender and nearly straight ; in all the anterior pairs it is 



