HORX EXPEDITION—CRUSTACEA. 
241 
INIandibles seen from the side pyriform, with the pointed end uj^permost, 
covered witli liglit brown chitin, which at the inner lower end bears one or more 
blunt tooth-like processes, those of opposite sides biting one against the other ; 
maxilhe ribbon-shaped. 
Legs thirty-two pairs in number, increasing in size from before backwards to 
about the fifth pair. At about the sixteenth pair they begin to gradually diminish, 
till at the posterior end of the body they are extremely small. In the female the 
proximal lobe of the exopodite of the ninth and tenth pairs is extended into a 
thread-like appendage, to which the egg-masses are attached. In the male the 
first and second pairs of legs are modified to form grasping organs. The fourth 
and fifth endites form the pincer-like organ, the fourth being shortly rounded and 
bearing-numerous .short, stiff setai at its distal end. The fifth forms a curved claw 
mov'able upon the fourth, and bearing a short, stiff process at its distal end. The 
fourth bears on its inner face a small lobe, which is setose at its extremity. Inside 
the fifth is a longer lobe, also setose at its extremity. This lobe is much longer 
in the first than in the second leg. The remaining appendages, except the ninth 
and tenth, are similar to those of the female. 
The telson is equal in length to about the seven preceding abdominal seg¬ 
ments. The spinous plate processes of the dorsal edge of the telson bear each 
about fifty spines, which increase in length posteriorly to the terminal spine. At 
about a quarter of the length from the anterior end a pair of long caudal seta? are 
given off, which are divided at about half their length by a transverse joint, the 
distal half being plumose. The caudal appendages are long and slender, and are 
clothed at their inner proximal end by a large number of plumose setie, the distal 
dorsal edge being finely-toothed. 
Localities .—Alice Springs and counti-y between Oodnadatta and Charlotte 
Waters, in muddy water of clay-pans and flooded creeks. None were found in 
the same water on the I’eturn journey, when the floods had subsided and the water 
was clear. We are indebted to Mr. P. Squire for the first carapaces secured. 
Six spirit specimens were obtained, three male and three female, together 
with over one hundred dried carapaces. 
(7) Lijnnadopsis tatei, sp. nov. (Figs. 20, 21, 22, 23, 24, 25, 26, 27.) 
Carapace oblong rounded, much compressed. Dorsal margin variable, gene¬ 
rally straight, but at times slightly convexly curved, much as in Z. squirei 
UH 
