102-4 ON THE PYCN060NIDA OF THE AUSTRALIAN COAST, 



and less dilated ; it has seventeen denticulated spines on the last 

 joint of the third pair of appendages, fifteen on the ninth joint, 

 about fifteen on the eighth, and eighteen on the seventh. 



Nympiion validum, n. sp. [PI. LIV., figs., 6 — 9.] 



The length of the body is about six times its breadth ; the 

 latei'al processes are separated by distinct intervals ; they are well 

 developed, being rather longer than the breadth of the body ; the 

 neck is rather short and stout. [The proboscis and the abdomen 

 arc both lost.] The first pair of appendages are rather short, the 

 first joint short and thick ; the second ovid and swollen, produced 

 into a long, rather slender, finger. The second pair of appendages 

 are very short, much shorter than the first, the third joint the 

 longest. The third pair of appendages are well dt veloped ; the first 

 three joints are short and thick, the fourth longer, slightly curved, 

 the fifth considerably longer than the third, provided at its 

 extremity with a remarkable process ; the sixth to the tenth joints 

 are nearly equal, the ninth and tenth being the smallest ; the last 

 four joints are armed with denticulated spines of which there are 

 five on the seventh, six on the eighth, four on the ninth and five 

 on the tenth ; there is no terminal claw. The last four pairs of 

 appendages are of nearly equal length, more than twice the length 

 of the body, stout, and ornamented with a few conical tubercles 

 each capped with a small, simple spine ; the first joint is short and 

 thick, the second more than twice as long, narrow proximally, very 

 stout distally ; the third is shorter and has one or two low tubercles; 

 the fourth is more than twice as long as the second and has two 

 prominent conical tubercles at its distal end; the fifth is rather 

 shorter than the fourth and has two prominent tubercles in its 

 proximal half ; the sixth is a good deal longer than the fourth and 

 lias two obscure tubercles in its proximal half and a pair at its 

 distal end ; the seventh segment is very small and is armed with a 

 few stout spines ; the eighth is strongly bent, it palmar border is 

 deeply concave, and armed with a row of spines of which the 

 proximal five are much shorter than the rest ; the large claw is 



