Palaemon //-om near Sydney. 365 



long, are not sliarp, but rather obtuse. Twenty or tliirtj 

 of these spinules are seen just behind the liepatic spine, 

 some occur also on the latter and on tlie crest of the antennal 

 spine ; several spinules are, moreover, scattered on the upper 

 border of the carapace between the base of the rostrum and 

 the posterior margin ; the posterior branchial regions are, 

 however, quite smooth. It is, of course, impossible to say 

 whether these spinules are indeed always so sparse, or 

 whether in this specimen they are worn off. Similar spinules 

 occur close to the postero-inferior angles of the second to fifth 

 abdominal pleura, as also on the tergum of the sixth somite, 

 though they are here rather scanty, but the telson and the 

 endopodite of the caudal fan are thickly covered Avith them ; 

 they exist, finally, also on the basal joint and on the hardened 

 outer part of the exopodite. 



The telson no doubt usually ends in an acute point, but the 

 latter appears in our specimen, unfortunately, mutilated. 

 McCulloch wrote me that the acuteness of the telson, which 

 latter is sometimes almost rounded, is variable, and that the 

 latero-terminal spines are sometimes wanting: in my opinion 

 all such specimens are mutilated. In our specimen the 

 latero-terminal spines, of which the inner are much longer 

 than the outer, are well developed, as also the two pairs of 

 spinules on the ui)per surface of the telson. 



External maxillipedes reaching to the end of the penulti- 

 mate joint of the aijtennular peduncles. The legs of the 

 first pair are smooth and project with half their carpi beyond 

 the tip of the antennal scales ; the carpi (17 mm.) are about two 

 and a half times as long as the chelai {^'iy mm.), of which the 

 fingers are a little shorter than the palm. 



The legs of the second pair are equal, 1S7 mm. long, more 

 than once and a half as long as the body, and four times as 

 long as the carapace, rostrum included. The meri (fig, 2), 

 31 mm. long, project two thirds of their length beyond 

 the tip of the scaphocerites. The meri gradually thicken, 

 though at first very slowly, towards their distal extremity ; 

 looked at from above they appear to be 3 mm. thick at their 

 proximal extremity, 3*25 mm. in the middle, and 3*9 mm. at 

 the distal end, so that tiicy are just eight times as long as 

 thick at thtir distal extremity. The carpi (fig. 3), 58 mm. 

 long, are exactly as long as all the preceding joints taken 

 together and almost twice as long as the meri ; viewed from 

 above these very slender joints appear to be 2*75 mm. broad 

 at their ])roximal extremity, 3 mm. in the middle, and 4-2 mm. 

 at the distal end, so that the carpi are just Jourtten times 

 as long as broad at the distal i.v(remiti/. The carpi are 



