REPORT ON THE ANOMURA. 25 



concavity on its antero-external border, and is wider than the Latter ; the cxognath is 

 very slender. 



The chelipedes are slender, and the terminal joints but little dilated, the merus is 

 armed with three spinules on its anterior border and two on the posterior (in each case 

 one of these overhangs the insertion of the carpus) ; the remaining joints are smooth. 

 The fingers are incurved, and their apices cross ; they possess a thin, entire, cutting edge. 

 The ambulatory limbs have the meral joints fringed with spinules on both the 

 anterior and posterior borders, but more numerous on the posterior, a few similar pro- 

 cesses are present on the carpi, and a few very minute horny spinules on both borders of 

 the propodus ; the distal end of this last joint gives rise posteriorly to three or four horny 

 spines articulated to a dilated portion of this segment ; the digits are but slightly curved. 

 The last pair of legs are subdorsal in position and of very small size, their total length not 

 equalling the meral joint of the preceding pair; the merus is armed with spinules 

 especially on its posterior border ; the carpus and propodus are subequal in length, the 

 former is somewhat flattened and dilated towards its distal end, and armed with spinules 

 on both sides ; the dactylus is very minute and opposed by a single spine on the posterior 

 border of the propodus. 



In the female the second and third abdominal segments are each provided with a 

 dorsal spine ; the fourth is glabrous and shield -shaped, its anterior border with a small 

 tubercular spine on each side, and halfway down the outer surface a rounded elevation 

 on either side ; there is also a median rounded elevation running from end to end ; the 

 telson is of small size, and its apex acute. Five pairs of appendages are present ; the 

 first pair of small size, uniramous, and united at their bases. The fourth, fifth, and 

 sixth abdominal segments in the male are devoid of spines. 



A male specimen gives the following measurements:- — Length of carapace 10 mm., of 

 chebpede 32 mm., of second leg 63 mm., of last leg 22 mm., of ocular peduncle 7 mm., 

 of supraorbital spine 4 mm. A female specimen is somewhat lai'ger. 



This species belongs to the section of the genus in which the last pair of legs do not 

 extend beyond the meral joint of the preceding pair. It difi"ers from Latreillia phalan- 

 gium, De Haan, in the absence of cardiac and buccal spines, and in the presence of only 

 two spines on the fourth abdominal segment of the female. 



Habitat. — Station 163a, ofi" Twofold Bay, Australia; depth, 150 fathoms; bottom, 

 green mud. Two adult specimens, male and female, the latter bearing ova, and the 

 remains of a third immature individual. 



Ofi" Port Jackson ; depth, 30 to 35 fathoms ; bottom, hard ground. Two young 

 examples, male and female. 



(ZOOL, CHALL. EXP. — PART LXIX. — 1887.) ZzZ 4 



