-MACRURA. - SCH MITT. 



Alcock, of which, unfortunately, I have no male specimen 

 for comparison. 



The thelycnm is quite striking and characteristic. 

 On either side of the anterior median plate, which is 

 medially sulcate and anteriorly hastate, the coxae of the 

 fourth legs have developed prominent quadrangular 

 plates, somewhat rolled or turned up on their inner edges. 

 These coxal plates rather overshadow the median anterior 

 plate of the thelycnm. Posteriorly from the level of the 

 hinder margin of each coxal plate, the somewhat curved 

 flattened ear-like lateral plates with raised outer margins, 

 extend inward toward the median line, where they are 

 more or less separated from one another by a quite 

 prominent median, and smoothly rounded tubercle. Just 

 posterior to the inner posterior angle of each coxal plate 

 of the fourth legs is situated a similar more prominent 

 and conspicuous rounded tubercle, one in each antero- 

 lateral angle of the median depressed area of the 

 thelycum enclosed by the lateral ear-like lobes. Behind 

 these, in line with the coxae of the fifth pair of legs, is a 

 thickened, rounded, transverse bar, somewhat swollen on 

 either side of the middle. Near either end the hinder 

 margin of this bar is indented, or rather excavated to 

 accommodate a large raised and rounded oblique lobe. 

 The median anterior plate described as anteriorly hastate 

 above, has a somewhat rounded posterior extension con- 

 nected with it by a narrower portion of the same plate, 

 in effect giving the plate in its entirety a somewhat 

 "dumb-beir'-shaped outline. This posteriorly rounded 

 portion of the plate is flush with the anterior slope of 

 the depressed portion of the thelycum ; the anterior more 

 or less free end is narrower and more pointed than the 

 posterior embedded portion, being as already described. 

 hastate in outline. 



The fourth abdominal somite is dorsally carinated 

 for the posterior two-thirds of its length, but not so 

 sharply as the fifth and sixth, which are carinated 

 throughout their length. The telson has four pairs of 

 lateral marginal spinules, including the subterminal pair. 

 In the female cotype the carina on the fourth abdominal 

 somite, though no longer, is sharper and more prominent 

 than in the other female specimen from Port Jackson. 



Distribution. This species has so far been found 

 only off the coast of New South Wales. I have seen 



