155 



most of tne interantennulary space. When viewed in profile 

 the two posterior limbs each show two small projections, one 

 above the other, on the inner borders. 



The basal antennular joint is rather short, its posterior 

 distal angle produced, reaching nearly to the end of the 

 second joint; the anterior angle is scarcely produced. The 

 second joint is distally truncated, and does not show a slight 

 notch or insinuation above, as in C . tridentata and C. acu- 

 tiraiidata. The under keel is well marked. The third joint 

 is much narrower and about as long as the second; the 

 flagellum has 10-11 joints. 



The antenna has a flagellum of 13 joints, and is slightly 

 longer than its peduncle. 



The legs are of the usual type, rather robust, sparingly 

 spined, their places being occupied by furry pads, even in 

 the first pair of gnathopods. The dactyli are short. 



The mandibles have incisory plates, moderately strong 

 and dentate ; the left mandible has a secondary plate, tri- 

 dentate. The spine row and molar of each are well developed. 



The filaments of the male on the seventh thoracic sternite 

 are short. 



The endopod of the first pleopods is nearly twice as broad 

 as long ; the exopod has a row of well-marked teeth on the 

 external border. The exopod of the second pleopod has a 

 row of teeth and a row of small simple setae close to the 

 external border ; the fringes of the usual setae are very dense. 

 The appendix masmdina is short, and proceeds from about 

 the middle of the inner border of the endopod. The exopod 

 of the third pleopod has a suture rather near the' end, and 

 5 or 6 distal teeth, also a row of small simple setae near 

 the external border. The exopod of fifth pleopod has a dis- 

 tal suture very obscure ; the two lobes which this carries are 

 rather distant from each other. A third small lobe is on the 

 proximal division, rather far down on the inner side. 



The uropods are lamellar. 



The female resembles the male when not young-bearing. 

 The young-bearing female is broader or more ovate and 

 shorter, and the legs are much slenderer; the posterior notch 

 is similar in shape, but rather deeper; the greatest difference 

 is found in the uropods, the shape of which is seen by reference 

 to the figure. The marsupial plates are large and overlap- 

 ping, and the young and eggs are found deep in the body. 

 The mouth parts are strongly modified. The young males 

 and females bear great resemblance to the females of Tlas- 

 weJIid emni'ginata. 



Gulf St. Vincent, from jetty piles. 



