374 "ENDEAVOUR" SCIENTIFIC RESULTS. 



posterior margin. The carina ends in an evident, though 

 not very conspicuous tubercle, corresponding to the one 

 similarly placed in C. scniistriatus, shown in Bate's figure 

 of that species. Anteriorly this carina is continued for- 

 ward, as the prominent, strongly laterally compressed, 

 up-curved rostrum. As in C. semistriatus, the carapace 

 laterally has two strong, but short carinse. Of these the 

 upper one, terminating anteriorly in the long prominent 

 antennal spine, becomes posteriorly obsolescent and fades 

 out at about the level of the second of the posterior 

 rostral teeth ; while the lower one, though prominent 

 for a somewhat greater distance posteriorly, fades out 

 more abruptly than the upper, so that in effect it extends 

 backward for no greater distance. Anteriorly the lower 

 carina terminates in a strong branchiostegal (Bate's 

 second antenna!) spine. This spine, arising a short dis- 

 tance behind the anterior border of the carapace extends 

 a little outward and forward beyond it; there is a 

 short, shallow groove extending back from the orbit, and 

 a conspicuous indentation of the hepatic region between 

 the two lateral carinae. 



The rostrum above is uniformly armed with four 

 teeth, below with three, except in one young male from 

 off Flinders Island, Great Australian Bight, with what 

 certainly is an abnormally toothed rostrum. In this 

 specimen the anterior dorsal tooth is twinned and the 

 second obsolescent, being represented by only an obscure 

 lobe. Typically the first two rostral teeth, of which the 

 second is the larger, are situated at about the middle of 

 the carapace, the second before, and the first just behind 

 the mid-point. The last two teeth are smaller and rather 

 widely spaced. The third tooth is placed over the eye, 

 and the fourth at about half the distance between the 

 third tooth and the acuminate tip of the rostrum. 



The eyes are as described by Bate for C. semistriatHx. 

 The anteunal scale has the blade broad and rounded 

 anteriorly; the spine is much flattened and at the middle 

 of its length is wider than the adjacent portion of the 

 blade. 



The third maxillipeds are of the same general shape 

 and structure as those of C. scinixtriatus, though rela- 

 tively stouter and shorter, scarcely reaching past the 

 middle of the autenual scale. In C. seniistriatus they 

 reach forward more than two-thirds the length of the 

 scale. 



