156 



The fourth male, fiually, of the same size as the 3^, is — — — 



ö 



dentate, and presents quite normal characters, except that there 

 is bilt one tooth on the carapace ; this tooth is apparently the 

 second, for the place of the l*'^ is indicated by a minute pro- 

 minence, which, however, is colonred by a sinall red spot, similar 

 to tliose with which the body is marked. 



A similar abnormality as in the fourth male, jiist described, exists 

 in a female without eggs, long 69 mm., in which the rostrum 



5-4-2 

 is ~~- dentate. In this specimen, however, not only the l^t but 



even the 4fh tooth are only indicated by a minute prominence, 

 so that there is again only one tooth on the carapace ; both pro- 

 minences are marked with the usual red spots, so that the teeth 



are not broken off. 



5 4-2 

 In the second female, long 69 mm., the rostrum is — - — dentate 



o 



and is of normal appearance, except that the foremost or 5^'i tooth 

 of the upper margin, situated just behind the middle of the frec part 

 of the rostrum, is separated by a long interspace from the l^t 

 apical tooth and this interspace is nearly as long as the distance 

 between the 2*^ and the S'^i tooth. 



9+1 

 The third female, which is 65 mm. long, is — - dentate. 



The rostrum presents normal characters, but the 6tli tooth of 

 the upper margin is almost twice as large as the preceding and 

 more prominent, while the three following teeth are situated 

 much closer together than usually ; the 2^ tooth of the lower 

 margin, finally, is rudimentary. 



o I 1 



The last female is 75 mm. long and — - — dentate; it appcars 



only peculiar hy the e.ctraordinarily small size of the apical tooth. 



Looked at from the lateral side, the carapace of this species 

 appears slightly concave above between the gastric and the some- 

 what convex, smaller, cardiac region. 



Branchiostegal spine as large as the antennal one and situated 

 at the margin of the carapace ; both spines project beyond it. 



