EUPAGTJETJS. 501 



of other Decapods (Branchial groove, Bouvier). It is 

 very deep and is the more clearly outlined by reason of 

 the comparatively dense calcification of the region in 

 front of it. The homologies of the terms by which 

 writers have described the other grooves and lines of the 

 carapace are not altogether clear, but the following 

 account — principally based on Borradaile — summarises 

 the accounts of the various writers. 



7 * 



Text-Fig. 1. 

 Anterior to the cervical groove (c. Boas, c. Bouvier, 

 and 2 and 2' Borradaile) is a deep longitudinal groove 

 extending forwards to the edge of the front. Bouvier 

 calls this the linea anomurica, and Boas calls it line b. 

 This longitudinal groove is continued as a faint crease 

 to the back of the carapace, and this portion Boas calls 

 the linea anomurica. Borradaile combines the naming of 

 the two others, calling the whole line from end to end the 

 linea anomurica. A small crease (la 1 ) passing vertically 

 downwards from this line on a level with the cervical 

 groove is also part of the linea anomurica according to 

 Boas. Bouvier and Borradaile do not recognise it. A 

 small longitudinal groove above the linea anomurica and 

 parallel to it starts from the cervical groove and passes 



