ON THE SPECIES UPOGEBIA STELLATA AND C4EBIA DELTURA. 



477 



In large specimens it is easy to distinguish between deltura and 

 stellfda. The width of the abdominal plates in deltura is very 

 noticeable, and the rostrum is blunter. It is altogether a more 

 massive animal, and the spotted appearance, whence the name stcllata. 





Fro. 1. — Upogebia stellata, showing spine. 

 Cam. luc. X 27. 





Fig. 2. — Gebia deltura. 

 Cam. luc. X 27. 



is wanting. In deltura the dactylopod is stouter and blunter, and 

 more nearly equals the process of the propodite in length. On the 

 inner side, where the dactylopod hinges, there are two blunt 

 spines. In stellata the "fingers" are much slighter, the dactylopod 

 longer and slenderer, and the opposite process smaller, than in deltura. 



