122 



THE LIFE OF CRUSTACEA 



are very closely allied to the Norway Lobster 

 (Nephrops) of shallow water, have very short and 

 slender eye-stalks hidden under the rostrum, and 

 showing at the tip only the merest traces of what 



FIG. 42 A DEEP-SEA LOBSTER (Nephropsis stewartii), FROM THE 

 BAY OF BENGAL. REDUCED. (After Alcock and Anderson.) 



was once an eye. In the lobster-like Eryonidea 

 (see Fig. 46, p. 133), the reduced eye-stalks are firmly 

 fixed in notches in the front edge of the carapace. 

 Some of the deep-sea Crabs and Prawns seem also 

 to be totally blind. In a great many cases degenera- 



