MACEOURI. 221 



Exuviation ensues at all seasons, the shell or slough separating quite 

 entire. Like the former, it is perfectly transparent, and has much of a 

 gelatinous aspect when raised from the water. 



Plate LXI. 



Fig. 1. Pandalus anntilicornis — Ring-horn Shrimp — adult, back. 



2. Cast shell of Crangon. 



3. Another specimen of Pandalus. 

 ■i. Cast shell. 



The preceding remarks must suffice for the meantime, though the 

 reader would find many others very interesting on a more comprehen- 

 sive survey. 



One of the genus Hippolytus, so named by Dr Leach, is represented 

 Plate LXL fig. 5. 



