STALK-EYED CRUSTACEA 357 



A. Antennular peduncle greatly elongated ; the first 

 joint deflexed, and as long as or exceeding the eye-stalks ; 

 one of the flagella enlarged. 



a. Antennal peduncle compressed; terminal joint long. 

 — ( CcenobitidcF.) 



B. Antennular peduncle of moderate size, the first 

 joint short and stout; flagella small. 



b. Antennal peduncle subcylindrical. — {Paguridcs.) 



II. Gills in the form of round threads. — (Branch II., 

 Fibribrajichiata.) 



C. Antennular peduncle elongated or of moderate size, 

 first joint short and stout ; flagella small. 



c. Antennal peduncle subcylindrical. — {Parapagii- 

 ridce?) 



Branch I. Laminibranchiata. 



Gills in the form of flat plates. 



Family I, CcEnobitidae. 



CccnobitidcB Dana, Stimpson, Haswell, 



Henderson. 



Antennular peduncle greatly elongated ; the first joint 

 deflexed, and as long as or exceeding the eye-stalks, the 

 second and third joint narrow and cylindrical ; one of the 

 flagella enlarged. Antennal peduncle compressed ; the 

 terminal joint long. 



Found on land near the sea or on the seashore 

 in hot countries. To this family belongs the genus 

 Bergiis, found in the Pacific, who is said to be able to 

 open a cocoanut with his claw. They are of large 

 size. 



