STALK-EYED CRUSTACEA 359 



them. The terminal appendages of the last abdominal 

 ring are brick-red. 



They are found among the trees under the Fort, near 

 the sea. 



Family II. Paguridae, 



Pagnridce . . Dana, Stimpson, Henderson. 



Antennular peduncle of moderate size, the first joint 

 short and stout, the second and third slender, cylindrical ; 

 both flagella of small size. Antennal peduncle sub- 

 cylindrical. 



Range. — Most seas ; in shallow and deep water. 



Synopsis of the Genera, 



I. Abdomen spirally twisted or bent abruptly, soft 

 and membranous, the segmentation imperfect. — {Pagui-incE, 

 Dana). 



A. First and second abdominal segment without 

 genital appendages. 



a. Fourth pair of legs chelate or subchelate. Males 

 without a protruded vas deferens. 



a}. A rostrum present, Flagellum of external antennae 

 naked. 



d^. Eye - stalks thin and long ; basal scales close 

 together. 



a^. Fingers move in a vertical plane. — {Calcinus.) 



b^. Fingers move in a horizontal plane. — {Cliba- 

 imrius.) 



b^. Rostrum distinct or slightly marked, E}'e-stalks 

 stout ; basal scales wide apart. 



b'^. Abdomen well developed. 



c^. Fingers move in a vertical plane. Flagellum of 

 external antennas long and r\3ke6.—{Pagurus.') 



