496 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



metrical, some of the limbs lost. Generally phyllo- 

 branchiate. Antermal scale reduced. First antenna 

 with very long stalk and flagella ending bluntly. Land 

 forms. 



Lithodidae. — Abdomen bent under thorax. Body 

 crab-like. Carapace firm all over. Fourth legs like 

 third. Rostrum spiniform. Sixth abdominal appen- 

 dages lost. 



Paguridae. — Abdomen more or less unsymmetrical, 

 some of the limbs lost, generally phyllo-branchiate. 

 Antennal scale well developed. First antenna with stalk 

 of moderate length and flagella ending in a filament. 

 Marine forms. 



Sub-family. Pagurinae. — Third maxillipedes 

 approximated at base. Chelipedes equal or 

 sub-equal or the left much larger. 

 Sub-family. Evpagurinae. — Third maxillipedes 

 approximated at base. Eight chelipede 

 usually, left never, much the larger. 



The Eupagurinae contain eighteen genera, two of 

 which, Eupagurus and Anapagurus, are found in British 

 seas. Of the eleven genera which make up the 

 Pagurinae, Diogenes pugilator and Pagurus fasciatus 

 have been recorded from English waters; the former is 

 never further north than the English Channel, and the 

 latter is of such doubtful authenticity that it may be 

 ignored. 



Of the Eupagurinae six undoubted species of 

 Eupagurus and three of Anapagurus are knowu. 



Anapagurus differs principally from Eupagurus in 

 the possession by the male of a genital appendage on the 

 coxa of the fifth left leg. The portion of the carapace 

 in front of the cervical groove is depressed. There are 

 no other differences which can be put on paper, 



