495 



L.M.B.C. MEMOIRS, 



No. XXI. EUPAGURUS. 



H. G. JACKSON, M.Sc. 





CONTENTS 







PAGE 





PAGE 



Classification ... 



... 495 



Excretory System 



524 



External Characters ... 



... 499 



Nervous System 



528 



Appendages 



... 503 



Sense Organs ... 



533 



Endophragmal Skeleton 



... 508 



Muscular System 



540 



Integument 



... 509 



Reproductive System 



541 



Alimentary Canal 



... 510 



Development ... 



547 



Blood Vascular System 



... 515 



Bionomics and Econo 



mics ... 554 



Respiratory System ... 



... 522 







CLASSIFICATION AND DISTEIBUTION. 



Eupayurus bernhardus (Linn.) is a Crustacean 

 belonging to the sub-class Malacostraca, the series 

 Eunialacostraca, the division Eucarida, and the order 

 Decapoda.* 



The Decapoda may be divided into two sub-orders, 

 the Natantia and Reptantia.f The Reptantia contains 

 four tribes, the Palinura, Astacura, Anomura and 

 Brachyura. The Hermit Crabs are included in the super- 

 family Paguridea of the Anomura, and the following is 

 a detailed statement of the families and sub-families of 

 the Paguridea : — 



Pylochelidae. — Abdomen macrurous and sym- 

 metrical with all the limbs present. Trichobranchiate. 



Coenobitidae. — Abdomen more or less unsym- 

 * Caiman. Ann. & Mag. Nat. Hist. Ser. 7, Vol. XIII. , 1904. 

 t Borradaile. ibid., Ser. 7, Vol. XIX., June, 1907. 



