EXPLANATION OP PLATE I, 



All the figiires refer to Cerapus flinderd. 



A. — View of a portion of one end of the tube with the animal (a large 

 male) in it, x 9'5. 



P>. — Dorsal view of the same animal when extracted from the tube, x 9'o. 

 The bases of the antennae are shown, also a portion of the second 

 gnathopoda and the last pair of pereiopoda ; the other limbs 

 being concealed from view. The pleon is bent back under the 

 body. (The front of the head in figures A. and B. has been 

 drawn much too broad.) 



a. s. — Upper antenna x 22*5. 



a. i. — Lower antenna x 22'5. 



gn. 2(? A. — Second gnathopod of large male, x 22-5. 



gn. 2 S B. — Second gnathopod of younger male, x 52. 



gn. 2 9 . — Second gnathopod of female, x 90. 



prp. 3 (? . — Third pereiopod of large male, x 52. 



prp. 3 ? . — Third pereiopod of female, x 52. 



ur. 1. — First uropod ^ 



ur. 2. — Second uropod 



ur. 3. — Third uropod 



T.— Telson / 



-Seen from above, all x 90. 



