80 THE VOYAGE OF H.M.S. CHALLENGER. 



minutely spinulose on its posterior margin, a characteristic which is exactly, duplicated in 

 Pj'otosquilla guerinii. 



The two species differ from Protosquilla in the absence of antero-lateral spines on the 

 rostrum, and the enlargement of the tips of the eyes, and from both Protosquilla and 

 Gonodactylus in the presence of spines on the inner edge of the dactyle of the raptorial 

 claw, and the depression of the hind body ; resembling both Squilla and Lysiosquilla in 

 these features. 



The relationships of Coronida are therefore expressed in the accompanying diagram. 



Lysiosquilla, Squilla. 



Gonodactylus. 



Protosquilla. 



Diagnosis. — Hind body depressed, dactylus of raptorial claw dilated at base, and 

 armed with spines on its inner edge. Eostrum ending in a small median spine. 

 Antennary scales and uropods very small. Terminal segments of hind body and telson 

 thickly set with small spines. Carapace flat and nearly rectangular. 



Coronida hradyi (A. Milne-Edwards). 



Gonodactylus bradyi, A. Milne-Edwards, Fonds de la Mcr, vol. ix., 1869, p. 137, pi. xvii. fig. 



11 ; Miers, E. J., On the Squillidae, Ann. and Mag. Nat. Hist., ser. 5, vol. v., 1880, p. 117. 

 Gonodactylus hradyi, Miers, E. J., Crustacea from Mauritius, Proc, Zool. Soc. Lond., January 



5, 1884, p. 16. 



Coronida trachura. 



Gonodactylus trachunis, Miers, E. J., Crustacea from Mauritius, Proc. Zool. Soc. Lond., 

 January 5, 1884, p. 16. 



