THREE-SPINED SHRIMP. 265 



DECAPODA. CRANGONID^E. 



MACROURA. 



THREE-SPINED SHRIMP. 



Crangon trispinosus. 



Pofitojyhilus irispmosus. Hailstone, Mag. of Nat. Hist. VIII. p. 261, fig. 25. 



Of this species I have never seen a specimen ; I there- 

 fore content myself with copying Mr. Hailstone's descrip- 

 tion, and Mr. Westwood's observations on the species ; 

 premising that the characters, as Mr. West wood very pro- 

 perly remarks, entirely confirm the correctness of Milne- 

 Edwards, and other continental carcinologists, in rejecting 

 the generic separation of Pontophilus from Crangon. 



" On March 1st, 1834, several individuals of a species of 

 PontojjMlus were brought to me, which had been caught in 

 a shrimping-net upon this coast. They had only three 

 spines on the thorax ; one in the middle, and one on each 

 side of it. Their colour was much like a shrimp's, but 

 paler, less clouded, and with a sprinkling of golden blots. 

 Their length about an inch. They were called by the 



