228 



THALASSINAD,^'.. 



DECAPOD A. 



MAVROURA. 



THALASSINADM. 



Axius Stirynchus. 



Axius Stirijnchus, Leach, Trans. Lin. Soc. XL p. 343. Mai. Crit. t. xxxiii. 

 — Desmar, Consider, sur les Crust, t. xxxvi. fig. L P- 

 207. — GuER. Icon. Crust, t. xviii. fig. 5. — Edw. Hist. 

 Nat. Crust. IL p. 31L 



The carapace in this species is nearly semi-cylindrical, 

 but somewhat compressed at the sides ; the gastric region 

 punctate, scabrous ; the rostrum short, elongate-trian- 

 gular, having a raised margin and a raised longitudinal 

 median line. The first abdominal ring A^ery short, fur- 

 nished with a pair of rudimentary false feet ; those of the 

 four succeeding rings are fully developed, natatory, com- 

 posed of a short and thick peduncle, which bears at its 

 extremity a small styliform appendage, and two large oval 

 lamiuEe, having the margins ciliated ; the terminal segment 

 is elongate-triangular ; and the two pairs of lateral caudal 



