168 CRUSTACEA. BECAPODA, 



A. mtescens, Leach. Rostrum straight and simple. 8 or 9 lines 

 long. Inhabits coast of Devonshire. Lin. Trans, xi. 349. 



Gen. 69. ATYA, Leach. 



Four anterior legs equal, the last joint cloven ; third pair larg- 

 est, .unequal, with a simple claw ; fourth and fifth pairs sim- 

 ple ; tail broad, the intermediate lamella with its extremity 

 rounded ; shell smooth, semicylindrical, terminated before by 

 a small rostrum, and truncated behind. 



A. scabra, Leach. Rostrum carinated, trifid, the middle tooth larg- 

 est ; six hinder legs rough Supp. Encyc. Brit. i. pi. 21. 



Gen. 70. EGEOX, Risso. 



Fourth or last joint of the exterior feet-jaws nearly twice larger 

 than the preceding ; second pair of feet extremely short, slen- 

 der, and didactyle ; the third long, very slender, and simple ; 

 the fourth and fifth pairs with a compressed claw ; shell elon- 

 gated, cylindrical, spinous, with a small rostrum before. 



E. loricatus, Risso. Shell with three longitudinal carinae ahove ; 

 rostrum very short. 1^ inch long. Inhabits coasts of Europe. B. 

 Risso, Crust. 100. 



Gen. 71. CRANGON, Fab. Lat. 



Anterior pair of legs largest, with a compressed monodactyle 

 hand ; the second and third pairs more slender, the fourth 

 and fifth thicker ; exterior antennae setaceous, the length of 

 the body ; the intermediate divided into two filaments ; shell 

 thin, semitransparent, with a short rostrum before. 



C. vulgaris, Lat. The Shrimp. Thorax behind, and on each side 

 of the rostrum unispinose ; body transparent, pale glaucous green, 

 dotted with gray. 2 inches long. Inhabits sandy coasts of the 

 European ocean. B Penn. Brit. Zoo/, iv. pi. 16, fig. 2. 

 This species lives in numerous troops, and are found near the shore swimming on 



their back with great facility. Large quantities are taken for sale. 



Gen. 72. PANDALUS, Leach. Palcemon, Risso. 

 Anterior pair of legs adactyle ; second pair didactyle, unequal ; 

 exterior feet-jaws with the last joint of the internal peduncle 

 longer than the preceding ; intermediate antennae shortest, 

 bifid, the exterior ones longer than the body, setaceous, with 

 an elongated scale at the base. 



P. annulicornis, Leach. Rostrum ascending, many-toothed ; apex 

 notched ; inferior antennae annulated with red, and internally 

 spinous. 3 inches long. Coasts of Britain Lin. Trans, xi. 346. 



Gen. 73. PASIFILEA, Savig. 



Intermediate antennae terminated by two filaments ; exterior 

 feet-jaws serving for locomotion ; first two pairs of feet di- 

 dactyle, the third and following much smaller, almost capil- 



