28 ASTACUS. LOBSTER. Class V. 



14. Locusta. C. Locusta. Gm. Lin. 2992. Oniscus Gammarellus. Pal- 

 Locust. Faunt Suec ^ 2042 _ lag msc ZoqL f l4 ^ 25> 



Linn.Tr. ix. 92. taZ>. 4. Jig. 1. 



*L. with four rather short antennce, one pair 

 about one third part longer than the other; 

 body of fourteen joints, very smooth ; on each 

 of the three last joints of the body is a small 

 fasciculus of spines ; claws four, imperfect ; legs 

 ten, the four anterior, smaller; caudal fins 

 five, subulate; color sandy; length about an 

 inch. 



Common on most of our shores. 



15. Pulex. C. Lin. Syst. 1055. No. 81. Herlst. Cane. ii. 130. t. 36. 

 Gm. Lin. 2992. 

 Linn. Tr. ix. 93. t. 4.f. 2. 



Flea - Gm. Lin. 2992. /. 4. 5. 



L. with live pair of legs, and two pair of claws 

 imperfect ; with twelve joints in the body. 



Very common in fountains and rivulets; 

 swims swiftly in an incurvated posture on its 

 back ; embraces and protects its young between 

 the legs ; does not leap. 



* Resembles much the C. Locusta; is about 

 half its length ; wants the fasciculi of spines ; 

 the color paler, and sometimes tinged with 

 green. 



