94 Mr. Montagu's Description of several Marine Animals 



only to point out the specific distinctions by which at all times 

 it may readily be discriminated. 



It never exceeds half an inch in length : the eyes are inva- 

 riably ovate, not lunated : the three last joints of the body are 

 constantly smooth; and the lower pair of caudal fins are rather 

 the longest. Besides these essential characters of distinction, it 

 is usually more hirsute about the legs than C. Locusta ; the co- 

 lour is paler, and most times tinged with green, especially about 

 the antennae. 



The C. Pulex is as incapable of living in salt water as the C. Lo- 

 custa is in fresh, although we have the authority of Linnaeus 

 and many of his disciples to the contrary. It is also incapable 

 of leaping, and very soon dies when taken out of water. 



The males of this as well as of the C. Locusta are superior in size 

 to the other sex, which they embrace with their arms, and hold- 

 ing securely by fixing their claws in the joint of the thorax, swim 

 about with them, not unfrequently on their back. 



The females of both these species, as well as of most, if not all, 

 of this family appear to be viviparous, and carry their young 

 for some time after birth about the abdomen. 



It is not impossible that Cancer rubricatus, tab. 5. fig. 1. may 

 have also been confounded with these, though inferior in size, and 

 different in colour and form of the antennae, as will be more par- 

 ticularized in the description of that species. 



Cancer Gammarus Saltator. 

 Tab. IV. Fig. 3. 



Cancer Locusta. Brit. Zool. iv. p. 21. No. 34. 

 Oniscus Locusta. Pallas Spic. Zool. 9. t.^.f. 7. Misc. Zool. t. 14. 

 /.15*. 



Body oblong, sub-compressed, smooth, and extremely glossy, 



consisting 



