C A R I D E A. 



595 



see out between the carapax and the bases of the antennae, a very 

 narrow space, that may be opened a little by the depression of the 

 antennae. The body is somewhat depressed, as in Pontonia and 

 CEdipus, and the beak is rather short, and in form is oblong-trian- 

 gular, with a keel above, which is dentate. The outer antennae are 

 situated mostly below the inner. The scale is large, and one-third 

 or more of its length is beneath the carapax. The terminal process 

 of the mandible has three strong triangular teeth, and the palpus is 

 rather long and slender, with the joints subequal. The outer maxil- 

 lipeds are narrow, with the penult joint a little more than half the 

 preceding in length, and hardly one-half longer than the last joint. 

 The abdomen is rather broad, and terminates in a narrow segment, 

 the sides of which (in our dried specimen) are curved downwards, so 

 as to make nearly a cylinder. The abdominal appendages have an 

 oblong base, which is calcareous externally like the carapax. The 

 legs are nearly as in other PalaemoninaB. The first pair is slender and 

 about as long as the second; the second is rather stout, with an 

 oblong hand ; the fingers are similarly acuminate, but still are spoon- 

 excavate as seen under a magnifier. 



The name of the genus alludes to the concealed eyes, and is from 

 x£t/0<««, concealed, and *^, eye or sight. 



The only species seen was found in fresh-water streams. 



Cryphiops spinuloso-manus. 



Rostrum triangulatum, squama antennali brevius, basin antennarurn 

 intemarum superans, supra ceque 7-dentatum, infra prope apicem uni- 

 dentatum. Pedes 2di Imos vix superantes, minute spi7iulosi, manu 

 plus duplo longiore quam carpus, digitis dimidio manus longioribus, 

 apice minute; coclileari-excavatis. Pedes antici nudiusculi, manu infra 

 hirsutd. Pedes 6 postici quoque nudiusculi, articulo bto infra parce 

 arrnato, tarsis unguiculatis. 



Beak triangular, shorter than antennary scale, extending beyond base 

 of inner antennas, above regularly seven-toothed, below a single 

 tooth near tip. Feet of second pair hardly reaching beyond the 

 first, minutely spinulous, hand more than twice as long as carpus, 

 fingers longer than half the hand, minute spoon-excavate at tip. 



