STALK-EYED CRUSTACEA 371 



are triangular, and terminate in a spinule. The ocular 

 peduncles are shorter than the frontal border. The 

 walking legs are smooth. 



Range. — St. Vincent, Martinique. 



5. Ostraconotus. 



Ostraco7iotus . A. Milne Edwards, A Milne Edwards 

 and Bouvier. 



The carapace is short, its lateral edges are slightly 

 rounded ; it is wide behind. The eye-stalks are large 

 and short ; cornea well developed ; basal scales apart. 

 The external antenna; have an acicle ; the internal 

 antenna; are long and thin. The branchial lamins, in 

 two rows, are undivided. The first pair of legs subequal, 

 the right the strongest ; the fingers move in a horizontal 

 plane, and terminate in calcareous tips with traces of a 

 rudimentary nail. The walking legs have flat terminal 

 joints ; the penultimate pair is monodactyle, as is also 

 the last pair. 



The abdomen is atrophied. 



Range. — West Indian Sea. 



I. Ostraconotus spatulipes. 



Ostraconotus spatulipes ... A. Milne Edwards and 



Bouvier, A. Agassiz. 



The basal ophthalmic scales are separated by a 

 moderate space. The eye-stalks are compressed on their 

 inner face. The first pair of legs unarmed. The pincers 

 arc a long oval. The walking legs have their fourth joint 

 long and strong. The penultimate pair is much larger 

 than the fifth pair; its penultimate joint is flat and dilated. 



Range. — Barbados ; in deep water. 



