STALK-EYED CRUSTACEA 33 



region there is a large lateral spine almost as large as the 

 lateral branchial spine ; the spine curves outwards and 

 forwards. Rostrum long ; the horns at first diverging 

 then more or less parallel. A large prseocular and a 

 small postocular spine. Basal joint of external antennae 

 has a sharp spine on antero-external angle. Buccal 

 cavity has a large spine at antero-external angle. The 

 extremity of every fourth joint of legs spinous. 



Range. — St. Kitts, Martinique, St. Lucia, St. Vin- 

 cent, Havana. 



2. Anamathia crassa. 



AnainatJiia crassa\ 



. ,, . . . A. Milne Edwards. 



Ainatliia crassa J 



Aniathia agassizii . . Smith. 



Carapace has the spines smaller ; the anterior lateral 

 spine being much smaller than the lateral branchial spine. 

 The rostral horns are large, and diverge from their origin. 

 A long priEocular and a small postocular spine. Basal 

 joint of external antennae has a spine at its antero- 

 external angle and a second spine half-way on its 

 external edge. There is no spine at antero-external 

 angle of buccal cavity. There are spines on the 

 extremity of each fourth joint of legs. 



Range. — Cuba, Florida. 



3. Anamathia modesta. 



Aniathia modesta . . A. Milne Edwards. 



Carapace has twelve spines, the two on the gastric 

 region being only spiniform tubercles. The lateral and 

 posterior spines are longest ; that on the outer edge of 

 the branchial region being one-fifth the width of the 



