2qa NATURAL HISTORY BULLETIN. 



protogastric lobes with faint longitudinal impressed lines. 

 Lateral margin with a small sharp spine about the middle of 

 its length; margin behind the spine tuberculous. Front with 

 a median tooth, elevated, blunt, smooth at the tip, having a 

 median sulcus, concave beneath, forming the roof of the buc- 

 cal cavity; on either side is a depressed and inconspicuous 

 tooth. Preorbital tooth large, subacute, not quite so advanced 

 as the front. Postorbital tooth acute, directed obliquely for- 

 ward. Endognath of maxillipeds longitudinally grooved. 

 The left cheliped, the only one with the specimen, is very 

 slender and coarsely granulate; the fingers as long as the palm. 



Dimensions. — Female, length 2.8, width 3 mm. 



Type locality.— OH Trinidad, lat. n° 07' N., long. 62 14' 

 30" W., 73 fathoms, station 2120, one female (U. S. Nat. 

 Mus. No. 20510). 



