Notes on North American Crustacea. 63 



menippe nodifrons, nov. sp. 



Carapax narrower than is usual in the genus ; upper surface areolate 

 and somewhat nodose anteriorly. There are six knobs on the gastric 

 region ; — four in a transverse row across the middle, and two in front. 

 There are also two knobs just above the median frontal lobes, and a large 

 one on the hepatic region. There is a short blunt ridge on the anterior 

 part of the branchial region, curving outward and backward to the 

 lateral tooth. The surface between the knobs is minutely punctate. 

 Front considerably projecting, and deeply emarginated at the middle, 

 forming two prominent but thick and rounded teeth, between which and 

 the angle of the orbit there are on either side two other teeth, small and 

 tuberculiform. There is a prominent blunt tooth at either extremity of 

 the inferior margin of the orbit ; the outer one having another smaller 

 one above it, belonging to the superior margin. Antero-lateral margin 

 armed with four teeth besides the angle of the orbit ; the teeth promi- 

 nent but blunt at the tips, and not sharp-edged as in M. mercenaria 

 {^Cancel' meixenaria, Say). Chelipeds robust, microscopically granu- 

 lated above. Ambulatory feet not compressed ; the last three joints 

 sparsely hairy on the sides, but densely so on the upper and lower sur- 

 faces. Abdomen like that of M. mercenaria. Dimensions of carap. in 

 the male; length, 1'32; breadth, 1"90 inch. 



This fine species has mucli the aspect of a Xantlio. It Avas 

 found at Indian River, on the coast of Florida, by G. Wurde- 

 mann, Esq. Mus. Smithsonian. 



Menippe obtusa, nov. sp. 



Carapax smooth and even, flattened posteriorly. Antero-lateral 

 margins armed with four teeth resembling those of M, mercenaria in 

 their proportions, but much less prominent. Front with a single tubercle 

 only on either side of the two median lobes. Frontal region somewhat 

 channelled along the margin above the teeth. There are two or three 

 submarginal tubercles along the inferior side of the orbit, and a few 

 scattered granules on the subhepatic regions. The meros-joint of the 

 outer maxillipeds is as long as broad, pentagonal, with the antero- 



