72 REPORT OF COMMISSIONERS OF INLAND FISHERIES. 



Occasionally species of two genera, Planes and S e s a r m a , are 

 found in these waters, but neither form is common. 



(Genus) PLANES Leach. 



Planes minutus Linnaeus. "Gulf-weed Crab." 



Plate IV. Figure 20, 



This is a small pelagic form, common in the gulf stream. The 

 carapace is slightly longer than broad. The antennse are covered 

 by the front. It is much smaller than S e s a r m a , a female bear- 

 ing eggs measuring but 14 mm. in length and 13 mm. in width. 



It is found at the surface among the floating gulf-weed. 



(Genus) SESARMA Say. 



Sesarma retieulatum Say. 



Plate V. Figure 22. 

 Sesarma retieulatum Say. Verrill and Smith, 1874. 



Smith gives the following description of this species: "a stout 

 looking reddish brown crab with a squarish carapace; large claws, 

 stout and nearly equal." There is a sharp tooth just back of the 

 orbital angle. 



Habitat: salt marshes , in burrows. 



(Family) PINNOTHERID^ Milne Edwards. 



In this family the front, orbit, and eyestalks are usually very small. 

 The buccal frame is arcuate anteriorly. All of its representatives 

 are small. Two genera, P i n n i x a and Pinn otheres, will be 

 described. 



(Genus) PINNIXA White. 



The carapace is convex, much broader than long, and firm in 

 contrast to the more or less membranaceous carapace of Pin- 



