442 ^ OBSERVATIONS. [November, 



Observations on some of the Animals described in the 

 Account of the Crustacea of the United States* By 

 Thomas Say, 



Oc Y p D E ( Sesarma) reticulatus* It would be more 

 correct to refer this species to the genus Grapsus by its 

 ©ral characters, than by its habit to Ocypodc. 



Gr A p s u s cinereus. Since publishing the description 

 of a species which I referred to this name, p. 99, I have 

 found a distinct species, which from its locality I judge to 

 be the true cinereus of Bosc and Lat. It is very numerous, 

 inhabiting the bay of Charleston, the southern coast gen- 

 erally, and East Florida as high as fifty or sixty miles up 

 the river St. John. I have not met with it so far north as 

 the coast of Newjersey. It is widely distinct from the 

 species before mentioned, although the brief description 

 which has been given of it by authors, will apply equally 

 well to both. Mr. Latreille interrogatively refers to 

 Sloane'sCancellus marinas minimus quadratus as synony- 

 mus with cinereus; but as that species, from the lateral 

 thoracic curvature, general form of the body, and mode of 

 life, is without a doubt intended for the species described 

 page 99, under which I have quoted it, we must suppose 

 that it is an anonymous species, and not the cinereus^ nor 

 yet the minutus, to which it next approaches. I there- 

 fore appropriate to it the i.ame of pelagicus, significant 

 of its mode of life. The cinereus differs from the pela- 

 gicus in many striking characters, in having the thorax 

 quadrate, the lateral edge not being arquated, nor hav- 

 ing a sinus near the anterior angles, and the three ter- 

 minal joints of the feet arc not ciliate with hair on the ^n- 



