87 



of this group not being flat, as would seem to be implied by it. He 

 then characterizes and describes the genus as now restricted : and 

 subseąuently characterizes the several species referrible to it, in- 

 cluding the one generally known in the markets ; a second, ■which 

 ■vvas originally described by Say ; and three others, now for the first 

 time noticed, which were obtained by Mr. Cuming on the coast of 

 Chili, and which fonn part of the Society's CoUection, having been 

 presented to it, together ■vvūth the ■vvhole of his Crustacea, by that 

 gentleman : the new species are also described in detaU. Mr. Bell 

 calls particvdar attention to the fact, that nearly every one of the 

 structural characters indicated by Dr. Leach in the common Crab 

 as specific, are, in reality, generic marks ; all the known species 

 agreeing, without exception, in the margin on each side having nine, 

 or more properly ten, di\dsions (the lašt being obsolete) ; in the front 

 being trifid ; and in the carapace being granulated. 

 The characters of the species are as follows : 



Genus Cancer, Leach. 



1. Cancer LONGiPES. Canc. testd leviter granulatd, sparsim pune- 

 tatdį margine antico-laterali decem-lobato, lobis contiguis, ad 

 marginėm minute denticulatis ; manibus Icevibus, estus lineis quin- 

 que impresso-punctatis ; pedibus longioribus ; abdominis articulo 

 ultimo aguilateraliter triangulari. 



Long. 3-į-; lat. 6 unc. 

 Hab. apud Valparaiso, Dom. Cuming. 



Supra pallidė ruber flavo obsolete punctatus ; subtiis flavescens. 

 Chelarum apices nigrescentes. 



2. Cancer EnwARDsii. Canc. testd granulatd j margine antico- 

 laterali decem-lobato, lobis latis, contiguis, profunde dentatis ; 

 manibus suprd. obsolete tuberculoso-carinatis ; maris abdominis ar- 



/ ticulo ultimo antice producto. 

 Long. 5-i- ; lat. 7-}- unc. 

 Hab. apud Valparaiso, Dom. Cuming. 

 Supra rufescenti-brunneus ; subtus flavus rufescente varius. 



3. Cancer dentatus. Canc. testd granuloso-scabrd, hispidd; mar- 

 gine antico-laterali decem-dentato, dentibus lanceolatis, denticu- 

 latis ; manibus tuberculoso-bicarinatis, extus lineis quinque longi- 

 tudinalibus granulatis ; pedibus pilosissimis. 



Long. 4 ; lat. 5-^ unc. 



Hab. apud Valparaiso, DD. Cuming et Miller. 

 Suprži saturatė rufescenti-brunneus flavo (praesertim in junioribus) 

 varius ; subtus rufus flavo varius. 



4. Cancer irroratus, Say. Canc. testd leviter granulatd ; mar- 

 gine antico-laterali decem-lobato, lobis contiguis, quadratis, ad 

 marginėm denticulatis ; manibus compressis, dentato-bicristatis. 



Hab. ad oras Floridarum, Say, et Americae Australis, DD. Cuming 

 et Miller. 



