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 

 subsequently characterizes the several species referrible to it, in- 

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

 was 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 form part of the Society's Collection, having been 

 presented to it, together with the whole of his Crustacea, by that 

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

 calls particular 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, divisions (the last 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. Cane, testd leviter granulatd, sparsim punc- 

 tatd; margine antico -later ali decem-lobato, lobis contiguis, ad 

 marginem minute denticulatis ; manibus l(Bvibus, extus lineis quin- 

 que impresso-punctatis ; pedibus longioribus ; abdominis articulo 

 ultimo aquilateraliter triangulari. 



Long. 3-J-; lat. 6 unc. 

 Hab. apud Valparaiso, Dom. Cuming. 



Supra pallid^ ruber flavo obsolete punctatus ; subttis flavescens. 

 Chelarum apices nigrescentes. 



2. Cancer Edwardsii. Cane, testd granulatd ; margine antico- 

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

 manibus suprh obsolete tuberculoso-carinatis j maris abdominis ar- 



, ticulo ultimo antice producto. 

 Long. 54-; lat. 74- unc. 

 Hab. apud Valparaiso, Dom. Cuming. 

 Supra rufescenti-brunneus ; subtiis flavus rufescente varius. 



3. Cancer dentatus. Cane, testd granuloso-seabrd, hispidd; mar- 

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

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

 tudinalibus granulatis ; pedibus pilosissimis. 



Long. 4 ; lat. 5i unc. 



Hab. apud Valparaiso, DD. Cuming et Miller. 

 Supra saturate rufescenti-brunneus flavo (prsesertim in junioribus) 

 varius ; subtus rufus flavo varius. 



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

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

 marginem dentictdatis ; manibus compressis, dentato-bicristatis. 



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

 et Miller. 



