218 Mr. L. Reeve on the genus Scarabus. 



bulls albis. Iris rubro-argentea. Pinna dorsalis ; pars prima obscure 

 rubra, rivulis paucis subpellucidis, postice nebula nigra oblonga; 

 pars posterior antice, prope basin, macula intense sanguinea notata, 

 alias rubicunda maculis nigricantibus adspersa. Pinna ventralis 

 sanguinea, nebulis pellucidis. Pinna analis sanguinea, maculis pau- 

 cis nigris. Pinna caudalis rotundata, rubra, maculis nigris in quatuor 

 fascias per radios dispositis ornata. Membrana connectens immacu- 

 lata." 



[To be continued.] 



XXVI. — On the genus Scarabus, a small group of Pulmo- 

 branchiate MoUusks of Hhe family Auriculacea. By Mr. 

 LovELL Reeve, A.L.S. 



[With a Plate.] 



To the Editors of the Annals of Natural History. 



Gentlemen, 

 Having collected together an interesting series of Scarabi, 

 as examples of that genus, for the forthcoming number of my 

 ' Conchologia Systematica,^ I send you my plate of them ac- 

 companied with the following notices, not intended for publica- 

 tion there, which you are at liberty to make use of if you think 

 proper. The fact of there being so few species of this genus 

 yet described, and even these referred to by authors with no 

 little inaccuracy, induces me to think that a few observations, 

 though brief, will be esteemed of some conchological interest. 

 No descriptions are given, nor are any of the localities men- 

 tioned ; I am unwilling that this paper should be accepted as 

 a monograph, as my friend M. Petit de la Saussaye is zea- 

 lously employed at this moment in preparing a complete 

 history of the family to which the genus Scarabus belongs. 



SCARABUS, De Montfor^. ^ 



The genus Scarabus is one of the few that I have adopted 

 out of the many proposed by De Montfor^ in his ^ Conchy- 

 liologie Systematique.^ The earliest figure which I am able 

 to trace is one of the Scarabus Petiverianus given by Petiver 

 under the title of Cochlea Bengalensis in his ^ Gazophylacia 

 Naturae f another species, the Scarabus imbrium, figured by 

 Chemnitz, was then described by Linnaeus amongst the He- 

 lices, and probably supposed to be the same. Bruguiere in- 

 cluded it in his miscellaneous assemblage of Bulimi, and it 

 was removed with others by Lamarck for the formation of the 



