ME. S. HANLET ON THE LINNEAN MS. OF THE ' MUSEUM ULRICA.' 85 



H. H.ffl:MASTOMA. H. imperforata subrotunda fusca fascia longitudinal! 

 subrecta alba, ore purpureo. 



H. DEcoLLATA. H. clongata laevis truncato-mutilata. 



"Pet. Gaz. t. 66. f. 1", and "Habitat in Arabia. Hasselquist. Santa 

 Cruz. Petiv." were the unprinted additions. The entire account was in the 

 handwriting of our author. 



H. AMARULA. Nerita edentula oblonga, anfractibus multifariam den- 

 ticulatis. 



Our author was evidently puzzled as to the generic position of this pecu- 

 liar-looking shell, for he has written " Habitu accedit ad Volutas vesper- 

 tiliones, ore Helicibus, sed labium interius planum, et affinitas cum ante- 

 cedenti fiat, ut hie relinquatur." The preceding shell alluded to was iV. 

 corona. 



H. Neritoidea. H. convesa longitudinaliter striata. 



The erroneous reference to Gualtieri was not present in the written copy. 



H. PERSPicuA. H. convexo-ovata, labio interiore nullo, apertura ad 

 apicem usque pervia. 



The then unpublished details of both this and the preceding were re- 

 ferred to in the tenth edition of the ' Systenia.' Patens was the proposed 

 specific appellation. 



H. HALiOTOiDEA. H. depresso-plauiuscula obtusissima, ore ovali 

 dilatato. 



None of the cited figures were at first accepted by our author, who only 

 added that of Rumphius to the earlier description, and wholly omitted the 

 rest. "Transverse" preceded "striata". 



NERITA. 



Testa subrotunda, obtusa. Labium interius planum, transversim trunca- 

 tum, depressum. 



The generic arrangement was similar to that of the printed version. 



N. CANRENA. N. edentula umbilicata, spira mucronata, labio reflexo 

 bifido. 



When Linnaius first described this shell, under the appellation of JV. 

 musica, he did not admit a single one of the cited figures as illustrative. 



N. GLAUCiNA. N. edentula convexa, umbilico simphci semiclauso gib- 

 boso dicolore. 



None of the deceptive figures were at first referred to, but had been 

 added at a subsequent period ; and that of Rumphius again erased. N. 

 luteola was the intended name. 



N. ALBUMEN. N. edentula subrotunda, umbilico teretiusculo. 



The present heading agrees with the subsequent details, which could not 

 be aflfirmed of the printed one borrowed from the ' Systema.' The MS., in 

 some degree, clears up the extraordinary confusion in which the Linnean 

 species was enveloped. There were two N. albumens in the written copy. 

 The shell here described (assuredly not the lobed albumen of the ' Systema ') 

 was originally termed hepatica or luteola (for both had been erased). The 

 true albumen was described as "edentula subrotuuda, umbilico subcordato. 



