50 MR. S. HAKLEY ON THE LINNEAN MS. OF THE ' MUSEUM ULUIC^.' 



descriptions of the "rima" and "anus" have been added: "recurvati" 

 and " fossula distincti '* were amplifications. 



C. Unedo. Buc. subcordatum, sulcis lunulis coloratis. 



C. MURICATUM. Buc. subrotundum sulcatum, lateribus muricatis. 



C. MAGNUM. Buc. oblongum, sulcis angulatis latere serratis. 



I had hoped to have found the 19 a misprint, but the MS. and the 

 printed copy agree precisely in every particular. 



C. FLAVUM. Buc. subovatum sulcatum, latere altero scabrum, altero 

 dentatum. 



The redundant " subovata " was not in the copy, where the remark was 

 made that the species resembled the shell subsequently termed Chama cor, 

 the figure of which (Gualt. t. 71. f- E.) had been cited, but erased in the 

 MS. The ideal hence derived is a very diff^erent shell from the one sup- 

 posed identical. No mention is made of lateral teeth : was it then a veri- 

 table Cardium ? 



C. LiEViGATUM. Buc. ovatum, striis laeviusculis longitudinalibus. 



I do not consider this (the B. striatum of the MS.) to be identical with 

 the C. IcBvigatum of the * Systema.' 



C. SERRATUM. Buc. ovalc laevc, antice serratum. 



" Ovata " stood in the place of the printed " obovata " : " curvatus " 

 and " parvi " were subsequent to the MS. 



C. TRiSTE. Buc. ovatum Iseve, rima anoque obsolete striatis. 



The * Museum ' was referred to for this shell previously to the publication 

 of the details. Curious to relate, the species was wholly omitted in the 

 twelfth edition of the ' Systema.' It was, in all probability, a Mactra, 

 which genus had not been constituted at the period when the description 

 of C. triste was issued. 



C. PECTINATUM. Buc. subcordatum, striis hinc longitudinalibus, illinc 

 transversalibus. 



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



Mention was made in the * Systema ' of a Solen buUatus, for a more 

 detailed account of which the reader was referred to the * Museum Ulricas.* 

 No such species appeared in the published edition ; but the omitted shell 

 (a veritable Cardium) was thus described in the unprinted version : — 



Buc. BULLATUM. B. subrotuudum, antice crenato-hians. 



Rump. 143. t. 44. f. N. Pecten buUatus. 



Testa subrotunda, inflata, gibba, fragilis, pellucida, substriata, rufo ne- 

 bulosa, antice hians, margine serrato. Umbones tumidi, obtusi, reflexi. 

 Rima minima brevissima. Ani regio obsoleta. Dens cardinis fere unicus, 

 minimus. Marginales solitarii, remoti, compressi, majores. 



DONAX. 



Trunculus was the proposed name of this genus, which was thus 

 characterized : — 



Testa compressa, antice obtusissima, retusa. Cardinis dentibus 2, mar- 

 ginis unicus. 



