50 MB. S. HANLET ON THE LINNEAK MS. OF THE ' MUSEUM ULRICiE.' 



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

 and " fossula distinct! " were amphfications. 



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



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



C. MAGNUM. Bue. 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 evei-y 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 different shell from the one sup- 

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

 table Cardium ? 



C. L^viGATUM. Buc. ovatum, striis Iseviusculis longitudinalibus. 



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

 the C. Icevigatum of the ' Systema.' 



C. SERRATUM. Buc. Ovale Iseve, antice serratum. 



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

 and " parvi " were subsequent to the MS. 



C. TRISTE. Buc. ovatum laeve, 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 probabihty, 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 bullatus, for a more 

 detailed account of which the reader was referred to the ' Museum Ulricae.' 

 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. subrotundum, antice crenato-bians. 



Rump. 143. t. A4. f. N. Pecten bullatus. 



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. 



