BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND 13. AFU. IV. N:0 5. 17 



These tliree records of the preparatorv conchological stu- 

 dies of LiNNiEus: the Lectures of 1752, tlic pencil-uotes to 

 RuMPHius, and the Hanley MS, deserve to be compared to- 

 gether and eonsldered with regard to the origin and progress 

 of the chapter on the Testacea in the Museum Ludovica? 

 Ulrica?. 



It has been remarked above that when lecturing on the 

 Insecta in 1755 Linx/Ecs confiued himself almost totallv to 

 species indigenous to Sweden, as these aftorded him all he 

 wanted to demonstrate the weuera. The same method could 

 not be followed with regard to the Testacea, their genera being 

 for the most part founded wpon exotic forms. It will be seen, 

 ho"\vever, that he took care, bv allowing himself occasional 

 deviations in the disposition and manner of treating of certain 

 genera, to give bis hearers some idea of the groups of Mol- 

 lusks then known to him as Swedish, and that, consequently, 

 the order of their sequence is not so entirely fortuitous as 

 raight be supposed from these Avords in the introduction : »that 

 the genera are not placed in the same order as in the Systema 

 Natiu-je is not becaiise of any change of system, but merely 

 because they were taken as they were at hand». Sueh as they 

 are, their constitution as well as their appellations give them 

 a rather primitive and preliminarv character. They foUow 

 here, in the order of the Lectures, with notices of the com- 

 ments dictated bv LiXNiEUS on most of them. 



I. Cochlese. 



Cypr.ea. From the S. N. ed. pr., 1735. Thirty one species. 

 The first is »C. gibbosa, for it is as it were humpbacked. It 

 may be called: C. subturbinata gibba, atropurpurea, maculis 

 pallidis. Not fouud in auv aiithor.-) It seems to havc been 

 dropped afterwards. It is followed by thirty species very 

 nearly in the same order as in the äI. L. U. and the S. N. 

 ed. 10, cnding with C. globulus. Of the lirst 2o the eleven 

 species numbered iu the pencil-notes: 1, 2. o, 4, (3, 7. 11, 12, 

 13, 14, 16, 23, are the species identically marked in the Lec- 

 tures. 



]>ULLA. Xovum gcnuji . Eight species, tlic tirst six of 

 the M. L. U., with Murex ticus and ]\1. rapa. Th(> numbera 



