MR. S. HANLEY ON THE LINNEAN MS. OF THE ' MUSEUM ULRICA.' 49 



C. COSTATUM. Buc. sulcis costis elevatis membranaceis. 



The original description has been somewhat enlarged in the press, by the 

 addition of " brevissimis," " et extrorsum flexis," " fossula distinctus ; at 

 vero ille sub ano quasi duplex " : " minus vero ad latera sulcata," moreover, 

 was simply " ad alterum latus " : the only expression omitted in printing 

 was "reflexus," which followed "Anus margine." 



C. Cardissa. Buc. compressum, valvis carinatis, natibus contiguis. 



" Colura. Aqu. 19. t. 16 " (cited also in the ' Systema') was quoted in 

 the MS. from which the " vix," " subcontigui," " remotus, validus, fossula 

 distinctus," were absent. The"Rima" was termed " subrotunda " in- 

 stead of " cordata." 



C. HEMicARDiuM. Bmc. subquadrilatcrum : valvulis carinatis, umlwni- 

 bus distantibus. 



" Fasciis " was a misprint for the original " facies " : " sulcis convexis " 

 was written "sulcis excavato-rugosis." There was no specific appel- 

 lation. 



C. MEDIUM. Buc. subcordatum subangulatum ; valvulis angulatis sul- 

 catis laevibus. 



The prefatory remarks were the only portion of the printed description 

 to be found in the MS. The species was not named, but was quoted in 

 the ' Systema ' before the publication of its details. 



C. ACULEATUM (misprinted " muricatum "). Buc. subcordatum, sulcis 

 convexis, linea cava exaratis, versus apicem dentatis. 



The intended name was verum. 



C. ECHiNATUM. Buc. subcordatum, sulcis acutis exaratis linea elevata 

 ciliata aculeis inflexis plurimis. 



" List. Aug, 188. t. 5. f. 33, Pectunculus echinatus," " Bonan. 2. t. 90," 

 « Gesn. Aq. 131, 132," " Faun. Suec. 1339," " Rondel. Aq. 22," were the 

 ori;i;inal synonyms, to which our author had subsequently added " Klein, 

 139. t. 10. f. 40." " Alba " followed " gibba " ; " parum antrorsum in- 

 flexis " was the reading for the printed " erectis subulatis " ; " extrorsum " 

 for the " uti extus " : " brevioribus. Anus Isevis, sutura simplici prominula," 

 " recurvi," " fossula distinctus," were emendations. 



C. TUBERCULATUM. Buc. subcordatum, sulcis obtusis nodosis trans- 

 versim striatis. 



" Gualt. t. 71- f- M. " was a correct additional synonym. 



C isocARDiA. Buc. cordatum, sulcis imbricatis squamis fornicatis. 



" Klein, 138. isocardia fragum" had been interpolated by Linnaeus; 

 hence the name, which was not in the original. The " fossula distinct! " 

 has replaced the earlier " validi." 



C. FRAGUM. Buc. subcordatum subangulatum, sulcis notatis semicir- 

 culis elevatis. 



By the addition of " mala" to the erroneously cited figure of Gualtieri, 

 our author has virtually repudiated it. " Spinosa;" followed " Pruni ; " the 

 fallacious " s. rubris " was not present, nor " saepe " either; " anteriore " 

 stood in the place of" postico," and " postico" in that of " antico." The 



LINN. PROC. — ZOOLOGY. 4 



