MR. S. HANLEY ON THE LIKNEAN MS. OF THE ' MUSEUM VLUICM.' 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. 



" Colum. 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. Buc. subquadrilatcrum : valvulis carinatis, umboni- 

 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 

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

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

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

 for the ** uti extus " : " brevioribus. Anus laevis, 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 j 

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

 has replaced the earlier " validi." 



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

 culis elevatis. 



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

 our author has virtually repudiated it. " Spinosae " 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 



