80 SPECIES OF THE SYSTEMA. 
subsequently regarded by himself as the young of edentula, is 
an immature example of the Lucina ovum of Reeve’s Mono- 
graph (Conch. Icon. vol. vi. Luc. pl. 5, f. 21). The “rugosa” 
and the ‘“‘ Ani vestigium ovato-acutum valde excavatwm angulo 
acuto” (M. U.) militate against the typical value of the ex- 
ample. The only manuscript addition is “int.” for ‘ margine 
integerrimo.” 
Penns literata, 
The V. literata, as it appeared in the tenth edition of the 
‘Systema,’ was an easily recognisable species. Excluding from 
the synonyms all such shells as are opposed in character to the 
diagnosis, for instance, Bonanni’s figure, called smooth in the 
text, and delineated as rounded at both ends, and the E and 
smaller F of Gualtier’s plate, which seem intended for textile, 
a shell which is neither striated nor angulated, there remains a 
correct enough synonymy, which both harmonises with and 
further defines the too succinct description. Hence naturalists 
have easily recognised as the type of the species the Tapes lite- 
rata (Knorr, Délices Yeux, pt. 1, pl. 6, f. 4), and the more readily 
so from the name itself being derived from Rumphius and 
Argenville, whose figures undeniably exhibit, however rudely, 
that well-known shell. The erroneous European locality pro- 
bably originated from a belief that the T’apes geographica and 
pullastra were only its dwarf varieties. All the species here 
mentioned are to be found in the Linnean cabinet, but none 
(except geographica, which is queried for 124) were found 
written on or in a marked receptacle. “ List.-t. 402” is cited 
in the MS. of Linnets; “ Knorr, 1, t. 6, f. 4” in that of his 
son: both corroborate the established identification. ‘ Int.” 
for “ margine integerrimo” is likewise appended. 
Vents rotundata. 
The Tapes (Venus) papilionacea has been suggested as the 
representative of this species; an hypothesis negatived by the 
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