162 CRETACEOUS PELECYPODA 



throun-h the kindness of Dr. Bosquet. Tlic Imiiilar tooth in the riglit and the corresponding pit in 

 the left valve are very distinct. In the latter the two anterior eardiiiala are very close together, as in 

 Cj/primeria; the posterior is also deeply grooved; in the right the middle cardinal is by far the 

 thickest; the two others thin, and especially so the posterior ; the palliul sinus is deep, somewhat 

 ascending and sharply angular at the end ; the convexity of the shell is slightly greater than could 

 be supposed from Goldf uss' figure. 



58_ f.sul-fahay d'Orb. (T. /«ia, Goldf.). Goldfuss' figure represents a shell slightly more 



attenuated posteriorly than that figured by Sowerby, but I do not know whether there is sufficient 

 reason for a specific distinction. Sowerby's faba, I suspect, is a Cyprimerla. V. fahacea of 

 Romer which Miiller identifies with it is, however, evidently quite a diCFerent shell. 



59. Y, elliptica, Romer. If it be the same as, or allied to, V. fragUis, d'Orb., it belongs to 



the new genus Baroda. 



60.— r. Goldfussi, Gein., (V. parva, Goldf. = V. sitb-parva, d'Orb.). Goldfuss' figure 

 resembles a cast of Miiller's V. tum'ula, which is a small Carijatis, but Geinitz' representations and 

 descriptions (Char. p. 76, pi. xx, figs. 6-7,) would rather indicate an Eripliijla with an excavated 



lunula. 



61-63. Y. havanca, parallela, and gibhosa of Miinster are all doubtful; the first could belong 



to Eriphyla and the third to Ci/therea. Schaf hreutl, (Siid-Bayerns Leth. Geog., 1863, p. 170, pi. xliii, 

 fio-. 7,) calls a cast specimen V. gibhosa, Miinst. ; it certainly very little agrees with the original 

 figure in Goldfuss' " Petrsef. Germanite," and may be a different shell altogether. 



64. Y. sub-decussata, Romer. Judging from external appearance only, no reasonable objection 



could be raised as to this species belonging to the sub-genus Ami/gdala of Tapes, but Niiculce 

 when devoid of the upper layer of the shell often show similar radiating ribbings or stria. 



65. Y. concentrica, Rom., {V. siib-concentrica , d'Orb.) ; this could be a Ci/primeria. 



66. — Y. lala, Rom., most likely a Cijtlierea, or perhaps belonging to the sub-genus Mercenana. 



67. F. fabacea. Rum. Miiller, as already stated, and apparently also Bosquet, unite this 



■with d'Orbigny's V. sub-faba (/aba, Goldf.). 



68. — V. laminosa, Rss., (snb-laminosa, d'Orb.,) appears to be an Fji-iphyla , if it be not 

 a Luciiia. 



69. — Y. (Cijilierea) elongata, Rss., (sub-elongata, d'Orb.), has, if not by accidental pressure, 

 a peculiar form which greatly recalls some recent species of Tapes. 



70. — V. tum'ula, Miill. The right valve of which I have examined the hinge shows that the 

 species is most probably a Cyprimerla. There are two widely diverging bifid teeth pretty distinctly 

 visible. The shell is generally more uniformly convex than shown in IMiiller's figures. 



71. — Yenns? exuia, Nillson, (Petrif. Suecana, &c., 1827, p. 17, pi. iii, fig. 16). I do not 

 know a single species of Yenerid.e with which this shell could be compared. It is oblong, 

 inequilateral, with pointed beaks, with a few concentric strife and numerous fine radiating ribs 

 on the posterior side. It could be a species of Psammocola, or Psammobella, or perhaps a Linearia 

 of the Telllvid^e, but I do not know any others, unless the shell is referable to Aiiatina or 

 Thracia. Nillson apparently makes it the type of his Yennliihes, under which name he means 

 to include the cretaceous representants of Linne's Venus. 



72. — Y. MatJteroni, Zitt., is a species of Cy^^^rea, belonging to the section which Conrad 

 called Bosiniopsis (see p. 151). '. 



73.74.. — Ci/lJierea Ilurnesi and polijmorpha, Zittel, belong to the sub-genus Curj/aiis. 

 75.76. — Yeiuts pr'uiKCva, (Cyclhia id., Zittel), and F. cretaceu (Losinia id. Zittel), belong to 

 Cj/primeria. 



77. — r. eximia, (Tapes id., Zittel,) is a typical species of the new genus Baroda. 



