480 CEETACEOUS PELECYPODA 



ADDITIONS AND CORRECTIONS. 



Family, — Fuolabidm. Snh-famUij, — teredinje. 



On page 14, after No. 8, add — 



9, Lyrodus, Gould, 1870, (Invert, of Massacli., 2nd edition, p. 31). This 

 name has been suggested for a small species. Teredo chlorollca, the palettes of 

 which are elongated, with the basal portion thin, flexuous, the upper "lyre-shaped," 

 the extreme two-thu-ds of their length being " covered with a dark crust which 

 has a projecting horn at each angle." The form of these palettes very closely 

 resembles that of Nausitoria, when the tip is broken away. It is not improbable 

 that both belong to one and the same genus. 

 On page 31, line 9 from top, for "Pig. 12," read Pig. 11. 



Family, — IIyidm. Snh-family, — coeb ulinm. 



On page 35, before "4. Euclmris, Eeeluz," &c., add — 



3rt. Tceniodon, Dunker, 1851, (Paltcontographica, by Dunker and H. von 

 Meyer). Shell ovately elongated, sub-equilateral, smooth, equivalve, and appa- 

 rently closed, right valve with a cardinal tooth under the umbo extending forwards, 

 left valve with a distinct marginal cartilage pit behind the beak ; type, T. elliptici'.s, 

 from liassic beds near Halberstadt (Germany). Dunker says, that the ligament 

 was partially external, partially internal, and that the valves are not gaping. So 

 far, this character wou.ld agree with Eiicharis, but the hinge appears to be different ; 

 muscular and pallial impressions have not been observed. The genus is evidently 

 closely allied to Corhula, and still more so to Queustedtla, but unless the last named 

 genus and Fitcharis be better characterized, it will not be possible to form a correct 

 idea of their affinities to Tceniodon. 



On page 39, before "Sub-family, — myis-^," add — 



14. Dorsomya dorsata is figured by Eyckholt as an apparently new genus 

 from the carboniferous beds of Belgium. The figure represents a cast of an elon- 

 gately ovate shell, with a convex dorsal and slightly flexuous ventral margin, veiy 

 inequilateral, the small beaks being almost anterior, two small ovoid muscular scars, 

 one placed quite at the anterior end, the other near the posterior dorsal margin ; 

 pallial line in the upper posterior part with an almost horizontal, deep, uaiTow 

 sinus. The shell resembles Corbulomya in shape, but the knowledge of the hin^o 

 is essential for its correct generic determination, (vide Eyckholt, Melanges 

 Paldont., 1852, p. 17, pi. ;x, fig. 20, in Mem., Com-. Acad. Belgique, vol. xxiv). 



