APPENDIX, 839 



species have been described by Reeve (Z. P. 1844), and figured in his 

 ' Conchologia Jconica.' 



My odor a brevis (p. 24, as Anatina b.), t. 10, f. 13 ... M. ovalis 

 (p. 25, as Anatina o.), t. 9, f. 53 ... A. Pandoriformis (p. 25, as Ana- 

 tina P.), t. 10, f. 9 ... M. crassa (p. 25, as Anatina c), t. 10, f. 6 ... 

 M. striata (p. 50, as Pandora s.), t. 12, f. ]2. 



There can be little doubt, likewise, that A. globulosa (p. 20) and 

 A. globosa (p. 23) are generically distinct (Tugonia, Gray), from such 

 typical Anatina as our three first species ; A. prcetenuis (p. 23) and 

 A. Leana (p. 24) have been separated by some, as Cochlodesm^e, 

 but by others have been placed in Periploma. 



Anatina truncata, p. 20, t. 11, f. 24 ... A. elliptica, p. 23, t. 9, 

 f. 46 ... A. papyracea, p. 23, t. 10. f. 12 ... A. Leana, p. 24, t. 9, 

 f. 33 ... A. elongata, p. 24, t. 10, f. 15. 



Periploma trapezoides (p. 20, as Anatina t.), t. 10, f. 32 ... P. ar- 

 gentaria, p. 21, t. 10, f. 11 ... P. planiuscula, p. 21, t. 10, f. 33. 



Periploma obtusa (t. 13, f. 50), Hani, in List of Illustrations to 

 Lamarck's Shells (1842), t. 2, f. 50. Very obtusely trapeziform, out- 

 line totally devoid of angularities, very inequivalve, very fragile, dull 

 yellowish white ; very inequilateral, the sides rounded, edge of the 

 longer posterior one obliquely and continuously united to the sub- 

 arcuated ventral margin ; anterior side very short, roughened by 

 minute punctures, and very much narrowed by the sudden declivity 

 of the dorsal edge ; anterior slope with minute crowded concentric 

 wrinkles, bounded posteriorly in the more convex valve by a slightly 

 impressed radiating hollow. l-f-...l-$.. W. America. 



Thracia plicata, p. 21, t. 10, f. 37 ... T. phaseolina, p. 22, t. 10, 

 f. 35 (as declivis) ... T. similis, p. 22, t. 9, f. 52 ... T. Conradi, p. 22, 

 t. 10, f. 34 ... T. Corbuloides, p. 22, t. 9, f. 20 ... T. curta, p. 22, 

 t. 10, f. 1 ... T.rupicola (as Corbula, p. 47, t. 11, f. 32). l 



Lyonsia (as Osteodoma, a misprint) hyalina, p. 24, t 10, f. 10 ... 

 L. coruscans, Scacchi (p. 25, as O. elongata), t. 13, f. 27 ... L. (p. 25, 

 as O.) cuneata, t. 10, f. 14. 



Lutraria elongata, p. 27, t. 10, f. 26 ... L. Tellinoides, p. 27, t. 11, 

 f. 33 ... L. Cottardi, p. 28, t. 9, f. 56. 



On Lutraria (p. 26). Consult Reeve's monograph in his ' Con- 

 chologia Iconica,' and see, too, Proc. Bost. iii. and Zeit. Mai. 1849, 

 1851. Examine, also, Lavignon Petitiana and Lavalleana of D'Or- 

 bigny's Cuba Shells. Many of our species might with equal (or 



1 Anatina distorta, p. 23, must, likewise, be included in this 

 genus, and, perchance, in this species. 



