APPENDIX. 
Species of Mazatlan shells wiil be found, from the Voyage 
of the Blossom, described in the “ Zoological Journal,” vol. iv., 
and in Dr. Gray’s “Zoology of Capt. Beechey’s Voyage.” Several 
appear in the various Monographs, and especially in the “ Pro- 
ceedings of the Zoological Society.” They will be seen tabulated 
in the Brit. Assoc. Rep. 1846, pp. 285 et seq. The following 
were described as new species by Philippi in the “Zeitschrift 
fiir Malacozoologie,” 1846, pp. 19—21, 51—55, and were brought 
from Mazatlan by a member of his family. 
1. Corbula alba, Phil. B. M. Cat. sp. P30. 
C. testa ovato-oblonga, tumida, equilatera, antice rotundata, 
postice acuta, subrostrata et utrinque carinata, lactea, sulcis 
tenuibus transversis cincta. Long. 6; alt. 33; crass. 33”. 
2. Tellina cicercula, Phil. . P66. 
T. testa ovato-elliptica, obliqua, latere postico longiore, an- 
gustiore, purpurascente ; striis perobliquis, fere perpendiculari- 
bus, antice obsoletis, postice semel fractis. Alt. 3°3; lone?e. 
3. Tellina lenticula, Phil. a 67. 
T. desta ovato-elliptica, obliqua, albida ; latere postico long- 
iore, angustiore ; strlis confertis, obliquis, regularibus, haud 
fractis. Alt. 34; long. 33; crass. 2”. 
4. Tellina dichotoma, Phil. 
T. testa ovata, alba; latere postico longiore, angustiore, 
acutiusculo ; striis obliquis, antice dichotomis, postice semel 
fractis. Alt.3; long. 3°3”. 
5. Tellina ervilia, Phil. 
T testa ovato-orbiculari, subaequilatera, postice acutiuscula, 
alba; striis tenuibus, antice haud flexuosis, nostice semel fractis. 
Alt. 32; long. 33; crass. 2”. 
6. Diplodonta obliqua, Phil. = 151. 
D. testa ovata, altiore quam longa, perobliqua, laevi, solidius- 
eula, alba. Alt. obliqua 33 ; long. 32; crass. 24): 
4, Lucina cancellaris, Phil. -f 143. 
L. testa parva, suborbiculari, subaequilatera, tumida, alba ; 
lineis elevatis radiantibus transversisque cancellata ; lunula 
excavata ; apicibus acutis uncinatis ; margine intus crenato. 
Alt. 2; long.2; crass. 13””. 
