PRINCIPAL ABBREVIATIONS. 
Adams (or Adams and Reeve), Samar. Adams and Reeve in the 
Zoology of H.M.S. Samarang. Mollusca; p. 1 to 24 in 1848; 
p: 25 to 44 in 1850; p. 45 to 88 in 1850. 
Adams, Shells Pan. Adams’ Catalogue of Shells collected at 
Panama, 1852 (from An. Lyceum, N. Y. vol. v.) 
Adans. (or Adan.) Seneg. Adanson’s Histoire Naturelle du Sénegal, 
1757. 
Alder, and Alder, Cat. Sup. Alder in the Transactions of the 
Natural H. Soe. of Northumberland, vols. i. ii. 
Am. Mar. C. = Conr. Am. Mar. C. 
Am. Ph. Tr. or Am. Tr. Transactions of the American Philo- 
sophical Society, n. s. vols. iv. to x. 
An. before a species signifies perhaps, or possibly. 
‘Ann. (or An.) du Mus. Annales du Museum d'Histoire Naturelle. 
Annals (or Ann.) Lyceum N. H. (or Y. or York). Annuals of the 
Lyceum of Natural History of New York. 
Annals (or An.) Nat. (or N.) Hist. (or H.) Annals of Natural 
History. 
Ann. (or An.) Phil. (or Ph.) Annals of Philosophy. Vol. xxv. 
(= n. 8. ix.) is chiefly referred to (1825). 
Ann. (or An.) Se. Nat. Annales des Sciences Naturelles. Series 1, 2. 
Archiv. de Musée. Archives du Museum d'Histoire Naturelle. 
From 1840. 
Arg. or Argenville. Argenville’s Conchyliologie, 1757. 
Ast. = Quoy, Ast. 
B, Born, or Born, Mus. Cas. Born’s Testacea Musei Cesarei 
Vindobonensis, 1780. His Index Musei, &c. in 1788. 
Barnes. Barnes in Silliman’s Journal of Science, vols. vi. vii. xiii. 
Bean. Bean in the Magazine of Natural History, vols. vi. viii.; also 
in British Marine Conchology. 
