INDEX, VOLUMES II TO XVII. 



311 



Dentalium (Bull. 1'Acad. Imp. Sci., St. Petersb. [5], vii, 1897, p. 

 214). 



DENTALIUM ALTERNANS Mull. (p. 224) is probably the same as 

 D. alternans Ryck. (p. 220). See Holzapfel, Palseontographica, 

 xxxiv, p. 178. As the name is preoccupied, D. confusum S. & P. 

 will replace it, D. muellerianum becoming a synonym. 



CADULUS OBRUTUS Conrad (p. 238). Add reference : Gadus 

 obrutus Conr., Amer. Journ. Conch., V, p. 227. 



Index to Families, Genera and Sub- 

 genera, Volumes II to XVII. 



[NOTE. The names of genera are printed in Roman type ; of 

 groups higher in rank in SMALL CAPITALS ; of synonyms in Italic.'] 



Abretia Ads., vii, 

 Acanthina Fisch., ii, 

 Acanthochcetes Auct., xv, 

 Acanthochetes Leach, xv, 

 Acanthochistes Costa, xv, 

 Acanthochites Risso, xv, 



ACANTHOCHITID^E Pils., XV, 



Aeanthochiton Herrm., xv, 

 Acanthopleura Gray, xiv, 

 A car do Lam., xvi, 

 Acera Auct., xv, 

 Acera Cuv., xvi, 

 Aceras Locard, xv, 

 Achates Gistel, ix, 

 Acicularia Monts., viii, 

 Aciculina Ads., iv, 

 Acieulina Dh., viii, . 

 Acinopsis Monts., ix, 

 Acinus Monts., ix, 

 Aciona Leach, ix, 

 Acirsa Morch, ix, 

 Aclesia Gray, xvi, 

 Aclesia Rari, xvi, 

 Aclisina de Kon., ix, . 



