GASTROPODA (PECTINIBRANCHIA) . 
Moll . 43 
CoLUMBELLIDiE. 
Tryon comprises in this family the genera Columbella , with many sub- 
genera, also Alcira (H. Ad.), Engina (Gray), Columbellina (Orb.), 
Ampliissa (Ad.), and the only fossil Columbellaria (Rolle) ; Manual of 
Conchology, v. pp. 100-103. 
Columbella. 176 species, distributed in the subgenera Columbella 
(restr.), Nitidella , Alia, Mitrella , Atilia , Anachis , Seminella, Mitropsis , 
Conidea , il/eta, and Strombina , described and figured ; «c£. Z. c. pp. 103-187, 
pis. xlii.-lx. 
Columbella tayloriana (Reeve) = albo-maculata (Angas), New South 
Wales; Brazier, P. Linn. Soc. N. S. W. viii. p. 228. 
Anachis ostreicola (Melvill) from Florida ; Dali, P. U. S. Nat. Mus. vi. 
p. 326. 
Astyris rosacea (Gould) var. from Labrador; K. Bush, P. U. S. Nat. 
Mus. vi. p. 241, pi. ix. fig. 6. 
Alcira elegans (H. Adams); Tryon, Manual of Conchology, v. p. 188, 
pi. lxi. fig. 3. 
Columbellina (Orb.). To this genus, founded on a fossil species, Tryon 
refers also 0. harpiformis (Sow.), uncinata (Sow.), and cithara (Reeve); 
l. c. pp. 196 & 197, pi. lxiii. figs. 63-65. 
Amphissa (H. & A. Adams). 2 species ; id. 1. c. p. 197, pi. lxiii. figs. 66 
& 67. 
Engina (Gray). Monograph ; id. 1. c. pp. 188-196 (37 species figured on 
pis. lxi.-lxxiii.). 
MARGINELLIDjE. 
Marginella. Tryon, l. c. pp. 12-58, pis. v.-xiii., describes and figures 
190 species, distributing them into the following groups : — Typical Mar- 
ginella , Glabella , Prunum , Cryptospira, Volutella , Persicula , Gibberula, 
Closia, and Volvaria. 
Marginella impudica , sp. n., P. Fischer, J. de Conch, xxxi. p. 392, West 
coast of Sahara, 800-1139 metres. 
Erato. 18 species described and figured by Tryon, l. c. pp. 7-11, 
pi. iv. ; E. scabriuscula (Gra y), sulcifera (Gray), corrugata (Hinds), nana 
(Duclos), and schmeltziana (Dkr.), are placed by him in the subgenus 
Eratopsis (Hornos), founded originally for fossil species. 
CoNIDjE. 
Conus nodulosus (Sow.) from West Australia ; Cox, Abstract of P. 
Linn. Soc. N. S. W., Oct. 1883, p. iii. 
Pleurotomid^j. 
A number of known species from the Mediterranean photographically 
figured by Bucquoy, Dautzenberg, & Dollfus, Moll mar. du Roussillon, 
fasc. iii. pis. xiv. & xv. 
