728 APPENDIX IL 
whorls contracted or narrow towards the suture. The specimens are fragments of casts. 
The lip does not appear to have been greatly expanded.—Plate 19, fig. 12, natural size. 
Astoria, Oregon. 
CrRITHIUM MEDIALE (Conrad).—Turreted, with fine acute revolving lines; whorls 
angulated in the middle, and having a row of tubercles on the angle; suture impressed ; 
whorls contracted beneath the suture.—Plate 20, fig. 1, natural size ; 1 a, cast. 
Astoria, Oregon. 
Buccinum ? pEvinctum (Conrad).—Elevated, with numerous wrinkled revolving 
lines ; whorls flattened and sloping above. . Middle of revolutions of the spire nodulous. 
Margin of the labrum profoundly arcuate.—Plate 20, figs. 2, 2 a, natural size. 
Astoria, Oregon, 
Fusus cenrcutus (Conrad).—Fusiform, with closely arranged revolving lines, alter- 
nate in size. Whorls of the spire angulated below the middle, and with longitudinal 
ribs on the inferior half. Body whorl with short ribs on the angle, and beneath, the re- 
volving lines are larger and more prominent than above.—Plate 20, fig. 3. 
Fusus corputentes (Conrad).—Fusiform. Body whorl ventricose, suddenly con- 
tracted at base, flattened and sloping towards the suture; whorls of the spire angulated 
and nodulous in the middle, flat and sloping above.—Plate 20, fig. 4, cast, natural sizee 
NavuriLus ancustatus (Conrad).—Compressed. Septa sinuous and profoundly angu- 
lated towards the periphery; from the angle the outer margin of the septa is parallel 
with the periphery, and anteriorly suddenly becomes transverse across the margin or 
periphery.—Plate 20, figs. 5, 6, natural size. 
Astoria, Oregon. 
[The largest specimen of this species in the collections is 9 inches in diameter. ] 
TeREDO suBSTRIATA.—Nearly straight and evenly cylindrical, very slightly tapering. 
Surface minutely and very neatly striate longitudinally.—Plate 20, figs. 7, 7 a, 6, natural 
size. 
Astoria, Oregon. 
Norr.—The figures from 8 to 13 inclusive, on Plate 20, representing species from 
Astoria, are given of natural size, without names. 
Figure 8 is an external cast ; and fig. 8 a, an internal cast. 
Figure 9, is an external cast. 
Figures 10, 11 are external casts; 10 a, 11 a, are internal casts. 
Figures 12, 18, species of Turritella, natural size. 
Figure 1, plate 21, an imperfect cast. 
