10 
base not at all spread but quite cylindrical, with a 
central perforation, which sumetimes goes quite 
through, mouth often turning a little upwards, ex- 
actly circular, not thinner than the rest of the shell, 
but appearing as if regularly cut off, with the whorls 
rising one upon the other. 12. on Fuci and Sertularia, 
Weymouth, §c. 
S. GRANULATA.—SERPULA. G. Lin. 1266.—D. p. 
1074.—Mont. p. 500.—Don. ¢. 100.—Turt. D. p. 
150.—Lin. T. 8. p. 241.—SeEr Sutroata. Lin. T. 3. 
p. 254.—Opaque, white, with two volutions, deeply 
grooved longitudinally or in a spiral direction, and 
transversely wrinkled, especially in the furrows, aper- 
ture round. 4%. Milton, &c. tolerably common. 
S. HETEROSTROPHA.—SERPULA. H. Mont. p. 502, 
Lin. T. 8. p. 242.—D. p. 1078.—Turt. D. p. 151. 
—Strong, spiral, dull dirty white, with two or three 
reversed volutions placed laterally, furnished with lon- 
gitudinal ridges, one along the back, and another on 
each side, rough, wrinkled transversely ; base flat and 
somewhat spreading; aperture orbicular and invariably 
placed opposite the suns apparent motion. 0,076. Not 
uncommon, Kingsbridge bay, Sc. 
S. Cartnata. Serputa. C. Mont. p. 502.—Lin. 
T.8. p. 242,—D.p. 1074.-~ Turt. D. p. 151.—Dull, 
