SPURIOUS SCAPHOPODA : SERPULIDiE. 245 



out an inserted apical tube. We do not hesitate to refer it to the 

 Serpididce. See pi. 37, fig. 12, H. onyx Mort, Alabama. 



The genus Falcula of Conrad was based upon internal casts of 

 Hamulus. Type F. falcata Conr., pi. 37, figs. 10, 11, from the 

 Lower Green Marls at Crosswicks, N. J. 



Hamulus onyx Morton, I. c, pi. 2, f 8 (Lynch 's Creek, S. C.) ; pi. 

 16, f. 5 (Erie, Ala.), is the type of the genus. 



Hamulus squamosus Gabb, Journ. A. N. S. P. (2), iv, p. 398, 

 pi. 68, f. 45. 



Hamulus major Gabb, t. c, p. 399, pi. 68, f 46, Ripley Group, 

 Eufaula, Alabama. 



Hamulus falcatus Conrad, Araer. Journ. Conch., v, p. 44, pi. 

 1, f 12, 16 (as Dentaliumfaleatum), including D.f hamatus Com:, 

 Amer. Journ. Conch., vi, p. 77, from the New Jersey Cretaceous, 

 described from internal casts, by which it is still solely known. 



It scarcely falls within the province of this work to enumerate 

 the European and Indian species of similar forms, except when 

 described as Dentalium. 



Dentalium octocostafum Frass, 1867. Jahresh. Nat. Kund. 

 Wuerttemberg, Vol. 23. p. 239, pi. iv, fig. 13. 



Cretaceous at Marsaha, Palestine. 



Genus Pyrgopolon Montfort, 1810. 



Pygopolon Montf., Conch. Syst., i, p. 394 (1810), type P. mosce 

 Montf. — Entalium Defrance, Diet. Sci. Nat., xiv, p. 517 (1819), 

 type E. rugosum Defr. — " Entale Defrance " Blainv., Man. de 

 Maiac, p. 628 (1825), type D. duplicatum. — " Entalis Defr.," 

 SowERBY, A Couchol. Man., p. 42 (1839), type D. duplicatum 

 Blainv. — P/iareiriw?/i,KoENiG, IconesFossilium Seciles, p. 4 (1825). 



Shell club-shaped, straight, or curved toward the apex, the out- 

 side bevelled (as though constricted, but the lumen does not con- 

 tract) at the oral aperture ; dull, chalky, with irregular encircling 

 undulations ; the inner layer generally projecting as a tube at the 

 apex. 



Type P. mosce Montf, pi. 37, fig. 13 ; see also P. elava Lam., pi. 

 37, figs. 14, 15. 



Upper Cretaceous, especially at Maestricht in the Netherlands. 



Blamville, as was his custom, used Defrance's French vernacular 

 name " Entale " instead of his Latin form, and for some occult rea- 

 son he changes the name of the species. Sowerby's variation was 



