244 SPURIOUS SCAPHOPODA : SERPULIDJE. 



Dentalium septemcostatum Abich in Trautschold, 1859. Bull. 

 Soc. Nat. Moscou, xxxii, pt. i, p. 314, pi. 6, fig. 5. Eocene and 

 Oligocene, Armenia. Probably = " Serpula " heptagona Sowerby, 

 with which Trautschold, Bull. Soc. Nat. Mosc., 1868, pt. 1, p. 168, 

 identifies it. 



D. serratum Pictet et Roux, 1849. Mem. Soc. Hist. Nat. de 

 Geneve, 1849, Vol. 12, p. 150, pi. 27, f. 12 a-b. Cretaceous, Mouths 

 of the Rhone, France. Probably belongs to Hamulus. 



Dentalium sexcarinatum Goldfuss, 1844. Petrifac. German., Vol. 

 Hi, p. 4, pi. 166, fig. 12. 



Dentalium sexradiatum Goldfuss. " Craie super. Maestricht." We 

 have seen no work in which this species is described. It may be 

 an error for sexcarinatum. 



Dentalium sowerbyi Michelotti, 1847. Terr. Mioc. de Ital. Sep- 

 tentr., p. 145, 1847. 



Dentalium strangulatum Deshayes, Mem. Soc. d'Hist. Nat. de 

 Paris, ii, p. 382, pi. 16, f. 28 (1825). 



Dentalium strangulosum " Deshayes," Gumbel, 1861 (misspelling 

 for D. strangulatum Deshayes). Giimbel, Geognos. Beschreib. 

 Bauerisch. Alpengebirg., p. 604. 



Dentalium subearinatum MUNSTER in Goldfuss. Quoted by 

 Ryckholt, Mem. Couron. Belg., 1850-51, Vol. xxiv. This may be 

 a misspelling for D. sexcarinatum Miinster in Goldfuss, 1844. 



Dentalium subulatum Desh., Mem. Soc. d'Hist. Nat. Paris, ii, p. 

 373, pi. 16, f. 29 (1825). 



Dentalium undatum Defrance, 1819. Diet. Sci. Nat., Vol. xiii, p. 

 72. Near Angers (=Ditrupa). 



Genus HAMULUS Morton, 1834. 



Hamulus MORT., Synopsis Organic Remains of the Cretaceous 

 Group of the U. S., p. 73, type H. onyx Mort. Falcula CONRAD, 

 Amer. Journ. Conch., vi, July, 1870, p. 77, type Z>. hamatus Con., 

 1870, error for D. falcatum Con., 1869. 



Shell tubular as in Dentalium, but very much and progressively 

 more curved toward the smaller end ; exterior coarsely and rudely 

 ribbed longitudinally ; aperture contracted, circular, smaller orifice 

 simple, without an accessory tube. Type H. onyx Mort. 



Cretaceous of the United States, Europe and India. 



This genus is like Pyrgopolon in the contracted aperture and 

 rude, irregular growth, but it is more curved and apparently with- 



