PLATE XIII. 
Loxonema subattenuat^. 
Page 40. 
Fig. 1. An internal cast, consisting of three volutions, but showing no traces of surface characters, 
Fig. 2. A similar specimen, consisting of five volutions. 
Fig. 3. A similar but larger individual, retaining about five and a half volutions and somewhat compressed. 
Loxonema robttsta. 
Page 40. 
Fig. 4. One of the specimens used in the original description. The opposite side (not figured) shows the 
characteristic markings of the genus Loxonema faintly traceable on the two lower volutions: 
those on the larger volution are strong, three of them occupying the space of more than an 
eighth of an inch. 
Fig. 5. A larg-er individual, showing the form, but somewhat compressed. Schoharie, N. Y. 
Fig. 6. An imperfect internal cast of this species. Clarence Hollow, N. Y. 
Loxonema ? coapta. 
Page 44. 
Fig. 7. An imperfect specimen, in limestone of the Hamilton shales, at Eighteen-Mile creek, Lake Erie shore. 
Loxonema solida. 
Page 41. 
Figs. 8, 9. The typical specimens from which the original description was drawn. They are internal casts, 
and show no evidence of surface-markings. 
Loxonema? teres. 
Page 42. 
Fig. 10. A cast of the species in limestone, with no defined surface-markings; but the form of the volutions, 
and the absence of any indication of a revolving band, show its relations with Loxonema. 
Loxonema pexata. 
Page 42, 
Figs. 11, 12. Internal casts of two specimens, which show no external markings; probably of this species. 
Stafford, Genesee county, N. Y. 
Loxonema pexata var. obsoleta. 
Page 43. 
Fig. 13. The lower volutions, showing the form and the surface-markings, which are more arcuate than 
represented in the drawing. 
Fig. 14. The typical specimen. 
Loxonema hydrablica. 
Page 44. 
