TYPE SPECIMENS OF INVERTEBRATE FOSSILS. 215 



41807. Cytherella submarginata Ulrich. Holotype. 



Eocene. Upper Marlboro, Maryland. 



Ulrich, Maryland Geol. Surv'., Eocene, 1901, p. 118, pi. 16, figs. 

 14, 15- 



41808. 'Cytherella? subrotunda Ulrich. Holotype. 



Stones River (Ord.). Minneapolis, Minnesota. 



Ulrich, Geol. and Nat. Hist. Surv. Minn., Final Rept., Ill, Pt. 

 II, 1894, p. 685, pi. 44, fig. 43. 



35444. Cytheridea (?) chesapeakensis Ulrich and Bassler. 



Holotype. 

 Calvert (Miocene.) Plum Point, Maryland. 



Ulrich and Bassler, Maryland Geol. Surv., Miocene, 1904, p. ^125, 

 pi. 37, fig. 9. 



41804. Cytheridea perarcuata Ulrich. Holotype. 



Eocene. Potomac Park, Maryland. 



Ulrich, Maryland Geol. Surv., Eocene, 1901, p. 121, pi. 16, figs. 

 22, 23. 



35445. Cytheridea subovata Ulrich and Bassler. Cotypes. 



Calvert (Miocene). Plum Point, Maryland. 



Ulrich and Bassler, Maryland Geol. Surv., Miocene, 1904, p. 124 

 pi. 37, figs. 1-8. 



35446. Cytherideis ashermani Ulrich and Bassler. Cotypes. 



Calvert (Miocene). Plum Point, Maryland. 



Ulrich and Bassler, Maryland Geol. Surv., Miocene, 1904, p. 126, 

 pi. 37, figs. 10-16. 



35447. Cytherideis cylindrica Ulrich and Bassler. Holotype. 



Calvert (Miocene). Plum Point, Maryland. 



Ulrich and Bassler, Maryland Geol. Surv., Miocene, 1904, p. 126, 

 pi. 37, fig. 17. 



35448. Cytherideis longula Ulrich and Bassler. Cotypes. 



Calvert (Miocene). Plum Point, Maryland. 



Ulrich and Bassler, Maryland Geol. Surv., Miocene, 1904, p. 12S, 

 pi. 37, figs. 21-27. 



35449. Cytherideis semicircularis Ulrich and Bassler. Cotypes. 



Calvert (Miocene). Plum Point, Maryland. 



Ulrich and Bassler, Maryland Geol. Surv., Miocene, 1904, p. 127, 

 pi. 37, figs. 18-20. 



35450. Cytherideis subaequalis Ulrich and Bassler. Holotype. 



Calvert (Miocene). Plum Point, Maryland. 



Ulrich and Bassler, Maryland Geol. Surv., Miocene, 1904, p. 127, 

 pi. 37, fig. 28. 



35443. Cytheropteron nodosum Ulrich and Bassler. Holotype. 



Chesapeake (Miocene). James River, Virginia. 



Ulrich and Bassler, Maryland Geol. Surv., Miocene, 1904, p. 129, 

 pi. 38, figs. 37-40. 



