8 PROCEEDINGS OF THE NATIONAL. MUSEUM tol. 67 



Occurrence. — Lower Cretaceous (Aptian) : Faringdon, England. 

 Geological distribution. — Lower Cretaceous (Aptian) : Les Croutes, 

 Gurgy, France (D'Orbigny). 



Plesiotype.—C?it. No. 69836, U.S.N.M. 



PROBOSCINA VIRGULA D'Orbigny, 1853 



Plate 27, figs. 9, 10 



1853. Reptotubigera virgula D'Orbigny, Pal^ontologie frangaise. Terrain Cre- 

 tac^, vol. 5, p. 753, pi. 631, figs. 15-17. 



Measurements. — Diameter of orifice, 0.06 mm.; diameter of peri- 

 stome, 0.08 mm. ; distance of orifices, 0.32-0.40 mm. The peristomes 

 are not grouped in bundles, and we are ignorant of D'Orbigny's rea- 

 son for classifying this species in his genus Reytotuhigera. 



Occurrence. — Lower Cretaceous (Aptian) : Faringdon, England. 



Geological distrihution. — Cenomanian: Le Mans (Sarthe), France. 



Plesiotype.— Cut. No. 69837, U.S.N.M. 



PROBOSCINA DEPRESSA D'Orbigny, 1853 



Plate 27, figs. 5, 6 



1853. Proboscina depressa D'Orbigny, Paldontologie frangaise. Terrain Cr^tacd, 

 vol. 5, p. 849, pi. 631, figs. 12-14. 



Measurements. — Diameter of orifice, 0.08 mm.; diameter of peri- 

 stome, 0.10-0.12 mm.; diameter of zooecium, 0.14 mm.; distance of 

 orifices, 0.48-0.60 mm. The fine specimen here figured incrusts a 

 sponge. It corresponds very well to D'Orbigny's description and 

 figure. 



The type preserved in the Museum of Paris is worn, according to 

 Pergens, 1889. With our new illustration we are able to maintain 

 D'Orbigny's species. 



Occurrence. — Lower Cretaceous (Aptian) : Faringdon, England. 



Geological distribution. — Lower Cretacous (Neocomian) : Vassy and 

 Nozeroy, France (D'Orbigny). 



Plesiotype.— Cat. No. 69843, U.S.N.M. 



PROBOSCINA COARCTATA, new species 



Plate 28, fig. 1 



Description. — The zoarium encrusts shells. It is formed of diverg- 

 ing, ramified fronds, each of which is claviform, much narrowed at 

 the base and contracted in its inferior third; the surface is covered 

 with large overlapping, concentric wrinkles. The tubes are invisible. 

 The peristomes are very salient, thin, and much scattered. 



Measurements. — Diameter of orifice, 0.035 mm.; diameter of peri- 

 stome, 0.08 mm.; distance of peristomes, 0.40-0.80 mm.; separation 

 of peristomes, 0.40 mm. The distance and separation of the peri- 



