16 PROCEEDINGS OF THE NATIONAL MUSEUM vol.76 



This is a well known Teritary species and, as far as I know, has not 

 been described from the American Cretaceous. It is not common in 

 this material but is well preserved when found. Its large size and 

 white porcellaneous tube cause it to stand out in the matrix. 



Plesiotyye.—Q^i. No. 73693, U.S.N.M. 



Genus SPIROLOCULINA d'Orbigny, 1826 



SPIROLOCULINA CRETACEA Reuss 



Plate 2, Figure 6. 



Spiroloculina cretacea Reuss, Ostalpen 72, vol. 26, p. 9. — Egger, Abh. cl. 

 II. Cl. d. k. Akad. d. Wiss. XXI, vol. 1, Abth. 1902, p. 21, pi. 1, figs. 22-24.— 

 Franke, Abh. geol.-paleon. Inst. Univ. Greifswald, vol. 6, 1925, p. 9. pi. 1, 

 fig. 9. 



Test in side view elliptical, in end view the sides are nearly paral- 

 lel, the periphery flattened; chambers numerous; the periphery and 

 inner margins of the chambers slightly raised, apertural end of the 

 chamber forms a slight neck ; lip slightly developed ; aperture nearly 

 circular, tooth either undeveloped or else broken off in all speci- 

 mens, wall smooth, dull. 



Length, 0.59 mm., width, 0.39 mm. 



This form, which is represented here by one specimen, has only 

 been reported from the Cretaceous. It is extremely rare and al- 

 though there are a few apparent fragments of it in the material 

 they are all so delicate that they could not be saved. It has not been 

 previously reported from the Cretaceous of the United States, only 

 from Europe. 



Plesiotype.— Cat. No. 73694, U.S.N.M. 



Genus QUINQUELOCULINA d'Orbigny, 1826 



QUINQUELOCULINA SEMINULUM (Linnaeus) 



Plate 2, Figures 11, 12 



Serpula seminulum Linnaeus, Syst. Nat., ed. 12, 1767, p. 1264, No. 791. 

 Miliolina seminulum H. B. Brady, Rep. Voy. ChaUenger, Zoology, vol. 9, 



1884, p. 157, pi. 5, figs. 6 a-H?. 

 QuinquelOGulina seminulum Cusiiman, Foram. N. Pacific Ocean, U. S. 



Nat. Mus. Bull. 71, pt. 6, 1917, p. 44, pi. 11, fig. 2 ; text fig. 29. 



Test free, elongate, about twice as long as broad, smooth, periph- 

 eral margin acute, almost carnate, sutures distinct, apertural end 

 raised in a straight neck, aperture broadly oval; there is no tooth 

 apparent. 



Length, 0.57 mm. 



This species has a very mixed synonymy and is usually used to in- 

 clude all the smooth forms of the genera. I have used it in the same 



