1894.] new-Vork Microscopical society. 129 



graph oi Polymorphina) Trans. Linn. Soc. Lond. xxvii. 213, 



pi. xxxix. fig. I. a-c. 

 Polymorphina lactea Brady. 1884. Report on Foram. H. M. S. 



Challenger. Zool. ix. 559. pi, Ixxi. (typical) fig. 11 ; (var.) 



fig. 14. 

 Polymorphina lactea VVhiteaves. 1887. Trans. Roy. Soc. Can. 



iv. 114. 



Fistulose form. 



^^ Polymorpha corcula spinosa" Soldani. 1791. Testaceogra- 



phia. i. pt. 2. 114. pi. cix. fig. I, etc. 

 Misilus aqiiatifer Montfort. 1808. Conch. System, i. 294. 74^ 



genre. 

 Apiopterina d'Orbigni Zborzevvski. 1834. Nouv. Mem. Soc. 



Imp. Nat. Moscou. iii. 311. pi. xxviii. fig. 2. b. 

 Polomorphina lactea (fistulose form) Brady. 1884. Report on 



Foram. H. M. S. Challenger. Zool. ix. 560. pi. Ixxiii. fig. 14. 

 Test ovate, gibbous, slightly unsymmetrical ; anterior extrem- 

 ity acute ; posterior obtuse, rounded. Chambers few, oblong, 

 oblique, somewhat inflated. Sutures depressed. Surface smooth. 

 Aperture simple, circular or oval, radiate. 



Locality. Timber Creek, in the yellow limestone. Rare. 

 Teredo bed. Quite abundant. 



The fistulose forms are those having a hollow, like a pipe or 

 reed. They are occasionally found in the teredo bed. 



Polymorphina oblonga d'Orbigny. 

 Polymorphina oblonga d'Orbigny. 1846. Foram. Foss. Vien. 



232. pi. xxii. figs. 29—31. 

 Polymorphina uvceformis Reuss. 1855. Zeitschr. d. deutsch. 



geol. Gesellsch. vii. 289. fig. 5. 

 Polymorphina guttata Reuss. 1870. Sitzungsb. d. K. Akad. 

 Wiss. Wien. Ixii, 487 ; Schlicht. 1870. Foram. Pietzpuhl. 

 pi. XXX. figs. 25-32. 

 Polymorphina oblonga Brady. 1884. Report on Foram. H. M. 

 S. Challenger. Zool. ix. 569. pi. Ixxiii. figs. 2-4. 

 Test elongate, smooth, anteriorly acuminate, posteriorly obtuse, 

 compressed ; with six oblong chambers, convex ; sutures exca- 

 vate, aperture radiate. 



Locality. Timber Creek, in the teredo bed. Rare. 



