STUDIES m FORAMmrFERA 



151 



? Family Buliminidae Jones, 1876 

 Genus Tosaia Takayanagi, 1953 



Plate 34, Figure 18 



Tosaia Takayanagi, Inst. Geol. Paleontol. Sendai, Short Paper 

 No. 5, p. 30, 1953. 



Type species: Tosaia hanzawai Takayanagi, 1953, 

 Pliocene Nobori formation, from cliff 100 miles east of 

 Nobori, Hane-muri, Aki-gim, Kochi Prefecture, Japan. 



Diagnosis: Test rapidly enlarging, triserial or oc- 

 casionally biserial in last three chambers. Early stage 

 obscure, not improbably trochoid. Early chambers 

 depressed, rather inflated, last three or four chambers 

 more inflated, with sutures consequently more de- 

 pressed. Wall calcareous, smooth, finely perforate. 

 Aperture basal, relatively small, provided with a fairly 

 rough lip. 



Discussion: Only three specimens were available for 

 the present investigation: one relatively large paratype 

 here figured, and two smaller, completely triserial 

 specimens. Consequently very little can be added to 

 the original diagnosis and only a statistical investigation 

 as to the variability of this genus can decide if the final 

 biserial arrangement is an aberration or not. 



Takayanagi compares this genus to Ouembelitria, of 

 which the triserial arrangement and the basal aperture 

 are suggestive; that the triseriality is only a matter of 

 convergence is shown by other important characters, 

 namely: the reduction to a biserial arrangement in the 

 final stage; the vertical compression of the young 

 chambers, resulting in subhorizontal sutures; the 

 extension of the wall in a liplike plate at the aperture 

 (without the compact structure of the usual lip) ; and, 

 finally, the much larger test than in Ouembelitria, which 

 is characterized by its very small size. A very uncer- 

 tain character, at present, is the arrangement of the 

 early chambers. The specimens available were too 

 scarce, so that a partial dissolution by acid-treatment 

 was impossible. Immersion in anise oil seems to reveal 

 a trochoid early portion, although this appearance may 

 be due to reflections, and further investigation of 

 numerous and well preserved specimens must be 

 awaited. 



Family Uvigerinidae Galloway and Wissler, 1927 



Subfamily Uvigerininae Galloway and Wissler, 

 1927 



Genus Pseudouvigerina Cushman, 1927 



Plate 34, Figures 19-22 



Pseudouvigerina Cushman, Contr. Cuahman Lab. Foram. Res., 

 vol. 2, p. 81, 1927. 



Type species: Uvigerina cristata Marsson, 1878, 

 Cretaceous of Riigen Island (Pomerania). Figured 

 hypotype from the Upper Cretaceous, Gerhardtsreuter 

 Schichten (Maestrichtian), Starzmiihl near Teisendorf, 

 Upper Bavaria, Germany. 



Diagnosis: Test small, triserial throughout, triangu- 

 lar in cross section. Chambers normally inflated, ex- 

 ternally triangular in section because of the presence of 

 three strong double vertical costae disposed along the 

 line of major inflation of the chambers. Sutures 

 limbate, distinct, slightly depressed ; between the sutures 

 the wall is covered by numerous tubercles, which may 

 become well developed and proportionally large. 

 Aperture circular or subelliptical, with a short neck. 

 Internally, a narrow columellar plate is developed from 

 the early stage, and connected to the aperture (where no 

 tooth is visible). 



Discussion: Cushman described an early biserial 

 stage for Psevdouvigerina. An investigation of hypo- 

 types from the Upper Cretaceous of Bavaria showed 

 the early stage to be triserial in both generations. 



Furthermore, a partial dissolution by hydrochloric 

 acid revealed the presence of an internal plate, some- 

 what oblique and free at its lower end. The plate has 

 no tooth at the apertural end, but terminates at the 

 base of the neck. 



The genus Pseudouvigerina possesses no characters for 

 separation from the Uvigerininae. A geneiic identity 

 of Angulogerina with Pseudouvigerina is at present only 

 suspected. Sigal (1952, p. 219) follows GaUoway in 

 stating that Angulogerina differs from Pseudouvigerina 

 in tending to become uniserial. No comparison in this 

 respect between species of both genera has been made 

 here to confirm this difference. If a tendency to be- 

 come uniserial should be demonstrated also in Pseu^ 

 douvigerina, Angulogerina would become a junior 

 synonym of Pseudouvigerina. 



Class Crustacea 



Order Isopoda ? 



Genus Nodoplanulis Hussey, 1943 



Plate 34, Figure 23 

 Nodoplanulis Husset, Journ. Paleontol., vol. 17, p. 166, 1943. 



Type species: Nodoplanulis elongata Hussey, 1943, 

 Eocene, Cane River formation, La Salle Parish, Lou- 

 isiana. 



Diagnosis: Test elongate, transparent, depressed, 

 with lateral margins parallel. Basal portion flat, de- 

 pressed, provided with a series of four or flve complanate 

 spines. The test consists of six vertically arranged 

 sections; on the base of each a crown of irregularly 

 developed, rarely spinate tubercles is present. Each 

 section appears separated from the others at the surface 

 by a variable and irregularly developed band. The 

 upper end is provided with a "neck" and terminates in 

 an elongate aperture with lip. 



Discussion: Only the holotype was available for 

 study; consequently no sections to show the internal 

 structure were made. Nevertheless the good preserva- 

 tion of the fossil aUows some discussion of the diagnosis 

 given by Hussey. 



