NO. 5 FORAMINIFERAL GENERA — LOEBLICH AND TAPPAN 23 



Genus WEBBINA d'Orbigny, 1839 

 Plate 4, figure 6 



Original description. — In Ramon de la Sagra, Histoire physique, 

 politique et naturelle de I'lle de Cuba, p. 26, Paris, 1839. 



Type species. — Wehbina rugosa d'Orbigny, 1839. Subsequent des- 

 ignation by d'Orbigny in Barker-Webb and Berthelot (1839, p. 126). 

 First species published under the genus. 



Diagnosis. — Test attached by entire lower surface, chambers few in 

 number, inflated, surface marked by faint transverse "growth lines," 

 margins of chambers bordered by a fimbriate "keel"; wall thin, cal- 

 careous, appearing milky white and imperforate, surface smooth except 

 for transverse wrinkles; aperture terminal, surrounded by a phialine 

 lip. 



Type. — Holotype in M.N.H.N., Paris. From the Recent, I'lle de 

 Teneriffe, lies Canaries. As far as known it is represented by a single 

 specimen. 



Discussion. — According to Galloway (1933, p. 296) this form is 

 "coarsely perforate, with much secondary material making the surface 

 rough." Cushman (1948, p. 339) states that the test is perforate. The 

 original figures given by d'Orbigny for this species are very mislead- 

 ing. The holotype does not appear either coarsely perforate or with 

 a roughened surface except for the fimbriate-appearing keel. 



Genus MONALYSIDIUM Chapman, 1900 

 Plate 4, figure 5 



Original description. — Linn. Soc. Journ, Zool. London, vol. 28, 

 No. 179, p. 3, 1900. 



Type species. — Peneroplis (Monalysiditim) sollasi Chapman, 1900. 

 Original designation. 



Diagnosis. — Test free, consisting of numerous subglobular cham- 

 bers, early ones arranged in an evolute planispiral coil, later portion 

 uncoiled and rectilinear, with chambers subglobular; wall calcareous, 

 distinctly perforate in appearance; aperture terminal, somewhat pro- 

 duced on a neck with phialine, fimbriate lip. 



Ty/)^.— Plolotype (B.M.N.H. No. ZF 3577) from beach at Avalau 

 Island, Funafuti Atoll. 



Discussion. — Monalysidimn was originally described as a subgenus 

 of Peneroplis Montfort, 1808, It seems similar to Spirolina, and not 

 congeneric with the straight, uncoiled forms such as M. politum 

 Chapman. Chapman stated that the test wall was imperforate and 



