NO. 3 CUSHMAN AND MCCULLOCH : SOME NONIONIDAE 173 



Distribution. — This species was described from off California. It is 

 often difficult to distinguish it from E. spinatum Cushman and Valentine 

 in the same region. There seem to be nearly all graduations between the 

 two species. The records indicate that this species has been recorded now 

 as far southward as Peru, in veiy shallow waters with the exception of 

 Station 227, off Guadalupe Island, Mexico, in 200 fms. 



Elphidium spinatum Cushman and Valentine 

 Plate 19, Figs. 10, 11 



Elphidium spinatum Cushman and Valentine, Stanford Univ., Dept. 

 Geology, Contr., vol. 1, no. 1, 1930, p. 21, pi. 6, figs. 1, 2. — Cushman and 

 Moyer, Contr. Cushman Lab. Foram. Res., vol. 6, 1930, p. 56. — Cush- 

 man, U.S. Geol. Survey Prof. Paper 191, 1939, p. 63, pi. 18, figs. 3, 4. 



Test compressed, completely involute, periphery in the adult rounded 

 and set with short spines, especially on the later chambers, extending for- 

 ward obliquely from the anterior margin of the periphery of the chamber 

 in a somewhat tangential direction; chambers numerous, 11-13 in the 

 adult coil, distinct, only slightly inflated in the last half coil ; sutures 

 slightly if at all depressed, marked by the retral processes, usually 7 or 8 

 in number, short; wall veiy finely perforate; aperture very small, at the 

 base of the apertural face. 



Diameter 0.55-0.80 mm; thickness 0.22-0.25 mm. 



Stations: 1, 77, 112, 204, 221, 502, 539, 548, 556. 



Distribution. — This species has been known only from the coast of 

 California heretofore. These new records place this species in shallow 

 waters as far south as Ecuador. 



Elphidium spinatum Cushman and Valentine, var. magnificum 



Cushman and McCulloch, new variety 

 Plate 20, Figs. 1, 2 



Variety differing from the typical in the much greater development of 

 the spines, of which there are often more than one to a chamber and on 

 the middle portion of the periphery of the chamber instead of confined to 

 the peripheral angle. 



Holotype of variety (AHF no. 38) from locality 548. 



This variety represents a veiy high degree of spinose ornamentation 

 for this genus. 



Stations: 76, 77, 210, 2046, 2054, 2061, 548. 



