56 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I49 



relative abundance of E. advena in the living population is usually 

 25-30 percent greater than it is in the total population. The L/T 

 ratio of this species is usually much higher than it is for the other 

 common species, and it is likely that specimens of this species may 

 be fragile enough to be destroyed after death. Specimens of E. 

 advena are almost entirely confined to the 0.125-0.062 mm. size 

 fraction. 



Family MILIOLIODAE 



Genus QUINQUELOCULLNA d'Orbigny, 1826 



QUINQUELOCULINA SEMINULUM (Linn6) 



Plate 1, figure 6 



Serpula seminulum Linne, Syst. Nat., ed. 10, p. 786, 1758. 



Quinqueloculina seminula (Linne) Parker, Bull. Mus. Comp. Zool., vol. 106, 

 No. 10, p. 456, pi. 2, figs. 7a, b, 1952. 



The individuals from L.I.S. are smaller than the figured specimen 

 of Parker (1952b). All specimens have a simple tooth, lack a neck, 

 and are similar in overall shape. 



Living and dead individuals of this species are found with very 

 low frequencies in all parts of L.I.S. 



QUINQUELOCULINA SEMINULUM (Linn6) var. JUGOSA Cushman 

 Plate 1, figure 7 



Quinqueloculina seminula (Linne) var. jugosa Cushman, Cushman Lab. Foram. 

 Res. Spec. Publ. 12, pp. 13-14, pi. 2, fig. 15, 1944.— Parker, Bull. Mus. Comp. 

 Zool., vol. 106, No. 10, p. 456, pi. 2, figs. 8a, b, 1952. 



One live specimen belonging to this variety was found at station 1 , 

 and four dead specimens were found at station 20. 



Family OPHTHALMIDIIDAE 

 Genus CORNUSPLRA Schultze, 1854 

 CORNUSPIRA PLANORBIS Schultze 



Plate 1, figure 8 



Cornuspira planorbis Schultze, Organismus Polythal., p. 40, pi. 2, fig. 21, 

 1854. — Cushman and Todd, Cushman Lab. Foram. Res., Spec. Publ. 21, 

 p. 7, pi. 1, fig. 24, 1947. — Todd and Low, Contr. Cushman Found. Foram. 

 Res., vol. 12, p. 15, pi. 1, fig. 9, 1961. 



A few dead specimens were found at stations 47, 48, 59, 114, and 

 133. Five living individuals were found at station 125. 



