60 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I49 



ELPHIDIUM PAUCILOCULUM (Cushman) 

 Plate 3, figure 3 



Nonion pauciloculum Cushman, Cushman Lab. Foram. Res., Spec. Publ. 12, 



p. 24, pi. 3, fig. 25, 1944. 

 Elphidium subarcticum Cushman, Cushman Lab. Foram. Res., Spec. Publ. 12, 



p. 27, pi. 3, figs. 34, 35, 1944. — Parker, Bull. Mus. Comp. Zoo!., vol. 106, 



No. 9, p. 412, pi. 5, fig. 9, 1952a.— Parker, ibid., vol. 106, No. 10, p. 449, 



pi. 4, figs. 3-6, 8, 1952b. 



In the material from L.I.S. some specimens have wide white bands 

 of amorphous material covering the sutural areas. Others have a 

 deep slit along the suture and white bands on either side. Still others 

 exhibit a combination of the two. Retral processes were observed on 

 some of the specimens. The holotype of the species described by 

 Cushman as N. pauciloculum is a form with depressed slitlike 

 sutures, while the holotype on E. subarcticum is a form with retral 

 processes. In L.I.S. the range of variation between these extremes 

 is continuous. Parker (1952a) observed the same relationships in 

 her study of the fauna from the Gulf of Maine. However, she chose 

 to use the name E. subarcticum. Cushman (1944) described both 

 species in the same paper, but N. pauciloculum was described on an 

 earlier page and therefore has priority. 



This species is common throughout L.I.S. It usually comprises 

 less than 10 percent of the total population, although at a few stations 

 it comprises as much as 30 percent of the living population. 



ELPHIDIUM TISBURYENSE (Butcher) 



Plate 3, figure 4 



Nonion tisburyensis Butcher, Contr. Cushman Lab. Foram. Res., vol. 24, p. 22, 

 text figs. 1-3, 1948. 



This species closely resembles E. orbicular e (Brady). It differs 

 from the latter in that the individual chambers are more inflated and 

 the test is not as thick and orbicular. Nevertheless, the two species 

 are morphologically very similar, and further study on the expected 

 range of variation is desirable. The material from L.I.S. was 

 identified as E. tisburyense because as a group the specimens more 

 closely resemble this form. 



A few living and dead individuals of this species were found at 

 stations 59 and 98a. A few dead individuals were found at stations 

 19, 74, and 123. 



