22 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I48 



Candeina nitida is a very distinctive species, having 3 large, highly 

 inflated final chambers that envelop most of the previous part of 

 the test. Pores are distributed along the sutures of the last 3 chambers. 



Distribution. — This species is very rare in the northwestern part of 

 the Atlantic and was recorded only in the Sargasso Sea, at summer 

 station KK and spring station 3. At both stations the frequencies were 

 less than 1 percent. 



Genus GLOBIGERINELLA Cushman, 1927 



GLOBIGERINELLA AEQUILATERALIS (Brady) 



Plate 7, figures 3-5 



Globigerina aequilateralis Brady, 1884, Rep. Voy. Challenger, Zool., vol. 9, 



p. 605, pi. 80, figs. 18-21. 

 Globigerinella aequilateralis Bradshaw, 1959, Contr. Cushman Found. Foram. 



Res., vol. 10, pt. 2, p. 38, pi. 7, figs. 1, 2.— Be, 1959. Micropaleontol., vol. 5, 



No. 1, pi. 1, figs. 19, 20, 27. 

 Globigerinella siphonijera (d'Orbigny, 1839) Parker, 1962, Micropaleontol., 



vol. 8, No. 2, p. 228, pi. 2, figs. 22-28. 



In its early stages this species is distinctly trochospiral and evolute. 

 As growth proceeds the coiling becomes planispiral and the test 

 partially involute with the later chambers overlapping and sometimes 

 obscuring the trochospiral portion of the test. The large, inflated 

 forms, however, are variable in coil and some tend to uncoil and 

 grow erratically, with the final 1 or 2 chambers sometimes being 

 added on either the dorsal or ventral side. 



The wall is lacking in the axial region of the chambers so that the 

 sides of the chambers in the later stages do not touch the previous 

 whorl. As a result the aperture is usually a basal slit but is variable in 

 size and extends entirely around the final chamber. It is often visible 

 around the margins of the previous 1 or 2 chambers. In the larger 

 forms that are partially uncoiled, the axial regions of the last few 

 chambers are entirely exposed. 



Banner and Blow (1960, p. 22) have resurrected the name H. 

 siphonijera (d'Orbigny) for this species. However, this unnecessary 

 name change is based on an uncertain type specimen (Todd, 1963, 

 p. 110) and is contrary to the present principle of conservation of the 

 International Code of Zoological Nomenclature. 



Distribution. — Globigerinella aequilateralis is one of the dominant 

 species of the subtropical assemblages. In the spring it reached a 

 maximum frequency of 60 percent in the Sargasso Sea at station 2. 

 In the summer the maximum frequency was 28 percent at station 



