10 PROCEEDINGS OF THE NATIONAL MUSEUM vol.75 



Holotype.—{Csit. No. 20779, U.S.N.M.) from off Juan Fernandez, 

 collected by Dr. Waldo Schmitt. 



This is a peculiar small form especially marked by the coarse 

 perforations and the two distinct ridges close to the median line. 

 It is somewhat similar to a species which occurs off the European 

 coast and has often been known as Bolivina 'plicata d'Orbigny, 

 although it is not that species. Bolivina suhexcavata apparently has a 

 wide range in the South Pacific from other records and material that we 

 have. 



BOLIVINA cf. KARRERIANA H. B. Brady, var. CARINATA Millett 



Plate 4, figure 5 



This species which is figured is much compressed, has numerous 

 chambers which are low and broad with strongly oblique sutures, 

 and all but the last chambers ornamented, with a few distinct 

 longitudinal costae and the periphery subacute. It is not entirely 

 typical of Millett's variety, but may be left under that name until 

 more is known concerning it. 



Genus LOXOSTOMUM Ehrenberg, 1854 



LOXOSTOMUM cf. MAYORI (Cushman) 



Plate 4, figures 6 a-c 



This small, somewhat irregular specimen belongs in this genus, as 

 the aperture is terminal and away from the edge of the last-formed 

 chamber. The wall is finely perforate and the earlier portion has 

 traces of fine longitudinal costae. L. mayori has a wide distribution, 

 and this may be a somewhat irregular form of it. 



Genus UVIGERINA d'Orbigny, 1826 



tlVIGERINA VIRGULINOIDES, new species 



Plate 4, figures 8 a-c 



Test elongate, broadest toward the apertural end, the early portion 

 triserial, later portion irregularly biserial and twisted; chambers 

 numerous, inflated, the last-formed ones forming a somewhat com- 

 pressed test; sutures distinct, depressed; wall smooth, finely 

 perforate, thin; aperture terminal with a short tubular neck and 

 sometimes with a slight lip. 



Length 0.25 mm., breadth 0.10 mm., thickness 0.07 mm. 



Holotype.— {Cat. No. 20780, U.S.N.M.), collected by Doctor 

 Schmitt in his material from Juan Fernandez. 



This is a peculiar species with the last-formed portion becoming dis- 

 tinctly biserial. It resembles somewhat irregular forms of Virgulina, 

 but it has the distinct characters of Uvigerina. There are a number 

 of specimens all of this same form, showing that it is not an abnor- 

 mally shaped specimen. There are a few other species of this genus 

 which become depressed and biserial, mostlj^ in the late Tertiary of 

 the Mediterranean region. 



