FORAMINIFERA OF THE ATLANTIC OCEAjST. 29 



thin specimens or opaque in more thickened ones, along the lateral 

 margins usually clear even in thickened specimens; aperture elon- 

 gate, fairly narrow, connecting with the interior by a fairly long 

 entosolenian nock. 



Length up to 1 mm. ; breadth slightly less. 



Distribution. — It is strange that this species which is apparently 

 so common in many parts of the world has not occurred in its typical 

 form in the western Atlantic collections. It seems to be abundant 

 about the British Isles. 



LAGENA LAEVIS (Montagu). 



Plate 5, fig. 3. 



There are very numerous records for this species, covering most 

 of the areas from which foraminifera have been recorded, but a 

 reference to the various forms figured will show that many different 

 smooth forms have been included under this name. Such specimens 

 are not recorded in the Albatross collections, although there are 

 numerous smooth forms which might well fit some of the figures 

 given for this species. 



LAGENA LAEVIS (Montagu), var. NEBULOSA, new variety. 



Plate 5, figs. 4, 5. 



Lagena laevis H. B. Brady (part) (not Montagu), Rep. Voj'. Challenger, 

 Zoology, vol. 9, 18S4, p. 455, pi. 5G, figs. 10-12, 13 [?], 14 [?]. 



Description. — Variety differing from the typical in the form of 

 the test which is globular or somewhat cylindrical, the neck slender, 

 test with the sides parallel, the surface of the test with numerous 

 thickenings giving a clouded appearance, almost subspinose. 



Length up to 0.80 mm. 



Distribution. — Type-specimen (U.S.N.M. Cat. No. 19076) from 

 Albatross station D2144, in 896 fathoms (1,639 meters), in the Carib- 

 bean. Specimens which may be referred to this variety occur at 

 two different localities in the Albatross dredgings. There are three 

 stations in the Caribbean, the remainder oft' the northeastern coast 

 of the United States. Brady records Lagena laevis in this same 

 general area from off the coast of Brazil, off the Virgin Islands, off 

 Bermuda, and off the eastern coast of the United States. An ex- 

 amination of some of the originals of these records may show that 

 they belong to this variety. 



