128 BULLETIN 104, UNITED STATES NATIONAL MUSEUM. 



aperture which is somewhat produced, radiate; sutures distinct, 

 oblique, slightly depressed; wall smooth, finely punctate. 



Length up to 2 mm. 



Distrihution. — This typical form of the species is recorded at 

 numerous stations about the British Isles. There are numerous 

 other records for it in the Atlantic, and numerous authors have re- 

 ferred to it specimens from various parts of the world. The only 

 figures are those given by Balkwill and Wright, and they show a 

 more nearly typical, more slender form than that found on the 

 western side of the Atlantic which is here referred to the following 

 variety. 



MARGINULINA GLABRA D'Orbigny, var. OBESA, new variety. 



Plate 37, fig. 1. 



Marginulina glabra Flint (not D'Orbigny), Rep. U. S. Nat. Mus., 1S97 

 (1899), p. 133, pi. 60, fig. 1 (in part). 



Description. — Variety differing from the typical in the larger size 

 and much shorter, broader form. 



Length up to 3 mm. 



Distrihution. — Type-specimen (U.S.N.M. Cat. No. 17489) from 

 Albatross station D2043, in 1467 fathoms (2683 meters), off the 

 northeastern coast of the United States. This larger, stouter form 

 which may be referred to D'Orbignj^'s species as a variety, is very 

 common at numerous stations around latitude 40 and longtiude 70, 

 southwest of the New England coast, and runs south at occasional 

 stations about the Gulf of Mexico and the Caribbean. Flint's sta- 

 tions for the species were mostly in this same region, and Brady 

 records M. glabra from a Challenger station off New York where he 

 presumably had this same large form. There are numerous other 

 scattered records for the species in the Challenger report, and from 

 off the coast of the British Isles, but specimens are not figured and it 

 is very difficult to say just where they should belong without seeing 

 the originals. 



In the microspheric form of the species there are a few chambers 

 which show the coiling condition, but in the megalospheric form 

 specimens occur which, except for their association with the micro- 

 spheric form and their slightly oblique sutures, might be referred 

 to Nodosaria. 



