18 PEOCEEDINGS OF THE NATIONAL MUSEUM vol.67 



SIPHOGENERINA BIFRONS (H. B. Brady), var. STRIATULA Cushman 



Plate 2, fig. 6; plate 4, figs. 1-3 



Siphogenerina bifrons (H. B. Brady), var. strialula Cushman, Proc. U. S. 

 Nat. Mus., vol. 51, 1917, p. 662; vol. 56, 1919, p. 620; Bull. 100, U. S. 

 Nat. Mus., vol. 4, 1921, p. 278, pi. 56, fig. 4. 



Description. — Variety differing from the typical in having the sur- 

 face with numerous longitudinal striations, rather more elongate, 

 and the central indented portion deeper and more defined. 



The only localities for this variety are in the Pacific. It was 

 originally described from the Philippines, where it occurs at numerous 

 stations in 135 to 554 fathoms with a single record at 1,262 fathoms. 

 I have also had it from off New Zealand. 



Heron-Allen and Earland^^ mention feebly striate specimens of S. 

 hifrons occurring as fossils. 



SIPHOGENERINA AUSTRALIENSIS (Goddard and Jensen) 



Sagrina australiensis Goddard and Jensen, Proc. Linn. Soc. New South 

 Wales, vol. 32, 1907, p. 299, pi. 6, figs. 3a-c. 



The authors describe this species as follows : 



This species has a nvigerine commencement, after which it consists of a 

 uniserial row of oval chambers C3^1indrical in section. The character of the shell 

 is intermediate between S. dimorpha and S. virgula. The shell is thick and 

 studded with large pits as in S. dimorpha. There are also tubercles externally 

 approximating to the spines of S. virgula. The neck is as in S. virgula. 



There is a distinct constriction at the junction of the chambers, and some of 

 the chambers are prodcced outwards into small monticular prominences. (See 

 fig. 3a.) The chambers increase gradually in size. 



Under a high power the surface appears as in fig. 36. On focussing down, 

 canals are seen in the walls, extending from the interior and opening to the 

 exterior in the small tubercles. 



Size: Length, 0.7 mm. 



Their specimens were from 15 fathoms, off Palm Island, near 

 Townsville, Queensland, collected by C. Hedley. 



From the rather poor figures and rather meagre description, it is 

 difficult to discover much as to the relationships of this form. 



There is a very slender species with numerous uniserial chambers 

 and 10 to 12 costae, which occurs in the Navarro, Upper Cretaceous 

 clays, one-half mile south of Kemp, Texas. This may be known 

 as Siphogenerina plummeri Cushman, new species, and will be 

 figured later. 



There are numerous other species assigned by various authors to 

 Sagrina which do not seem properly to belong to Siphogenerina. 



i» British Antarctic Exped., Zoology, vol. 6, 1922, p. 186. 



