ART. 25 GENERA SIPHOGENERINA AND PAVONINA CUSHMAN 17 



ing rapidly broader, then contracted where the uniserial portion 

 begins; sutures hardly depressed, distinct, often of clear material, 

 appearing darker than the rest of the test; aperture rounded or 

 elliptical, without a distinct neck but with a slight rounded lip; 

 microspheric form usually the larger. 



Length, 0.75-1 mm. 



Distribution. — The species was originally described by Brady 

 from a dredging of the Challenger in 345 fathoms on the Hyalonema 

 ground off southeastern Japan, and was apparently not obtained 

 elsewhere by the Challenger. Egger records it from off western 

 Australia but his figures are not at all characteristic, and may not rep- 

 resent the species. Millett's note on his Malay collections is as fol- 

 lows: ''Of this rare form a few poor examples occur at several sta- 

 tions." He does not figure them. Chapman records a specimen 

 from off Funafuti in 2,400 fathoms. I had excellent material from 

 stations off southern Japan and the Philippines. 



In the fossil state it is recorded by Schubert from the Bismarck 

 Archipelago, and by Heron-Allen from the Antartic. Egger records 

 it from the Cretaceous of Central Europe, but an examination of the 

 figures he gives shows little in common with the Pacific material, 

 and the Cretaceous material is something else. 



The very restricted records for this species seem to show that its 

 main range is from southern Japan to the Philippines, and southward. 

 Most of the records are in considerable depths, and it does not belong 

 to the ordinary "coral-reef fauna," but probably is more widely 

 distributed in the Indo-Pacific than the few records indicate. 



SIPHOGENERINA BIFRONS (H. B. Brady), var. SYDNEYENSIS (Goddard and Jensen) 



Plate 3, figs. 10a, b 



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

 Wales, vol. 32, 1907, p. 304, pi. 6, figs. 4a, b. 



The description given by the authors is as follows : 



This species has a straight cylindrical test. The commencement is a large 

 hemispherical chamber, which, however, contains one septum, indicating a uvig- 

 erine commencement. The subsequent chambers are short and cylindrical, 

 and do not at first increase in diameter. Subsequently they increase slowly in 

 diameter as well as in length (fig. 4a; pi. 3, fig. 10a). The surface of each cham- 

 ber is ornamented with minute spines, and two or three extraordinarily large 

 oval pores. The latter are irregularly distributed, but are chiefly found toward 

 the proximal end of each segment. Size: Length, 0.57 mm. 



From the figure given by the authors this seems very certainly a 

 varietal form of S. hifrons (H. B. Brady), 



The specimens were from 300 fathoms, 27.5 miles east of Sydney 

 Heads, New South Wales, dredged by C. Hedley. 



