276 HENRY B. BRADY. 



It is a rave form, and individuals like that represented by 

 fig. 21 may easily be mistaken for minute Nodosaria. 



Specimens of this species have been found at three localities 

 in the Eastern Archipelago, all in shallow water (15 to 37 

 fathoms) and in one deeper sounding on the coast of South 

 America, off Pernambuco (675 fathoms). 



SaGRINA DIVARICATA, 71. sj).,V\. VIIT, figs. 22 — 24. 



Characters. — Test free, moniliform ; spiral chambers few 

 and minute, forming an obscure rounded mass, altogether but 

 little larger than one of the later segments. Later segments 

 two to four in number, subglobular, arenaceous externally, 

 united by clear, non-arenaceous, stoloniferous tubes, of length 

 equal to about half the diameter of the larger chambers. 

 Aperture an elongate, tubular neck, often longitudinally far- 

 rowed, and with an irregular, expanded lip. Length, Vir 

 inch (0-5 millim.). 



The occurrence of arenaceous modifications of the dimor- 

 phous UmgerijKB is quite in harmony with the parallelism 

 that has been suggested between them and the Textularian 

 series. One species of Sagrijia, hitherto undescribed, but 

 not uncommon at some of the '^Challenger" stations, can 

 only be distinguished with difficulty from the Clavuline 

 group of Textularice , its most recognisable character, as in 

 so many other instances, being a tubular neck. In confor- 

 mation it accurately resembles S. dimorpha, P. and J. ; the 

 test is thin, but it is composed of fine sand-grains, of uniform 

 size, firmly compacted. This species helps to connect the 

 clear-shelled forms with the rough Cretaceous species de- 

 scribed by d'Orbigny. 



But the form now under consideration, Sagrina dicaricata, 

 presents in some respects a further deviation from the typical 

 structure than the Clavuline variety alluded to, or, indeed, 

 than any previously noticed. Its general features will be 

 readily gathered from the description and figures. Specimens 

 are rarely found entire owing to the tenuity of the con- 

 necting stoloniferous tubes, but in certain tropical shallow- 

 water sands, fragments showing the neck, and sometimes one 

 or two segments, are not unfrequent. In complete specimens 

 the initial chambers are clnstfred into a little ball scarcely 

 bigger than one of those subsequently formed. 



The best examples that have been found occur in material 

 from Humboldt Bay, Papua (37 fathoms), and off Toiigatabu 

 (18 fathoms). 



