270 HENRY B. BRADY. 



as will be seen, to three species. But the series that has 

 been collected from the '' Challenger " dredgings much en- 

 larges the area of our knowledge. Not only have two of the 

 forms which have been alluded to, together with their Fla- 

 belline modifications, been found, but in addition a number 

 of other smaller species of widely different contour, some 

 of which are described and figured in the present paper. 



The little branching organism, named Ramulina by Pro- 

 fessor T. Rupert Jones, hitherto only known by worn frag- 

 ments occurring amongst fossil microzoa of Cretaceous age, 

 has been found in sufficient numbers, and, notwithstanding 

 its fragile nature, sufficiently complete in all its parts to 

 yield accurate data as to its zoological characters. 



The genus TJmgerina has also received considerable acces- 

 sions, and the connection, suggested by Messrs. Parker and 

 Jones, between the normal spiral varieties and the dimor- 

 phous shells coiistituting d'Oi'bigny's genus Sogrina, is con- 

 firmed and illustrated by certain new and interesting 

 modifications of the typical structure. A. notice of some of 

 these will be found on a subsequent page. 



Gewws— FRONDICUL ARIA, d' Orligny. 



Froxdicularia spathulata, n. sp. PI. VIII, fig. 5 a. h. 



Characters. — Test long, narrow, tapering, compressed ; 

 margin rounded, somewhat lobulate ; sutures but slightly 

 excavated. Primordial chamber inflated ; early segments 

 morebentthan the latter ones. Surface smooth. Length-^ 

 inch (1*0 millim.). 



This is one of the narroAV compressed Nodosarian shells 

 that might svith almost equal propriety be placed either with 

 Lingulina or Frondicularia, the slightly inflated primordial 

 chamber and bent earlier segments suggesting the latter 

 genus for preference. Terquem figures a somewhat similar 

 form as Frondicidaria sacculus (' Sixieme Mem. sur les Foram. 

 du Lias,' p. 482, pi, 19, fig. 20 a. b.) and the Fr. linearis 

 of Philippi (' Beitr. zur Kennt. d. Tert-Verstein,' p. 5, pi. 

 1, fig. 32) is a Flabelline variety, with analogous general 

 contour. 



Such varieties are very rare in the living condition, and 

 there is only a single habitat to record for that now described, 

 namely, off" the Ki Islands, 129 fathoms. 



