266 HENRY B. BllADY. 



connection with the genera Nuhecularia and Dacfylopora 

 will be alluded to presently in the notice of two species, N. 

 tibia and D. eruca. Concerning the spiral types there is, 

 perhaps, even less that calls for remark. The genera Pene- 

 roj)olis, Orbiculi?ia, Orhitolites, and Alceolina, are all well 

 represented in the " Challenger " gatherings, but the results 

 of their examination tend rather to diminish than to increase 

 the number of forms to be recognised as " species." 



NuBECULARiA TIBIA, Jones and Parker, PI. VIII, figs. 1, 2. 



Nuhecularia tibia, Jones and Parker, 1860. ' Quart. Journ. Geol. Soc.,' 

 vol. xvi, p. 455, p. 20, figs. 48—51. 



The interest attaching to this simple little organism depends 

 upon the fact that until recently it has only been recognised 

 as a Triassic or Ehsetic fossil. It was described by Messrs. 

 Jones and Parker, loc. cit., in their paper upon the Fora- 

 minifera of certain marls from Chellaston in Derbyshire. 

 Within the last few months I have identified specimens in 

 Mr. E. A. Walford's collection of microzoa from the Upper 

 Lias of Banbury, and this completes the record of its geo- 

 logical history; it is, nevertheless, quite possible that, owing 

 to its minute size and inconspicuous appearance, it may 

 have been overlooked in other habitats. A careful com- 

 parison of specimens from all the known sources, recent and 

 fossil, reveals no characters not common to the whole of 

 them, none at any rate that can be regarded as zoologically 

 distinctive. 



Nuhecularia tibia occurs at two of the " Challenger " 

 stations, both in comparatively shallow water, namely, 

 amongst the Philippine Islands (95 fathoms), and in Hum- 

 boldt Bay, Papua (37 fathoms). 



Dactylopora eruca, Parker and Jones. PI. VIII, 

 figs. 3, 4. 



Dacfi/lopom eruca, Parker and Jones, 1860. ' Ann. and Mag. Nat. Hist.,' 



ser. 3, vol. v, p. 473; Carpenter, 1862, ' Introd.,' 



p. 128, pi. 10, figs. 1— S. 

 Hanloporella eruca, Giimbul, 1872. ' Abhandl. der k. bayer. Akad. der W./ 



II CL, vol. xi, p. 25G, pi. D. 1, fig. 1. 

 Decaisnella eruca, Munier-Cbalmas, 1877. ' Comptes Rendus de I' Acad, 



des Sci.,' vol. Ixxxv, p. 816. 



I do not propose to enter here upon the controversy con- 

 cerning the true nature and position of the Dactyloporklos 



