the Nomenclature of the Foraminifera. 227 



imperfect), in which delicate riblets take the place of costae as 

 ornamentation. These riblets do not run the entire length of 

 the shell, and become, on the large terminal chamber, fine hair- 

 like markings. The chambers are also less separated at the 

 sutures than in N. Raphanus. Figs. 2 c and 2 d represent the 

 one an outside view, the other a section, of a shortened, more 

 conical form of Nodosarina, with a similar striate or hairy orna- 

 ment running over it. Both contour and surface-marking are 

 accurately given in D'Orbigny's f Modele' No. 51 (Nodosaria 

 [Glandulina) glans). 



III. Nautilus (0.) Murex. The Warty Sea-staff. PI. 2. figs. 3 a, 3Z>. 



[Nodosaria Murex, Batsch.] 



(Trans.) "The chambers are round and bullet-shaped, covered with 

 warts, and separated by smooth belts. The specimen ground 

 down is curved." 



So far as we know, this peculiar form has not been figured by 

 any other author, neither have we ever seen specimens of the shell, 

 though we have no reason to doubt the existence of such a variety. 



IV. Nautilus (0.) scalaris. The Yoked Sea-staff. PI. 2. figs. 4 a,b. 



[Nodosaria scalaris, Batsch.] 

 (Trans.) "The round, bullet-shaped chambers are provided with deli- 

 cate ribs, running perpendicularly and joining where the chambers 

 meet." 



D'Orbigny subsequently figured the same form as Nodosaria 

 longicauda. The figure in Professor Williamson's Monograph 

 (Rec. For. Gt. Br. pi. 2. fig. 38), where it is given as N. radicula, 

 Mont., might almost have been taken from the same specimen 

 as that drawn by our author. 



V. Nautilus (O.) obliquatus. The Slant-grooved Sea-staff. 

 PI. 2. figs. 5 c-5 d. [Nodosaria obliquata, Batsch.] 

 (Trans.) " This very much elongated shell has longish chambers, 

 which run almost into one another ; and it is provided with string- 

 like ribs, which run in a not quite straight direction down the shell." 

 Figures 5 a, b, & d show an even-margined, straight Nodosa- 

 rian, with oblique parallel ribs. Figure 5 c is a portion of a 

 somewhat curved specimen with similar ornamentation, showing, 

 by its association with the other, a correct appreciation of the 

 valuelessness of mere curvature as a specific character. The 

 same form has been figured by Reuss (Zeitschr. Deutsch. Geol. 

 Gesel. vol. iii. pi. 3. fig. 12) as Dentalina obliquestriata. 



VI. Nautilus (0.) vertebralis. The Vertebral Sea-staff. PI. 2. 



figs. 6 a, 6 b. [Nodosaria Fascia, Linn.] 

 (Trans.) "A prolonged almost unjointed shell, which has a few 



15* 



