Manchester Memoirs, Vol. Ixii. (19 17) 65 



which are ornamented with longitudinal striae, leaving the 

 elongate costate ones as N. comata. In fact T consider N. glans 

 to be a striate variety of N. laevigata, and N. comata a costate 

 variety of N. radicula (Linne). 



(An examination of Halkyard's specimens leads us to agree 

 with his conclusions. Both in shape and external ornament 

 there is a wide difference between this striate variety of N. 

 Icevigata, d'Orbigny, such as occurs at Biarritz, and the coarsely 

 sulcate form TV. comata (Batsch) which is a not uncommon 

 recent tropical form.) 



134. Nodosaria radicula (Linne.) 



Nautilus radicula, Linne, 1758, Syst. Nat., ed. 10, p. 711; 1788, 

 13th (Gmelin's) ed., vol. I, pt. VI, p. 3373, No. 18. 



Nodosaria radicula, Brady, 1884, Chall. Rep., p. 495, pi. LXI, 

 figs. 28-31. . 



Common in all the Gatherings. 



(A very fine series of specimens exhibiting all degrees of 

 rotundity and attenuation, and in some cases displaying a ten- 

 dency to assume a dentaline curvature of the later chambers.) 



135. Nodosaria radicula, var. annulata, Terquem & Berthelin. 



Glandulina annulata, Terquem & Berthelin, 1875, Mem. Soc. 



Geol., France, (2), vol. X, p. 22, pi. I, (XI), figs. 25a, b. 

 Nodosaria radicula, var. annulata, Brady, 1884, Chall. Rep., 



p. 496, pi. LXII, figs. 1-2. 



Not rare, and persisting throughout the wfiole of the beds. 

 The specimens are more elongated than those figured by Brady, 

 and do not often show the diminishing diameter of the final 

 chambers which gives the typical shell its fusiform contour. 



(A few of the specimens show signs of compression, thus 

 assuming a linguline mode of growth, but this may be due to 

 pressure in fossilization.) 



136. Nodosaria radicula, var. ambigua, Neugeboren. 



Nodosaria ambigua, Neugeboren, 1856, Denkschr. k. Ak. Wiss. 



Wien, vol. XII, (2), p. 71, pi. I, figs. 13-16. 

 N. radicula, var. ambigua, Brady, 1884, Chall. Rep., p. 496, 



pi. LXII, fig. 3a, b. 



Rare, only 3 small specimens having four segments each 

 were discovered. 



