Manchester Memoirs, Vol. Ixii. (19 17) 87 



197. Frondicularia alata. d'Orbigny. 



Frondicularia alata, d'Orbigny, 1826. Ann. Sci. Nat. vol. VII, 



p. 256, No. 2. 

 F. alata, Brady, 1884, Chall. Rep., p. 522, pi. LXV, figs. 20-23; 



and pi. LXVI, figs. 3-5. 



Extremely rare. A single specimen obtained from Gather- 

 ing No. 1, (1893). 



198. Frondicularia goldfussi, Reuss. 



Frondicularia goldfussi, Reuss, i860, Sitz. k. Ak. Wiss Wien, 

 vol. XL, p. 192, pi. IV, fig. 7. 



This is a delicate lanceolate form of F. alata. The test 

 is very thin and produced at the base into a long spine. The 

 Biarritz specimens, which are not rare, are almost invariably 

 of flabelline growth and the primordial segment is long and 

 narrow, instead of being globular as is usual in the nodosarian 

 type. 



199. Frondicularia ferruginea (Terquem.) 



PI- V. fig. 7. 



Flabellina ferruginea, Terquem, 1876. Bull. Soc. Geol. France. 



[3]. vol. IV, p. 491, pl. XVI, figs. 18-19. 



Very rare in the Marl. This species was described by 

 Terquem as occurring in the Bajocian Beds of the Moselle 

 district. The specimens figured by him are of the flabelline 

 form, whilst the few found by me in the Biarritz Marl are of the 

 true frondicularian type. The species is of the complanata 

 type, but differs from it in having the sutures depressed and the 

 lateral surfaces of the segments salient. It also may have a 

 slight keel on the margin of the earlier segments. 



200. Frondicularia in^equalis, Costa. 



Frondicularia incequalis, Costa, 1855 (1857), Mem. Ace. Sci. 



Napoli, vol. II, p. 372, pl. Ill, fig. 3. 

 F. incequalis, Brady, 1884, Chall. Rep., p. 521, pl. LXVI, figs. 



8-12. 



Rather rare. Found only in Gatherings No. 5 and 9, 1893. 



201. Frondicularia archiaciana, d'Orbigny. 



Frondicularia archiaciana, d'Orbigny, 1840, Mem. Soc. Geol. 



France [1], vol. IV, p. 20, pl. I, figs. 34-36. 

 F. archiaciana, Brady, 1844, Chall. Rep., p. 520, pl. CXIV, fig. 



12. 



Very rare and fragmentary. 



* 



