FORAMINIFERA— HERON-ALLEN AND EARLAND. 177 



CRISTELLARIA, Lamarck. 



422. Cristellaria tenuis (Boniemaun). 



Marginulina tenuis, BonienicUin, 1855, FSH. p. 326, pi. xiii, fig. 1-1. 

 Cristellaria „ Brady, 1884, FC. p. 535, pi. Ixvi, figs. 21-23. 



Stations 3, 6. 



Remarkably fine, long specimens at Station 6. 



423. Cristellaria schloenbachi, Reuss. 



Cristellaria schloenbachi, Reuss, 1862, NHG. p. 65, ]i\. vi, figs. 14, 15. 



Cushmau, 1910, etc., FNP. 1913, p. 77, pi. xxxvi, fig. 6. 



Stations 2, 6. 



Rare, but typical, best at Station 6. 



424. Cristellaria tricarinella, Reuss. 



Cristellaria tricarinella, Reuss, 1862, NHG. p. 68, pi. vii, fig. 9 ; pi. xii, figs. 2-4. 

 Brady, 1884, FC. p. 540, pi. Ixviii, figs. 3, 4. 



Stations 2, 6. 



A small fossil specimen at Station 2. At Station frequent and finely 

 developed individuals. Some of these have one or more spines at the aboral end 

 of the shell. The edge is thickened and rounded in all the individuals, some of 

 them showing the rudimentary median keel from which the species derives its 

 name. At Station 6 an abnormal specimen was found in ^vhich the young shell, 

 after making six chambers, turned suddenly back and added another six m the 

 same axis but directly opposite to the original line of growth. 



425. Cristellaria variabilis, Reuss. 



Cristellaria variabilis, Reuss, 1849-50, FOT. p. 369, pi. xlvi (i), figs. 15, 16. 



Cushman, 1910, etc., FNP. 1913, p. 70, pi. xxxvi, figs. 1-3. 



Stations 3, 6 (+ R. d. J.). 



Excellent recent specimens at both Stations. Fossil also at Station 3. 



426. Cristellaria crepidula (Fichtel and Moll). 



Nautilus crepidida, Fichtel and Moll, 1798, TM. p. 107, pi. xix, figs. g-i. 

 Cristellaria „ Cushman, 1910, etc., FNP. 1913, p. 70, pi. xxix, figs. 5, 6 ; pi. xxxi, 

 figs. 2-5. 



Stations 2, 3, G, 8, 11, 36 (+R.d. J.). 



Very good specimens, often very large at Stations 2 and 6. Very small at 

 the others, excepting at Station 3, where they are normal. Fossil specimens at 

 Stations 2, 3 and 6. 



[Arenaceous isomorph, HaplojiJirajjiiiitim cassis, Parker.] 



VOL. VI. .^ A 



