FORAMINIFEEA OF NORTH PACIFIC OCEAN. 73 



Description. — Test close coiled, biconvex, umbonate; wall smooth, 

 sutures distinct but hardly, if at all, depressed; periphery of test 

 acute, with a distinct carina of greater or less width, with a long 

 acicular spine opposite each chamber. 



Length without spines about 1 mm. 



Distribution. — Brady records this species from a single Challenger 

 station in the North Pacific, 95 fathoms off the Philippines. Bagg 

 records it from an Albatross station D4000 in 104 to 213 fathoms off 

 the Hawaiian Islands. I have had specimens from one Albatross 

 station H2922 in 268 fathoms and Nero station 2071 in 271 fathoms 

 off the Hawaiian Islands and from several stations off Japan, depths 

 ranging from 37 to 139 fathoms and bottom temperatures from 

 52.9° to 66.6° F. It is interesting to note that one of these stations, 

 D4900, is one from which so many species recorded by Brady from 

 the Philippines have been obtained. 



From the above data the distribution of this species in the North 

 Pacific at least seems to be largely in comparatively shallow, warm 

 waters. 



There seem to be two distinct forms at least which are included 

 under this specific name. One of these is small in size, of compara- 

 tively few chambers in each whorl and with a few long acicular 

 spines radially placed, the peripheral carina being narrow. The 

 other is of much larger size, with many more chambers in each 

 whorl and with many short broad flattened spinose projections 

 extending somewhat backward from the wide peripheral carina and 

 appearing as projections of the carina rather than as distinct spines. 



The small form with the long acicular spines is the only one which 

 I have seen in the North Pacific material. The synonymy is not 

 clear on these two forms and it will be interesting to see if these are 

 not really distinct from one another. The figures given by Flint 

 show well the contrast in size and other characters between these 

 two forms. 



CRISTELLARIA ECHINATA (d'Orbigny). 



Plate 34, fig. 5. 



"Nautili Echinati" etc. Soldani, Testaceographia, vol. 1, pt. 1, 1789, p. 65, pi 



59, figs, qq, rr. 

 Nautilus calcar, var. e, Fichtel and Moll, Test. Micr., 1803, p. 74, pi. 12, figs 



a, b, c. 

 Robulina echinata d'Orbigny, Foram. Foss. Bass. Tert. Vienne, 1846, p. 100, pi 



4, figs. 21, 22. 

 Cristellaria (Robulina) echinata Carpenter, Parker, and Jones, Intr. Foram. 



1862, pi. 12, fig. 3. 

 Cristellaria echinata H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884 



p. 554, pi. 71, figs. 1-3.— Flint, Rep. U. S. Nat. Mus., 1897 (1899), p. 318 



pi. 66, fig. 2. 



Description. — Test close coiled, composed of comparatively few 

 chambers, biconvex, umbonate; sutures limbate, in the earlier 



