572 
THE VOYAGE OE H.M.S. CHALLENGER. 
u. Riigen, Jahrg. x. p. 150, pi. ii. fig. 19) Marsson has figured an interesting varietal 
modification of the present species, in which the costae are less prominent and are confined 
to the inferior portion of the chambers. His specimens were from the Cretaceous beds of 
the Island of Riigen. The form recorded by Wright as “ Polymorphina regina, var.” 
(Report and Proc. Belfast Nat. Field Club, 1873-4, App. p. 86) from the Chalk of the 
north-east of Ireland, belongs to the same variety. 
Polymorphina longicollis, H. B. Brady (PI. LXXIII. figs. 18, 19). 
Polymorphina lanceolata, pars, Renss, 1870, Sitzungsb. d. k. Ak. Wiss. Wien, vol. lxii. p. 487, 
No. 12. — Scklickt, 1870, Foram. Pietzpuhl, pi. xxxi. figs. 25-28, &c. 
„ longicollis , Brady, 1881, Quart. Journ. Micr. Sci., vol. xxi., N.S., p. lxiv. 
Test elongate- ovate, subcylindrical, or fusiform ; segments few, three to five visible 
externally, erect, slightly inflated ; surface more or less hispid, rarely smooth ; the final 
segment, which is generally more inflated and more setose than the. rest, terminating in a 
long apertural neck with everted and sometimes radiate lip. Length, ^gth inch 
(0’6 mm.). 
This is an exceedingly interesting connecting link between the genera Polymorphina 
and Uvigerina. The general conformation of the shell is that of Polymorphina, whilst 
the long neck and phialine lip are typically Uvigerine features. 
The morphological characters of the test are tolerably constant, but the condition of 
the exterior varies a good deal. Sometimes the entire surface is hispid, as in fig. 19 ; 
sometimes, on the other hand, it is smooth and devoid of spines ; but in the majority of 
cases the earlier portions are smooth or nearly so, and only the final segment presents a 
setose exterior. 
Polymorphina longicollis is essentially a deep-water Foraminifer, and the number of 
specimens found in any one locality is as a rule very small. It has not hitherto been met 
with at a less depth than 1100 fathoms. The following is the record of its distribution : 
— North Atlantic, three Stations, 1125 fathoms, 1476 fathoms, and 2435 fathoms 
respectively, at the last-named depth the specimens were non-spinous ; South Atlantic, 
Station 338, depth 1990 fathoms, the best examples of the species; South Pacific, four 
Stations, depth 1375 fathoms, 1825 fathoms, 2075 fathoms, and 2425 fathoms respec- 
tively. 
Amongst von Schlicht’s illustrations of the Foraminifera of the Septaria-clay of 
Pietzpuhl ( loc . cit.), are three or four figures of smooth-shelled specimens which may 
without any doubt be assigned to this form. They are referred to by Prof. Reuss 
as “ Polymorphina lanceolata, mit rohrenformiger und am Encle kurz verastalter 
Mundung.” 
