THE SHORE-SAND AT BOGNOR, SUSSEX. 203 



Trochammina inflata, Montagu, sp. 



Nautilus inflatus, Montagu, 1808, Test. Brit. Supply p. 81, 



pi. xviii., fig. 3. 

 Trocliammina inflata, Brady, 1884, Report " Challenger^ p. 338, 



pi. xli., fig. 4, a — c. 

 „ „ Brady, 1887, Synopsis British Recent 



Foraminifera. 



Common. The specimens are very fine and strongly built, and 

 much larger than those which I obtained at Hampton, near 

 Whitstable, in Kent. Brady states that the species is rarely 

 met with, except in brackish waters, but many of the specimens 

 have every appearance of having lived in the neighbourhood 

 where they were gathered, the sarcode being still visible in many 

 broken shells. 



Trochammina inflata, var. macrescens, Brady. 



Trochammina inflata, var. macrescens, Brady, 1870, Ann. and 



Mag. Nat. Hist., ser. 4. vol. vi., p. 290, 

 pi. xi., fig. 5. 



Rare. Brady regards this as merely a depauperated form 

 of T. inflata, due to existence in brackish pools, where the pro- 

 portion of mineral constituents is so small that the animal is 

 unable to secrete a firm shell. The test thus becomes little more 

 than a chitinous envelope, so thin that the inflated contour 

 of the segments is lost when the specimens are taken out of fluid 

 and dried. 



It is difficult to understand how such a fragile shell can have 

 been transported many miles, such as would be required to meet 

 the conditions required in the above hypothesis, without being 

 entirely destroyed. 



Trochammina robertsoni, Brady. 



Trochammina robertsoni, Brady, 1887, Journ. R. Micr. Soc., pt. vi., 



p. 893. 

 J. Wright, 1890 — 1, Proc. R. Irish Acad., 

 3rd ser., vol. i., No. 4, p. 469, pi. xx., 

 fig. 4, a, b. 



One specimen only found by Mr. Wright. 



Journ. Q. M. C, Series II. —No. 57. 15 



