32 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
This species is one of the commonest in the region having been 
observed at more than forty stations during the dredging. It is sub- 
ject to some variation in its surface ornamentation but much less so 
than is the following species. It is one of the common species of the 
littoral zone of the whole Atlantic. 
Polystomella crispa (Linne). 
Nautilus crispa Linne, 1767, p. 1162. 
Polystomella crispa Lamarck, '22, p. 625, no. 1; Brady, '84, p. 736, pi. 110, 
figs. 6, 7; Flint, '99, p. 338, pi. SO, fig. 3. 
Although somewhat less common than the preceding, this species 
is frequently met with. It seems to be slightly more common in 
deeper water for it was found more frequently in material from the 
deeper parts of Vineyard Sound. There is a great variation in the 
surface characters of this species, much more so than is sho"\\Ti in the 
published figures. 
LITERATURE. 
(Only those works which are referred to in the synonymy are included 
here) . 
Bornemann, J. G. 
'55. Die mikroskopische faima des Septarienthones von Hennsdorf 
bei Berlin. Zeitschr. d. deutsch. geol. ges., vol. 7, p. 307-371, pi. 
12-21. 
Brady, H. B. 
'77. Supplementaiy note on the Foraminifera of the Chalk (?) of the 
New Britain group. Geol. mag., dec. 2, vol. 4, p. 534-536. 
'78. On the Relicularian and Radiolarian Rhizopoda (Foraminifera and 
Polycystina) of the North-Polar expedition of 1875-76. Ann. mag. 
nat. hist., ser. 5, vol. 1, p. 425-440, pis. 20, 21. 
'81. Notes on some of the Reticularian Rhizopoda of the Challenger 
expedition. III. Classification. Further notes on new species. 
Note on Biloculina mud. Quart, joum. micr sci., new series, vol. 21, 
p. 31-71. 
'84. Report on the Foraminifera dredged by H. M. S. Challenger, during 
the years 1873-1876. Challenger report, zoology, vol. 9. 
Carpenter, W. B., Parker, W. K., and Jones, T. R. 
'62. Introduction to the study of the Foraminifera. Ray Society, 
London. 
