560 Transactions of the Society. 
Abhandl. k. bayer. Akad. Wiss., Cl. II. vol. xviii. p. 271, pi. vi. 
figs. 3, 4. 
The typical form is represented only by a few examples from 
Station 6. The shell substance is composed of very small grains of 
sand, and the surface is smooth and of a light buff colour. There is 
a slight tendency to limbation of the sutures, or to a slight over- 
lapping of the chambers. 
It is reported from several ‘ Challenger ’ Stations in the Atlantic 
and in the South Pacific. Egger’s rather doubtful examples are from 
West Africa, Mauritius, and between New Amsterdam and Australia. 
Textularia concava var. heterostoma Fornasini, pi. VII. figs. 6, 7. 
Sagrina affinis Fornasini, 1883, Boll. Soc. Geol. Ital., vol. ii. 
p. 189, pi. ii. fig. 10. Sagraina affinis Fornasini, 1888, Boll. Soc. 
Geol. Ital., vol. vii. p. 45, pi. iii. fig. 1. Textularia heterostoma 
Fornasini, 1896, Mem. R. Accad. Sci. Istit. di Bologna, ser. 5, 
vol. vi. p. 4, pi. figs. 6, 12, 13. 
This is one of the many interesting forms of Textularia from the 
Italian tertiaries described by Signor Fornasini. It differs from the 
type in the peripheral margin, which is less square, and also in the 
position of the aperture. In T. concava the aperture is a slit with 
a raised border situated at the inner margin of the terminal chamber 
and parallel to the suture. In T. heterostomella the aperture is similar 
in character, but varies in its position. In the Italian specimens it is 
usually remote from the suture and placed obliquely to it at various 
angles. In the Malay form it usually reaches to the suture and is 
perpendicular to it. In the Malay Archipelago this is one of the 
most abundant and widely distributed of the Textularise. It is more 
coarsely arenaceous than T. concava ; and in one form (fig. 7) there is 
a considerable contortion of the test and a general resemblance to 
T. crispata. 
The Italian specimens are from the pliocene of Ponticello di 
Savena, near Bologna. 
Textularia sagittula Defrance. 
“ Polymorphum sagittula ,” Soldani, 1791, Testaceographiae, vol. i. 
pt. 2, p. 120, pi. cxxxiii. fig. T. Textularia sagittula Defrance, 1824, 
Diet. Sci. Nat., vol. xxxii. p. 177 ; Atlas, Conch., pi. xiii. fig. 5. 
T. sagittula (Defrance) Balkwill and Wright, 1885, Trans. R. Irish 
Acad., vol. xxviii. (Sci.) p. 332, pi. xiii. figs. 15-17. T. sagittula 
(Defr.) Malagoli, 1887, Boll. Soc. Geol. Ital., vol. vi. p. 520, pi. xiii. 
fig. 1. T. sagittula (Defr.) Brady, Parker, and Jones, 1888, Trans. 
Zool. Soc., vol. xii. p. 219, pi. xiii. fig. 1. T. sagittula (Defr.) 
Fornasini, 1888, Boll. Soc. Geol. Ital., vol. vii. p. 46, pi. iii. figs. 2-4, 
T. sagittula (Defr.) Chapman, 1892, Journ. R. Micr. Soc., p. 328, 
pi. vi. fig. 16. T. sagittula (Defr.) Egger, 1893, Abhandl. k. bayer. 
