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represent an elongated tapering test, nearly circular in transverse section, and rough 
externally. The species is minutely described by Moebius ( loc . cit.) ; and the calcareous 
lining of the test as well as the tubulated structure of the outer walls are excellently 
illustrated in his drawings. The chamber-cavities are either simple, or partially sub- 
divided by irregular secondary septa. 
In its normal condition the pseudopoclial orifice is a curved or straight fissure at the 
inner margin of the terminal segment, close to the line of union with the penultimate. 
In rare instances the aperture is porous, as shown in fig. 3. 
Fig. 12 represents a specimen which has been broken and repaired, the surface of 
which is traversed by partial longitudinal costae. Superficial ornament of any sort, 
distinct from mere sutural limbation, is a rare feature amongst the Textularice, and in the 
present case it is of particular interest in connection with certain Carboniferous fossils 
(. Textularice and Bigenerince), figured by von Moller under the names Cribrostomum 
elegans, Cribrostomum eximium, Cribrostomum commune, &c. (Mem. de l’Acad. Sci. St.- 
Petersb., ser. 7, vol. xxvii. No. 5, pis. iii. iv.), which exhibit a similar form of decoration. 
In some localities, especially about the coral-reefs of the tropics, much elongated, 
subcylindrical, arenaceous Textularice, such as that portrayed in PI. XLIII. fig. 4, a.b., 
are very common. The test consists, as a rule, of a large number of segments, and tapers 
very gradually towards the aboral end, but in other respects the characters are those of 
the typical form. This variety may be distinguished as Textularia agglutinans, var. 
porrecta. 
Textularia agglutinans is distributed over the whole world, without much reference to 
the depth of the sea-bottom, its bathymetrical range extending from 5 fathoms to 3125 
fathoms. 
It is difficult to fix the earliest appearance of the species as a fossil, owing partly to 
the similarity in general contour of a number of forms which are known under different 
names, and partly to the effect of infiltration and external agencies in obscuring the minute 
structure of arenaceous tests. Parker and Jones state, in general terms, that it occurs 
amongst the microzoa of the secondary formations, but the earliest formation from 
which there is any distinct record of its having been obtained is the Eocene clay of the 
London Basin. It has been found in the Oligocene of Gaas, near Dax (Reuss), in the 
Miocene “ Leythakalk,” of West Slavonia (Karrer), in the Pliocene of Italy (Parker and 
Jones), in the Crag of the east of England (Jones, Parker, and Brady), and in the Pleis- 
tocene of Sicily (Seguenza). 
Textularia luculenta, n. sp. (PI. XLIII. figs. 5-8). 
Test compressed, tapering ; oral end rounded or truncate, aboral extremity obtusely 
pointed ; peripheral edges rounded, irregular or slightly lobulated. Segments numerous, 
