12 
Mr. W. C. Williamson on the Recent 
tagu. Lagenula, De Montfort, Fleming, MacGillivray. Miliola, 
Ehrenberg. 
Cell calcareous, single, globular, ovate or cylindrical, with a 
long produced external tubular neck projecting from the upper 
extremity. Internal cavity simple. 
1. Lagena Icevis. PI. T. figs. 1, 2. 
Serpula {Lagena) leevis ovalis, Walker, Test. Min. Rar. p. 3. t. 1. 
fig.9. 
Vermiculum leeve, Mont. Test. Brit. p. 524. 
Serpula l^vis, Turton, Conch. Diet. p. 157. 
Lagenula Icevis, Flem. British Animals, p. 235 ; MacGillivray, 
Molluscous Animals of Scotland, p. 38. 
Cell ovate or claviform, sometimes narrow and much elongated, 
having a long slender tubular neck somewhat contracted near its 
apex, surmounted by a narrow rim, surrounding a small circular 
oral ? orifice, smooth and shining, sometimes white, but more 
frequently transparent and hyaline, or with a delicate tint of 
bluish white : under a high magnifier its surface appears crowded 
with very minute foramina. 
In its usual form, with the exception of the terminal rim, this 
delicate object bears the closest resemblance to a Florence flask. 
Fig. 2 represents a longitudinal section. 
Long. 
1 
50 • 
1 
88 • 
Diam. 
_i_ 
2 2 0 
1 
T8T 
Long. 
THo 
1 
107 
Diam. 
1 * 
• 2 30 
•25 0 
Scarborough, very rare, W. Bean, Esq. Swansea, Sandwich, 
J. G. Jeffreys, Esq. Adhering to Fuci, and among the byssi of 
Modiola barbata, on the Girdleness at Aberdeen,^^ Prof. MacGilli- 
vray. Boston, Lincolnshire ; March, Cambridgeshire. 
L. Icevis, var. a. Amphora, nob. Figs. 3, 4. 
Cell elongated, cylindrical ; some examples having the form of 
L. Icevis, with the addition of a long tapering mucro at the base ; 
others being much more lengthened and fusiform, as in the 
figure. The majority of specimens exhibit a medium form, the 
greatest diameter being at the lower third of the cell. Neck 
long, slender, tapering, surmounted by a small rim surrounding 
the circular orifice. Texture and hue like L. Icevis, of which I 
believe it to be only a variety, as I have found almost every in- 
* In order to give a correct view of the variable dimensions of these ob- 
jects, I have selected several specimens and given the length and breadth of 
each individual in fractional portions of an inch. The dimensions of all 
the species, as described by preceding writers, are very much larger than 
in any examples which have come under my notice and are surely inac- 
curate. 
