13 
British species of the genus Lagcna. 
tervening form between the figures 1 and 3. It is one of the most 
elegant of the Lagenulce. 
Long. 
Diam, 
1 
1 
40 • • ' 
|o 
|co 
1 
1 
■ • T70 
1 
1 
45 • • 
• • 2 00 
Oxwich, Sandwich, Oban, J. G. Jeffreys, Esq. Boston; March. 
2. Lagena gracilis, nob. PI. I. fig. 5. 
In form this species bears a very close resemblance to the L. 
Icevis, var. Amphora, from which it differs chiefiy in having its 
sm’face marked by longitudinal striae, which are well defined over 
the greater part' of the cell, becoming less distinct towards the 
upper portion. If we consider this as only another variety of the 
Amphora, it will become necessary to regard all the forms of 
L, striata merely as states of L. Icevis, of the propriety of which 
view a suspicion has more than once crossed my mind when ex- 
amining some specimens of the var. semistriata. For the pre- 
sent I have thought it better, having seen several specimens of 
it, to give it a distinct name. If this suspicion should ultimately 
prove to be correct, L. gracilis will bear the same relation to 
L. striata and its var. perlucida that the var. Amphora does to 
L. Icevis. 
Long. 3 -V ; diam. 
Boston : very rare. 
3. L. striata. PI. I. figs. 6 & 8. 
Serpula {Lagena) striata, Walker, p. 2. tab. 1. fig. 6. 
Vermiculum striatum, Mont. Test. Brit. p. 523. 
Serpula striata, Turton, Conch. Diet. p. 157. 
Lagenula striata, Fleming, p. 234. 
Cell ovato-claviform or spherical, with numerous parallel lon- 
gitudinal costae or lamellae, which generally run nearly from one 
extremity to the other, only not usually reaching the apex inte- 
riorly but terminating abruptly, forming a small circular coronal 
(see fig. 7) . These costae are sometimes very thin and lamelliform, 
but more commonly obtuse and rounded. The cell surmounted 
superiorly by a long tubular neck terminated by a narrow rim 
encircling the small round oral ? orifice. 
Nothing can be much more variable than the conditions under 
which this species presents itself. In small young specimens 
alone is the tubular neck found perfect, and these are usually 
either transparent and hyaline or of a pale bluish white. On the 
other hand, the specimens usually seen in the cabinets of concho- 
logists are strong, globular, of an opake dirty white, the rounded 
costse alone remaining semitransparent, and wuth very imperfect 
