440 
THE VOYAGE OF H.M.S. CHALLENGER. 
The genera which have been enumerated constitute an unbroken morphological series, 
with no lines of demarcation indicating the limits of the successive groups into which, for 
convenience, it has been divided ; and the relationship between the various types of 
structure is strengthened and further complicated by the existence of intermediate for ms , 
which present, in the same individual, the characters of two or more types. In this way 
Nodosaria is connected with Frondicularia by the dimorphous genus Amphimorphinci, 
with Rhabdogonium by Dentalinopsis, with Cristellaria by Amphicoryne, with Polymor- 
phina by Dimorphina, and with TJvigerina by Sagrina ; and in like manner Cristellaria 
is associated with Lingulina by Lingulinopsis, and with Frondicularia by Flabellina. 
Lastly, the genus Ramulina, which holds a position somewhat apart from the rest of the 
family, owing to its branching habit of growth, is nearly allied in all other respects to that 
section of the Nodosarice in which the segments are separated by narrow stoloniferous tubes. 
Sub-family l. Lageninse. 
Lagena, Walker and Boys. 
Orthoceras, pars, Soldani [1780]. 
Serptda (Lagena), Walker and Boys [1784], Adams, Kamnacher. 
Vermiculum, pars, Montagu [1803]. 
Serpida, pars, Maton and Rackett [1807], Pennant, Turton. 
Lagenula, Montfort [1808], Fleming, Macgillivray, Thorpe. 
Amygdalites, Costa [1828], 
Apiopterina, pars, Zborzewski [1834]. 
Miliola, pars, Ehrenberg [1839]. 
Oolina, d’Orbigny [1839], Reuss, Diesing, Czjzek, Costa, Egger, Terquem, Karrer, Kiibler and 
Zwingli. 
Cencliridium, Ehrenberg [1843]. 
Amphorina, d’Orbigny [1846 i], Costa, Seguenza. 
Lagena, Williamson [1848], Harvey and Bailey, Parker and Jones, Reuss, Giimbel, Carpenter, 
Stacbe, Brady, Karrer, Schwager, Hantken, Rymer Jones, &c. 
Entosolenia (Ehrenberg, MS.), Williamson [1848], Parker and Jones, J. W. Dawson, Alcock, 
Whiteaves, G. M. Dawson, Fischer, Bertbelin, Mobius. 
Fissurina, Reuss [1849], Bornemann, Egger, Karrer, Seguenza, Schwager, Schlickt, Terquem, 
Marsson. 
Ovidina, Ehrenberg [1854], Bornemann, Seguenza. 
Amygdalina, Costa [1856], Seguenza. 
Phialina, Costa [1856], Seguenza. 
Llolococmsl: Ehrenberg [1859]. 
Trigonulina , Tetragonulina, Obliquina, Seguenza [1862], 
Ovolina, Terquem [1866], 
Lagenulina, Terquem [1876], 
Capitellina, Marsson [1878]. 
In its essential features the genus Lagena presents the simplest and most elementary 
structure found in the hyaline series of Foraminifera. The test consists of a single 
