42 HENRY B, BRADY. 
tric layers; the chambers occupied to a great extent by 
labyrinthic or cancellated shelly growths. 
For the present I know of no more appropriate place than 
this for Parkeria, Loftusia, and their immediate allies. It 
may be admitted that we have still a great dea] to learn 
concerning them, and should the Stromatoporide be proved 
eventually to occupy an intermediate position, related on 
the one side to Rhizopods, on the other to Sponges, possibly 
these types may find their proper place as a further 
connecting link on the Rhizopod side. 
D. Tests of the larger species arenaceous, either with 
or without a perforate, calcareous basis; smaller forms 
hyaline and conspicuously perforated. 
VI. TextruLarip#.—I can see no advantage in the attempt 
to separate the arenaceous TZeztularie and Bulimine from 
the clear-shelled species, but much the contrary; nor can I 
recognise any valid distinction, of more than secondary 
importance, between Zextularia and Valvulina} 
E. Test calcareous, finely perforate. 
VII. CurLostomMELLID#.—With Reuss’s genera Chilosto- 
mella and Allomorphina, which together form his family 
Cryptostegia, I have associated Seguenza’s genus Ellipsovdina. 
The anomalous characters of the latter, viewed as a Nodosa- 
rian, I pointed out many years ago, and had I then known 
the genus Chilostomella by anything more than figures, I 
should have suggested the present position for it. The 
primary difference in the structure of these two types consists 
in the fact that in Chzlostomella the segments alternate, the 
attachment to each other being at one side, and the aperture 
first at one end and then at the other, whilst in Ellipsoidina 
the attachment is at the base, the segments grow in the same 
direction, and consequently the aperture is always at the 
same end. 
VIII. Lacrenip#.—This is exactly coextensive with the 
Lagenida of Messrs. Carpenter, Parker, and Jones. 
F. Test calcareous, generally very coarsely perforated, no 
trace of canal-system. 
' T arrived at this conclusion originally from the study of the Carboni- 
ferous types of Rhizopoda; meanwhile my friend Mr. Carter had come to 
the same result, from working on recent species. Vide, ‘Ann. and Mag. 
Nat. Hist.,’ ser. 4, vol. xix, p. 205. The close affinity of Zertularia 
with Valvulina is fully recognised by Dr. Carpenter and his colleagues 
(‘ Introd.,’ p. 192), though the two genera are widely separated in their 
scheme of classification, 
