108 Mr. J.G. Jeffreys on British Odostomiz. 
their being arranged at shorter distances. The same botanist 
also observes, that “two branches of each whorl are almost 
constantly compound,” and this character I have taken the 
liberty of inserting im other words in my observations on this 
plant. The remainder of his paper accords with my own obser- 
vations, with exceptions which have been already noticed. I have 
however frequently found this plant in stagnant pools, and can- 
not as yet discover that either of the three affects peculiar situa- 
tions. 
There is only one more remark to be made, and this respecting 
the suspected hybrid origin of the plant; Mr. Purchas seems to 
imply that I held that opinion, but in my original but unpublished 
paper it was expressly stated that my convictions were that it could 
not be a hybrid, and the plant was therefore considered by me as 
a species ; the unfortunate choice of a name has not unnaturally 
conveyed a wrong impression of my views. 
XII.—Supplementary Notes on British Odostomiz. 
By J. G. Jerrreys, F.R. & LS. 
Since the publication of my paper on this subject in the ‘ An- 
nals of Natural History’ for November 1848, the discoveries of 
that indefatigable conchologist Mr. Barlee, and the communica- 
tions of other scientific friends, have induced me to notice the 
following additions of species and localities :— 
Odostomia pallida var. a. Guernsey, Mr. Barlee. 
Var. 6. Loch Fyne, A. MacNab. 
O. Rissoides var. b. Lerwick, Mr. Barlee. 
O. alba var. a. This has been lately found by Mr. Alder on 
the coasts of Northumberland and the Isle of Man, and described 
by him in the Transactions of the Newcastle Naturalists’ Club, 
under the name of O. fulva. It appears to attain a greater size 
than any other of the true Odostomie. 
O. nitida monstr. Lerwick, Mr. Barlee. 
O.albella var.a, minor, sutura profundiore. Lerwick, Mr. Barlee. 
O. acuta. In this species, as well as plicata and unidentata, 
may be detected, by the aid of a good magnifying glass, faint but 
regular spiral striz. 
O. turrita. Birtabuy Bay, co. Galway, Mr. Barlee. 
O. cylindrica. Lerwick, Mr. Barlee. 
O. plicata var. a. Northumberland coast, Professor King. 
Guernsey ; Burrow Island; Mr. Barlee. 
O. unidentata. Arran Island and Birtabuy Bay, co. Galway ; 
Burrow Island ; Mr. Barlee. 
