Mr. C. C. Babington on British Plants. 427 



Foss. du Bassin Tert. de Vienne/ Both are marginoporous, and 

 both without pores on the surface (Carpenter, Quart. Geol. 

 Journ. vi. p. 31) ; while the concentric circles represented in 

 D'Orbigny's Cyclolina cretacea {loc. cit.) find their parallel also 

 in Lamarck's Orbitolites concava. Carrying out this reasoning 

 also, we find it stated by Dr. Carpenter {loc. cit.) respecting the 

 Australian species of Quoy and Gaimard and Orbitolites compla- 

 nata, that they " agree closely in every particular save the form 

 of the superficial cells ; " and as the former and Orbitolites Mala- 

 harica will be seen to be still more intimately allied, it also 

 follows, that all these species should come under the genus 

 Orbitolites of Lamarck. The chambers I apprehend are arranged 

 spirally in all, though the superficial lines only appear to be so in 

 O. Malabarica. 



It therefore seems to me (though of course I make the remark 

 with much deference) that D'Orbigny's genus Cyclolina should 

 be a species in Lamarck's Orbitolites; then the latter genus 

 would be characterized by a thin amorphous incrustation on the 

 surface through which the chambers are more or less visible 

 with a magnifying glass; and in D'Orbigny's Orbitolina, the 

 incrustation would be characterized by its cellular structure, as 

 in Orbitoides, rendering the species or varieties more or less 

 convex on one or both sides. In this case the species in the 

 " Descriptions, &c." to which I have alluded, called respectively 

 Cyclolina- and Orbitolites, should be called Orbitolites and Orbi- 

 tolina. 



Bombay, February 26, 1853. 



EXPLANATION OF PLATE XVI. B. 



Fig. 1 . Orbitolites Malabarica, natural size. 



Fig. 2. Portion of the centre magnified, showing the spiral arrangement of 



the chambers. 

 Fig. 3. Portion of the margin magnified, showing the marginal apertures. 

 F^g. 4. Portion of the internal, or opposite, side of the rows of chambers, 



showing similar apertures ; — also the large oblong or ovoid chambers 



of the surface. 



XXXIX. — Remarks upon British Plants. 

 By Charles C. Babington, M.A., F.U.S., F.L.S. &c.* 



[Concluded from p. 368.] 



6. Myosotis alpestris. 



Having had occasion to refer to the Myosotis alpestris, it may be 



allowed, and indeed seems desirable, to take this opportunity of 



* Read before the Botanical Society of Edinburgh, April 14, 1853. 



28* 



