82 REPORT— 1880. 



1875. The Messrs. Young of Glasgow, after recording tlie opinions of 

 Mr. Btheridge/ describe Thamniscus '/ RanJcini, Young and Young, in- 

 serting between tlie generic and specific names a (?) ' Stems free, dicho- 

 tomous, circular, about ,^^ in. in diameter, branches in one plane. 

 Cells arranged in spirals. . . Cell-apertures circular when entire, oval 

 when worn ; lower lip prominent. . . Non-celluliferoas aspect finely 

 granulated, faintly striate.' . . ' The generic position of the fossil is 

 uncertain. . . IMeanwhile, though strongly disposed to regard this 

 fossil as a true Horner a, or a member of a closely allied genus, we think it 

 safer to leave it in the Palseozoic genus.' In this the Messrs. Young are 

 wise, but younger and less cautious observers, on the strength of the manj' 

 peculiar affinities which this species has to Hornera, would have eagerly 

 embraced this opportunity. I cannot, however, regard this species as a 

 Palseozoic Hornera, but I must candidly confess that it comes very near to 

 the generic description accepted by Busk.^ 



Glmiconome, Munster, Sy. Vincularia, Dei. 1829. Glauconome, Goldfuss, 

 1826. Revised by Lonsdale, 1839. (G. disticha Lonsdale, type of 

 D'Orb.'s Fenniretepora) ; Acanthocladia, King, 1849. 



It is very doubtful whether this term can be used for other than 

 PalaBOzoic Polyzoa. It was originally used by Munster for Cylindiical 

 forms, for the Glauconome marginata, Munst., in Goldfuss' Petrefac. of 

 Germany, is given by Hincks as a synonym of Gellaria fistnJosa, Linn. It 

 was, however, established by Goldfuss, and afterwards revised by Lonsdale. 

 M'Coy,' improving upon Phillips' ■* poor description does not make any 

 reference to the number of pores between the branchlets. In his later 

 work he defines the Genus more minutely thus : — 



' Corallum of a narrow central stem, with numerous pinnules, or 

 lateral branches uii connected with each other : both stems and branches 

 have two rows of cells on one face, which is usually carinated between 

 them, carina in some species tuberculated ; opposite face striated.' ^ 



In a paper read at the Nat. Hist. Soc, Glasgow, the Messrs. Young- 

 describe several new species of Glauconome. 



18/0. Glauconome marginalis. Young and Young. 



„ stellij^ora 



„ elegans 



„ as2yera 



„ flexicarinattt 



,, retroflexa 



,, laxa ,, ,, 



1877.^ ,, rol^usia „ „ 



1877. „ elegantula, R. Etheridge, Jun. 



In describing G. elegantula Mr. Etheridge defines and criticises the 

 genus Glauconome with especial reference to the Aranthoclodia.'' 



' A/i/i. and JSLuj. Nat. Hist., May, 187.5, p. iJ:?"), \i\. ix. J/.?. 



" 3[ar. Polyzoa, pt. iii. Cyclostomata, p. 10. 



^ Sy)i. Carh. Fos. Ireland. 



' Eetepora pluma, Geol. of Yorlish. 



•'' Brit. Palceozvic Fos. 



" Froc. Nat. Illft. Soo. of. Glas. 1878. Taper read 1877. 



' 'Notes on Carb. Polj-zoa,' Annals and Mat/. X. If. vol. I'l), 1877. 



