348 Mr. H. J. Carter's Contributions to our 



which relates to the surface, viz. " Cortex tenuior, stellas 

 minor es 3- ad 1-radiatas continens" which is the only cha- 

 racteristic of that form of Stelletta to which I have alluded as 

 being thus trenchantly distinguished from the chief cortical 

 element of a genuine Oeodia in this respect. Hence it be- 

 comes desirable either to transfer these to the Geodina, in 

 which case additional sections must be made for them, and 

 the distinguishing character of the Geodina above mentioned 

 is thus rendered useless ; or to extend the diagnosis of the 

 Stellettina so as to include them in the latter. Formerly I 

 thought that the discophorous Stellettce should form a part of 

 the Geodina, and so proposed that they should be added to 

 Pachymatisma and Caminus ( c Annals/ 1880, vol. vi. pp. 136, 

 137), for reasons then mentioned; but now that I have had 

 to consider the relationship of these two groups more closely, 

 it seems to me that they had better remain where Schmidt 

 placed them, viz. under the genus Stelletta — -that is, with 

 the Stellettina. Thus the diagnosis of the latter would still 

 remain as stated in my classification {op. et loo. cit.) unless 

 it should be considered desirable to add to the end of it the 

 following words— u viz. discoid, bacilliform, or globostellate 

 bodies," so as to include the species above mentioned. 



The subdivision which I have proposed for the Geodina 

 equally applying to the Stellettina, we have thus to add to 

 it for the latter that which follows, viz. : 



Subsection 1. 



Thin-skinned Stellettce, (Psilodermata.) 



a. Cortex thin or next to nothing, charged more or less 



with minute stellates only. {Stellifera.) 



b. Cortex the same, but charged with bacilliform bodies 



chiefly. (Bacilli/era.) 



Subsection 2. 



Thick-skinned Stellettce. (Pycnodermata.) 



a. Cortex thick, charged with discoid bodies. (Disci/era.) 



b. Cortex thick, charged with globostellatus. (Globo- 



stellata.) 



As regards " Subsection 1, a," and generally throughout 

 the Stellettina, the stellates are' thin and delicate, so that the 

 fragment under microscopic examination, even in liquor 

 potass®, requires to be kept theie some time before they will 

 make their appearance, and thus are only satisfactorily seen 

 when it is mounted in Canada balsam. This is particularly 

 the case with those of the interior, where the rays are still 





