6 ]\CK'>0^, Deposit of the LcK'cr Batm Valley. 



N(iru'?ila ( Diploids ) clliptica Kiitz. 



„ (Neidiuvi) Iridis Ehr. 

 Gomphoyiema gemmatuvi (Lyngb.) Ag. 

 Stauroncis Plioenicentron Ehr. 

 Cyvibclla EJirenbergii Kiitz. 



„ aspcra Ehr. = {C. gastroidcs Kiitz). 



„ Innceolata var. cormita, Ehr. 

 Cvniatoplcura clliptica lireb. 



„ hibernica W'ln. Smith. 



StepJianodisciis astrea Grun. 

 Melosira Normanni Arnott. 



III. Description of the Prehistoric Imtlements. 



a. Implevioits of I'liiit. 



By far the most abundant implements found in 

 working the diatom deposit at Culbane and other places 

 in the Bann valley consist of flint, and ma\' be roughly 

 divided into several classes. The respective terms, how- 

 ever, applied to them, as well as to the succeeding series 

 of implements, are intended more to assist in their 

 classification than to determine the uses to which the)- 

 were applied. 



Flakes. — Flint flakes appear to be the most numerous ; 

 they have been found in large quantities in the deposit 

 near Culbane. Some thousands have also been discovered 

 in the neighbourhood of Toome, but the majority of 

 these were obtained from the supposed crannoge-sites on 

 Toome Bar (Day '67, and h'.vans '68). 



The Darbishire and Bell collections contain examples 

 from each of these localities. The flakes are of all sizes, 

 long and short, narrow and broad, and vary considerably 

 in thickness. They vary in length from i inch to as 

 much as 5 or 6 inches. Some examples present little or 

 no secondarj- working, while others exhibit a considerable 



