128 
LapWorth — Graptolites of Co. Donw. 
4- Sp. 2. Monograptus spiralis. Geinitz. (Leon & Bronn, Jahrbuch, fur. 
Min. 1842. PI. 10.) PI. 5, fig. 12. 
This species is usually identified with Prionotus convolutus of Hisinger, but 
according to Dr. Linnarsson (1.) the latter was originally founded upon a specimen 
of Rastrites peregrinus (Barr. ). Locality — Tieveshilly. 
5- Var .(a), fimbrialus. Nich. PI. 5, fig 17. Locality— Coalpit Bay. 
6. Var. (b). communis. Lapw. PI. 5, fig. 16. 
The two preceding forms are certainly most intimately allied. The latter 
has an extended range, and varies much in the forms of the polypary and hy- 
drothecas, and seems to pass into the following form, M. fimbriatus, on the 
other hand, is very local in its distribution, and constant in its general features. 
Locality — Coalpit Bay. 
7* Var ( c). proteus (?). Barr. PI. 5, fig. 18. 
It is doubtful if this form is actually identical with Barrande’s species. His 
figures remind one rather of M. crispus (Lapw.); and the group typified by 
M. lobiferus (M ‘Coy). Locality— Coalpit Bay. 
8. Sp. 3. Monograptus Sedgwicki. Portl. PI. 5, fig. 15. Locality— Coalpit 
Bay. 
9- Sp. 4. Monograptus turriculatus. Barr. PI. 5, fig. 11. 
As in South Scotland, the majority of the specimens of this species in the 
beds of County Down are of very diminutive size. Locality — Tieveshilly. 
10. Sp. 5. Monograptus crispus. Lapw. PI. 5, fig. 13. Locality — Tieveshilly. 
11. Sp. 6. M onograptus exiguus. Nich. PI. 5, fig 9. Locality— Tieveshilly. 
12. Sp. 7. Monograptus Barrandei . Suess. PI. 5, fig. 21. Locality — 
Tieveshilly. 
13. Sp. 8. Monograptus runcinatus . Lapw. PI. 5, fig. 7. Locality — 
Tieveshilly. 
(1.) Linnarsson. Afdreg ur Gcologiska Foreningensi Stockholm Forhandlingar, 1877. No 
40. Band III. No. 12. 
