FAUISTA OF THE ST. JOHN GEOUP. S3 



PEOTOPELTURA (sub. gen.), Brogger. 

 Protopeltura acanthura. Augliu. 



Clcnus (.') acantliurm. Aug. ' Pal. Scand.,' p- 44. Tab. xxv, Cg. 7. 



Protopeltura acanthura- Brogg. 'Siluriscli. Etag., 2 und 3,' p. 106. Tab. i, fig. 14. Tab. ii, tig. 13 a. 



Var. tetracantkura, n. var. (PL XIII, figs. 8 a-c.) 



This form is near Oleiius acanthurus, but differs in the following respects : 



Middle piece of the head. — In this the glabella is larger in proportion, and comes in 

 contact with the anterior marginal fold. 



Movable cheek. — This is proportionately longer. 



Pygidium. — This is proportionately longer and narrower ; in place of three joints in 

 the rachis it has four, and the three anterior joints bear tvibercles ; in the place of three 

 spines on the margin of the pygidium on each side, there are only two, one at the anterior 

 angle of the pygidium and the other half way to the distal end ; a pair of furrows 

 on the surface of the pygidium are bent and run toward each of these spines. 



Sculpture as in P. acanthura ; there are wrinkles diverging from the ocular fillets to 

 the anterior marginal fold. 



Size. — Middle piece of the head, length, 6 mm. ; width, 9 mm. Movable cheek, 

 length, 8 mm. ; width 2h mm. Pygidium, length, exclusive of the spines, 5 mm. ; 

 width, 8 mm. 



Horizon and Locality. — In the black shales of Division 3 i. Navy Island. 



A head similar to this is found in Division 3 a at Grermaine street, St. John, but the 

 pygidium is not known. 



This variety and P. acanthura are remarkable for their large pygidia. 



PELTURA, Milne Edw. (1840). 

 Peltura scarabeoides. Wahl. (PI. XIII, figs. 9 a and b.) 



lS21—Entomoslracites scarabeoides. Wahl. ' Petrif. Tell. Suec.,' p. 41. T. i, fig. 4. 



1822 — Paradoxides scarabeoides. Brongn. ' Hist. nat. des Crust, foss.,' p. 34. T. iii, fig. 5. 



1827 — Olenm scarabeoides. Dalm. ' Om palœaderma K. Yet. Akad. Handl. 182(3,' p. 72. 



1840— Pf/(oi(ra scarabeoides. Miln. Edw. ' Hist. nat. des Crust.,' torn, iii, p. 344. 



1847 — Peltura scarabeoides. Corda. ' Prodr. einer Monog. der Bôhm- Trilob.,' p- 127. T. vi, fig. 68. 



1854 — Peltura scarabeoides. Ang. ' Pal. Scand.,' p. 4.5. T. xxv, fig. S. 



1854 — Anopocare pusillum. Ang. ' Pal. Scand.,' p. 50. T. xxvii, fig. 1 a. 



1884 — Oleiius scarabeoides, var. obems. Salt, ' Mem. Geol. Surv. G. B., Dec. x!.' T. viii, fig-3, 1-4 and ."i. 



ISËG—Olenus scarabeoides. Salt. ' Mem. Geol. Surv. G. B.,' vol. iii, p. 301. T. v, figs. 2-5. 



1871 — Conocephalites Malvernensis. Phil. ' Geol. Oxford,' p. 68, fig. 5. 



1871 — Olenus scarabeoides. Phil. Loc. cit., p. 6S, fig. 6. 



Remains of this species occur sparingly in the black slates of King-street and of Navy 

 Island at the horizon Division 3 b. It has been found more plentifully in Cape Breton. 



Leptoplastcjs. Angelin. 



An example of this peculiar genus of trilobites, rare outside of Scandinavia, has been 

 found in Division 3. 



