BY R. ETHERIDGE, JUNR.^ AND JOHN MITCHELL. 679 



EnCRINDRDS (?) ETHERIDGEf, Mil. 



Fig. 10. — An almost completely testiferous specimen ( x2), with continuous 

 axial annulation. and thirteen pairs of pleural segments. Found 

 associated with the cephaluu represented in Fig. 8, and tentatively 

 is placed specifically with it ( X 2). Bowniug. Coll. Mitchell. 



Fig. 11. — A side-view of another pygidium of the same species showing 

 thirteen pleural segments. Eowning. Coll. Mitchell. 



Plate 1 



VI. 



EnCRINDRUS ROTHWEI.LiE, E. db M. 



Fig. 1. — An almost complete individual; the free cheeks are absent, and 

 the artist has incorrectly shown the eyes apparently present; also 

 the pleural lobes of the thorax are too intensely spread marginally; 

 otherwise it is a good figure. Bowning. Coll. Mitchell. 

 Fig.3. — Aside-view of anotiier specimen to show the rather prominent 

 axis. Bowning. Coll. Mitchell. 



ExcRrNDRDS MiTCHELLi, Foerste. 

 Fig. 2. — A very fine specimen, complete except the free cheeks. Bowning. 

 Coll. Mitchell. 



Encrinurus SILVERDALENSIS, E. cO M. 

 Fig 4. — A nearly complete specimen of an almost mature individual. 



Silverdale. Coll. Mitchell. 

 Fig. 5. — A large pygidium showing seven tubercles distinctly on the 

 central area of the axis, and the eighth faintly. Silverdale. Coll. 

 Mitchell. 

 Fig. 6. — A portion of a cephalon of a mature individual sliowing the general 

 tuberculation, the large lateral tubercles of the glabella, the stout 

 neck-ring and its lateral extensions, and the rounded, thickened, 

 and tuberculate genal angles. [See PI. liv., fig. 11, of the same 

 specimen]. Silverdale Coll, Mitchell. 

 Fig. 14. — Another pygidium. 



Encrinurus s/).(?), undet. 

 Fig. 7. — Imperfect cephalon, undet. Bowning. Coll. Mitchell. 



Encrinuru.s bowningensis, Foerste. 

 Fig.8. — An imperfect cephalon, which shows the tuberculation of the 

 glabella. 



Encrinurus (?)etheridgei, Mit. 

 Fig.9. — Free cheek with prominent conoid eye. Bowning. Coll. Mitchell. 



Encrinurus mitchelli, Foerfite. 

 Fig. 10. — Hy postome. 



Encrinurus duntroonensis, E. d; M. 

 Fig. 11. — Right half of a cephalon showing all the features referred to in 

 the description. 



