548 TROF. T. E. JONES ON SOME DEVONIAN AND 



it differs from both ; and, well deserving a specific name, I dedicate 

 it to the memory of the ardent and industrious palaeontologist of 

 the Geological Survey of Canada, who devoted much time to the 

 fossils of Anticosti. 



It is from the Clinton or j^iagara Formation, Division 2 of the 

 Anticosti Group, west of Jupiter Kiver, Anticosti. Coll. Dr. G. J. 

 Hinde, F.G.S. In a compact, thin, grey limestone, composed of 

 small organisms, and showing P. Billingsii and some obscure forms 

 on one of the bed-planes. 



IV. BoLLiA, J. and H. (See also page 540.) 



17. BoLLiA SEMiLUNATA, sp. nov. (PL XXI. figs. 9 r/, 9 l.) 



Length 'GS mm. ; height '54 mm. ; thickness '32 mm. 



In this little species the horse-shoe lobe is neat, nearly symme- 

 trical, and relatively strong, being thick and high, not reaching 

 below the middle of the valve, but touching each end of the hinge- 

 line. The outline of the valve is more than half a circle, — that is, 

 it is nearly two-thirds of an irregular disc, the hinge-line being its 

 cut edge. The marginal ridge along the free border is strong, but 

 thicker at one end than at the other ; and the clear crescent-shaped 

 space between it and the curved lobe is very distinct. 



Prom the Cincinnati Formation ; Division 1 of the Anticosti 

 Group (Billings), South of Junction Cliff, Anticosti, attached to a 

 small Brachiopod. Coll. Dr. G. J. Hinde, F.G.S. 



X. Bythocypris, G. S. Brady, 1880. 

 (See 'Ann. & Mag. Nat. Hist.' March 1887, p. 184.) 



18. Bythocypris? Lindstecemii, sp. nov. (PI. XXI. figs. 11 «, 



lift, lie.) 



Length 1*2 mm. ; height -6 mm. ; thickness -48 mm. 



In outline and contour this Cypridoid Ostracode (from Billings's 

 Division 1 of the Anticosti Group ; south of Junction Cliff, 

 Anticosti. Coll. Dr. G. J. Hinde, F.G.S.) nearly resembles the 

 smooth oblong-ovate Bythocypris symmetrica^ Jones, ' Ann. & Mag. 

 Nat. Hist.' ser. 5, vol. xix. p. 186, pi. vii. figs. 3, 4, & 7 ; but it is 

 larger, and tapers more suddenly at the anterior third. Being 

 so far different, it may have a distinct name — Lindstecemti, after 

 my friend the eminent Swedish Palaeontologist, Professor Gustav 

 Lindstrom, F.C.G.S., of the State Museum, Stockholm, who has 

 taken great interest in this branch of Carcinology. 



Several specimens, somewhat variable in outline, occur attached 

 to small Corals and Brachiopods. 



XI. Bairdia, M'Coy, 1844. 



19. Bairdia anticostiensis, sp. nov. (PL XXI. figs. 3 a, 3 6.) 



Length 2-0 mm. ; height '8 mm. ; thickness '9 mm. 

 An elongate, subrhomboidal, very convex, smooth form; slightly 

 arched on both ventral and dorsal border, but the latter suddenly 



