THK FAUNA OF THE ST. JOHN (IKOUP. 81 



and a half times louger than the facial suture in front of it, and three times greater than 

 the part of the suture behind it. 



The free cheek of this species is described in Trans. Koy. Soc. Can., Vol. I. See. iv. p. 

 272, No. 5. See also Fig. 8, on Plate X. 



Sculplure. The anterior marginal fold is traversed by numerous, fine, longitudinal, 

 frequently anastomosing, raised lines ; .similar fine, raised lines are found on the surface of 

 the glabella, except in the furrows, where the surface is punctate ; the raised lines on the 

 glabella are rudely parallel to its front and sides, and in well preserved examples, in which 

 the head is about 25 mm. in length, are just visible to the naked eye. The fixed cheeks are 

 rugulose with irregiilar, rounded, reticulating elevations ; and the furrow dividing the 

 cheek from the e5a^lobe is covered with minute tubercles. 



Length of the head-shield of the largest individual observed, 60 mm. Widlh between 

 the sutures, aboiit 80 mm. 



Horizon and Localii//. In the grey shales of Div. l.c, at Portland and at Hanford 

 Brook, St. Martin's. Frequent. 



In concluding the present pajier on the St. John fauna, the author takes pleasure in 

 acknowledging his obligations to several gentlemen for assistance received. To Professor 

 Alpheus Hyatt, for aid in investigating the Pteropoda ; to Mr. C. D. Walcott, for similar 

 assistance with some of the I'rachiopoda. Professor Jules Marcou has very kindly allowed 

 me the use of a number of pamphlets describing the Scandinavian fossils of the Paradoxides 

 beds, and I have been further aided in a comparison of our forms with those of Scan- 

 dinavia by the gift of pamphlets on the Cambrian formation of that region from Dr. 

 Lindstrom and Professor T. Kjerulf To Professor T. Rupert Jones, I am under obligation 

 for information relative to the Bivalve Entomostraca, and for papers treating of that 

 Order. To Mr. J. F. Whiteaves, I am again indebted for access to types of Cambrian fossils 

 in the Museum at Ottawa. 



Plate V. 



Fk:. 1. — Arclu'ocijdtlnts (J) pavrmokhs, n. sp., j. — I'l, inside surface of tube, annulated and striated. — 1'/, outer surface 

 dotted with cells. — Ic, inner surface enlarged t. — Id, vertical section of tlic. tliick jiart of the sponge 

 showing rows of cavities along the walls, etc. 1? Fi'om Div. l.C". See p. 29. 



Fig. 2. — Pntoiyiongiii (?) minor, n. sp., |, fragment of shale, with layers of the skeleton ci'ossing cacli other at \arious 

 angles. From Div. l.r'. See p. 30. 



Fid. 3. — Proloa^jongia (?) minor, var. <JiH(ini>, î, fragment of the shale with impression of the skeleton. From 

 Div. I.c7. See p. SO. 



Fifi. 4. — Eocoryne geminnin, n. gen. et sp., \, examples with full number of cusps. — 4'(, section of an example having 

 two cusps, and showing the hollow core of the organism. — 4h, example with three cusps and liaving the 

 base broken open. From Div. l.c'. See p. 31. 



Fir;. .5. — Dmdrognipnis (?) primordùdif, n. sp., i, fragments with terminal branchlets. — 5a, lower part of stem show- 

 ing the root-hke base. — 5li, branchlet bearing cellules, enlarged ']. From Div. 1.(7. See p. 31. 



Fic. 6. — Pr'iloyrapavn ahitus, n. gen. et sp., j. Fragment of the frond, in some ]>laces decorticated on the racliis 

 and showing cavities of the lellules. From Div. ^.d. See p. 32. 



Flo. 7. — LinijiihllK iiifalu, n. sp., ;, ventral valve. — Ta. same seen in prolile. From Div- 1.'/. St'e p. 33. 



See. IV., 1885. 11. 



