PLATE m— Continued. 



ACROTRETA, Kutokga. 



Page 101. 



AcROTHETA Baii.eyi, MilttlieW. 



Fi;;. 32. An internal cast of a pedicle-valve ; showing' the grooved subapical area and the impression of 

 the nipple-like swelling suri'ounding- the foramen. X 4. 

 (Matthkw, Trans. Roy. Soc. Canada, 1SS5, pi. iv, fig. 13c.) 

 Fig. 33. An internal cast of the brachial valve.. X 4. 



(Matthew, op. cii., tip. 13.) ,' , ; 



Fig. 34. The exterior of a pedicle-valve ; showing the size of the ouIkt- foiaminKl aperture. X4 

 St. John group. Long Reach, King's county. New Brunswick. 



LINNARSSONIA, Walcott. 



Page 107. 



LiXNARSSONIA MISEKA (?), Billillg.S (sp.). 



Fig. 3.5. An internal cast of a jiedicle-valve ; showing the impressions of the cardinal bosses and the 

 foraminal callosity. X 6. 

 (Matthbw, (rp. eit., fig. 12c.) 

 Fig. 36. An internal cast of a brachial valve. X 6. 



(Matthew, ojj. cit., fig. 12.) 

 Fig. 37. An intei-nal cast of a pedicle-valve. X 6- 



St. John group. Porter's Brook, iSt. John county. New Brunswick. 



LiNNARSSONIA TRANSVERSA, Hilltt (sj).). 



Fig. 38. An internal cast of a i)edicle-valve ; .showing the inner foraminal aperture, the impressions of the 

 foraminal callosity and cardinal tubercles. X ^>- 



(Matthew, op. cit., fig. lie.) 

 Fig. 39. The counterpart of the same. X 10.' 

 Fig. 40. An internal cast of the brachial valve. X 5. 



(Matthkw, op. cit., tig. 11.) 

 Fig. 41. Posterior view of the same. X !>• 



Fig. 42. The counterpart of the same; showing the median and lateral septa ami the large posterior 

 scai-s. X 10. 



St. John Grou]). Porter's Brook, iSt. John cmnty. New Brunswick. 



LiNNARSSONIA PRETIO.SA, Billillg.S. 



Kig. 43. The interior of a pedjcle-valve. X 6. 

 Fig. 44. The inteiior of a bi'achial valve. X 6. 



(See Dawson, Ti-ans. Roy. Soc. Canada, vol. vii. Sect, iv, p. 53. 1889.) 

 Quebec group. Island of Little Metis, Province of Quebec. 



