402 Professor T. Rupert Jones — iV. American Ostracoda. 



refers to the new family Bradoriidse ; and they appear to be allied 

 to Aparchites and Leperditia. Hipponicliarion, by its superficial 

 ridges, seems to be the only representative of the Beyrichiidse. 

 « 2 -5- 



Outlines of the Eight Valve of some of the Geneka. — Fig. 1, Indiana; 



2, Bradorona ; 3, Beyrichona ; 4, Sippoyiicharion ; 5, Bradoria ; 6, Escasona. 



In pi. i of the memoir No. 10, figs. 1-6 (here copied) are : "Diagrammatic figures 

 of genera to show important characters referred to in the text — o, ocular tubercle ; 

 m, scar of adductor muscle ; c, cardinal or hinge-line ; a, anterior cardinal curve ; 

 b, posterior cardinal curve ; c, anterior marginal curve ; d, posterior marginal cuxve ; 

 V, ventral margin." 



The small letters o to v are omitted for the sake of clearness in these copies, but 

 the featm-es referred to are sufliciently distinct. 



The following list indicates the succession and subjects of those 

 of the above-mentioned memoirs that contain descriptions and often 

 illustrations of these very ancient Entomostracan remains : — 



°% 

 O H 



^a 

 1 



2 



3 



4 



' 6 



i. 6 



H Particular Faunje and 



p Formations. 



1886 Lower Cambrian: St. John Group Trans. Roy. Acad. Canada, vol. iii. 



1890 

 1894 



Lower Cambrian 

 Lower Cambrian ... 



1895 Frotolenus-zone 



1896 Taradoxides -zone ... 

 1898 Cambrian : St. John 



Trans. Eoy. Acad. Canada, vol. vii. 

 Trans. Eoy. Soc. Canada, vol. xi. 

 Trans. New York Acad. Sci.,vol.xiv. 

 Trans. New York Acad. Sci. , vol. xv. 

 Trans. Eoy. Soc. Canada, ser. ii, 



vol. iv, sect. 4. 

 Bull. Nat. Hist. Soc. New Bruns- 

 wick, VIII, vol. iv. 

 1899 Etcheminian gi'oup of Newfoundland Trans. Eoy. Soc. Canada, ser. ii, 



A^ol. V, sect. 4. 

 1899 Etcheminian group of Newfoundland Bull. Nat. Hist. Soc. St. John, New 



Brunswick, xviii, vol. iv. 

 1902 Etcheminian of Cape Breton ... Canadian Eecord Sci., vol. viii. 



The geological formations or terranes of the north-eastern part 

 of America concerned in Dr. Matthew's researches are noted in the 

 memoir No. 4, p. 102, as — 



Ceratopyge fauna Upper Tremadoc . 



7 1899 Etcheminian group of Cape Breton 



10 



Upper Cambrian 



Lower Cambrian 



Peltura fauna 

 Olenus fauna . . . 

 Faradoxides fauna 

 Olenellus fauna ^ 



Lower Tremadoc. 

 Lingula Flags. 

 Menevian and Sclva. 

 Caerfai Group. 



1 At p. 105 referred to the Etcheminian stage of Pre-Cambrian age. 



