102 Ly 1k (GWIILI IA 
NODES GOs Six 
References are here given to the articles in which will be found the 
original description of such newly introduced foreign genera and species as 
are not elsewhere (in connection with the tables or descriptions of species) 
properly cited. 
t Geol. Mag., London, 1873, X., pp. 500-4, 555-60. 
2? Hopkinson & Lapworth, Quart. Jour. Geol. Soc., London, 1875, XXXI., pp. 
631-72, Plates XX XIII-XXXVII. 
3 Lapworth, in Armstrong, Young & Robertson’s Cat. West Scottish Fossils, 
Glascow, 1876. 
4 Geol. Mag., London, IV., pp. 107-13, Plate VII. 
5 Ann. and Mag. Nat. Hist., 1880, V., pp. 171-4. 
© Trans. Roy. Soc. Can., X., pp. 95-100, Plate VII. 
7 Geol. Mag., VIII., pp. 20-6, 1 pl. 
3 Intellectual Observer, London, XI., p. 369, Plate II., Figs. 16a—c. 
9 Trans. Roy. Phys. Soc. Edinb., I., pp. 367-70. 
10 Geol. Mag., V., p. 132, Plate V., Fig. 6a—c. 
™y, Baer u. Helmersens Beitrage z. Kenntn. d. russ. Reichs, St. Petersb., VIII., 
pp. 45-6, Plate I., Fig. 6. Gvraptopora socialis, Salter, is a synonym. 
12 Ofy. k. Sv. Vet. Akad. Forh., XXXVIII., No. 9, p. 45. Type 7. expansus. 
13 Ann. and Mag. Nat. Hist., 1V., pp. 231-42, Plate XI. 
™ Toganograptus is recognized by some authors. I can see in the compound 
forms only two fairly good genera, Dichograpsus and Schizograpsus, though a number 
of (mostly unispecific) genera have been proposed. The type of Loganograptus, how- 
ever, is Z. Jogani, and headi is a Tetragrapsus. 
15 British Paleeozoic Fossils, pp. 3-9, Plate Id. 
6 Histoire des Végétavx Fossiles (4°, Paris), pp. 70-71, Plate VI, Figs. 7-12. 
Brongniart’s /ucoides dentatus and F. serra are the (subsequently described) Grapio- 
lithus pristintformts and G. bryonoides of Hall respectively. 
7 ‘Trans. N. Y. Acad. ‘Sci, 1895, pp. 262-73, Plates XI\VIdCy XIU DX. Elis 
Clonograpsus spinosus of 1893 (see note 6, above) is referred to Bryograptus. 
18 Amer. Journ. Sci., p. 401. 
19 Geol. Mag., IX., p. 508. 
20G, Scalaris (Linn.) Hall, 1847, Pal. N. Y., I, p. 271, Plate LXXIIL., Figs. 4a—-g. 
Of these figures, a and 4 are Climacograptus bicornis ; cand d are C. typicalis; e and 
fare Didymograpsus Sagitticaulis; and g is Climacograptus parvus. 
IR, Ik, Goriciv, Il, 1D). 
% 
U. S. GEOLOGICAL SURVEY. 
