74 Lie Iito, (GHUIRILIS NE 
to notch between branches five (sometimes as much as 6™™"), showing below 
the level of the notch, at most seven (usually six, sometimes five) thecze ; width 
of proximal portion 1.25 to 1.50"; branches, in the compressed condition, 
I to 1.25™" wide; diverging at an angle of 45° (sometimes slightly less) to 
50°, with a very gentle inward curve which brings them into parallelism, or 
even approximates them still further. Thecz forming bent tubes with the 
tip introverted, 24 or 25 in 25™™"; some of them (probably all on basal portion ; 
material here uncertain) bearing an acute spine. 
This variety is a well-marked one. In form the most characteristic speci- 
mens approach closely D. zéczac minimus Lapw., but our form is at least 
twice as large as Lapworth’s, and besides D. zéczac appears not to occur in 
our strata. From the characteristic calliper-shape as a basis, the variety 
shades into var. Parvangulus, which has the branches straighter and contin- 
ually divergent. 
Horizon and locality.—Lower Décellograpsus zone, Stockport, N. Y. 
CLIMACOGRAPTUS HALL, 1865. 
Gany Ore. Rem, Dec 2,p. 3. Uype G. dzcornzs (Hall): 
Climacograptus antiguus Lapworth sp. nov. 
(Climacograptus antiguus, Geol. Mag., 1873, X, p. 134, momen nudum ,; 
C. celatus, Lapworth, 1876, in Armstrong, Young & Robertson's 
Cat. West. Scot. Foss., p. 6, Plate I., Fig. 56; 2b., Lapworth, 13877, 
Ann. Rep. and Proc. Belfast Nat. Field Club, I, Part IOW35 JDs HBO} 
Plate VI., Fig. 39; 26. Lapworth, 1886, Trans. Roy. Soc. Can. for 
1886, V. Sect. IV, p. 178. Synonymy fide Lapworth, letter.) 
This being the first publication of the synonymy which establishes the 
species, it is to be regarded as a new one dating from this publication. 
Climacograptus caudatus Lapworth," 1876. 
Climacograptus caudatus, in Armstrong, Young & Robertson’s Cat. West. 
Scot. Foss., p. 6, Plate II., Fig. 48; 2b., Lapworth, 1880, Ann. and 
Miaige Nateblists, Wil p22. 
Polypary attaining, in one proximally (“distally”) incomplete specimen, 
a length (exclusive of prolonged virgula), of 80™™. Maximum breadth, 
attained at proximal (‘‘distal’’) extremity, 2.25™. Polypary increasing 
gradually in width, nearly the full width being attained by the middle of the 
polypary, so that the widening is less rapid from that point to the proximal 
(‘distal’) extremity, which latter is abruptly cut off. Distal (“ proximal ”’) 
extremity marked by extension of virgula. Lateral spines not seen (condi- 
tions of specimens unsatisfactory.) Virgula about 0.75™" wide, prolonged 
« For remarks on the present form and C. cawdatus Jaticaulis see next page. 
