DENDROID GRAPTOLITES OF HAMILTON, ONTARIO. 



51 



65. INOCAULIS CERVICORNIS SPHNCEK, 



Copy OF Spencer's figubb. 



INOCAULIS CERVICORNIS Spencer. 



InocauUs ccrricorni>< Spencer, Canadian Nat., X, 1882, p. 165, nomen 

 nudum; Trans. Acad. Sci. St. Louis, IV, 1884, pp. 565, 587, pi. 5, fig. 5; 

 Bull. Mus. Univ. State Missouri, I, 1884, pp. 15, 37, pi. 5. — Gurley, 

 Journ. Geol., IV. 1896, pp. 90. 308. 



The original description is as follows : 



Frond consisting of stipes tiaving a common origin and rising above into a 

 few stout, widely extended, bifurcating branches, averaging from L5 to 

 2 mm. in breadth, and terminating in 

 dicbotomous points of equal thick- 

 ness : texture corneous, with a striated 

 surface. 



Owing to the striations the appear- 

 ance of the surface is that of rough 

 scales or fibers, somewhat resembling 

 the exterior portion of /. iiluiiin- 

 losus. In the growing state the 

 branches appear to have been 

 strengthened by longitudinal fibers — 

 s<olid corrugations — and the cells to 

 have been arranged vertically between Fig. 

 them. A portion of the branches show 

 a solid central axis, with a common canal surrounding it. The general arrange- 

 ment of the branches resembles that of the horns of the American elk. 



The typical specimen consists of 6 principal stipes, each about 3 centimeters 

 long, witli only a few branches. These stipes are united by a common runner 

 (in the botanical sense), so that the whole organism is 5 centimeters broad 

 and 3 centimeters high. 



Formation and localiti/. — This rare and beautiful species occurs in the shaly 

 dolomites of the Blue Building beds of the Niagara formation at the " Jolly-cut," 



Hamilton, Ontario. 



A single specimen in the collec- 

 tion of the U. S. National Mu- 

 seum is known, but presents no ad- 

 ditional in form a t i on . 



INOCAULIS PHYCOIDES Spencer. 



Iiiocanlh pliyorldcs Spencer. Cana- 

 dian Nat.. X, 1882, p. 165, no- 

 men nudum. 



InocauUs phycoidcs Spencer, Trans. 

 Acad. Sci. St. Louis, IV, 1884, 

 pp. 565. 588, pi. 5, figs. 6, 7; 

 Bull. Mus. Univ. State Missouri, 

 I, 1884, pp. 15, 38. pi. 5, figs. 

 6, 7. — Gurley, Journ. Geol., IV, 

 1896, pp. 99. 309. 



The original description is as fol- 

 lows: 



Stem flattened and from 2 to 3 mm. broad; branches fastigiate, and originat- 

 ing on both sides of the principal stipe at frequent irregular intervals, and 

 dividing near their terminations into two stout branchlets (from s to 11 cm. 



Fig. GG. — INOCAULIS phycoide.s Spencer. 

 The type-specimen and a branch en- 

 larged. 



