306 ; R. R. GURLEV 
5 In the black shales of the Lower Dicellograpsus zone in the Hudson Valley, I 
have found typical specimens of this species. I believe it does not occur at other hori- 
zons. Ami (Ann. Rep. Geol. Surv. Can. for 1887, p. 53K ; consult also 51K, where 
the same zone appears to be represented), reports it, however, from a horizon cer- 
tainly Calciferous, and apparently Upper Calciferous. (See also Note 8.) 
©Tt is doubtful whether this is Geinitz’s species. More probably it is referable to 
the next, as there appears to be but one species closely allied to Geinitz’s at this hori- 
zon, and that one Prof. Lapworth (JZS. report to author) says is distinct. Cf next. 
17 Probably Ami’s D. forchhammer? is this species. Cf. preceding note. 
8 As suggested by Lapworth (Geol. Distrib. Rhabdophora, p. 31), the following 
species described by Emmons (American Geology, 1856. Pt. 2, pp. 104-111), are prob- 
ably referable to this zone. 
Didymograpsus ? (“ Monograpsus’’) elegans Emm. 
sy ? (“Monograpsus”’) rectus Emm. 
Dicranograptus ? (“Cladograpsus’’) inequalis Emm. 
: (‘Cladograpsus’’) dissimilaris Emm. 
Diplograpsis foliaceus Murch. 
(as D. dissimilaris Emm.) 
(as D. rugosus Emm.) 
(as D. obliquis Emm.) 
(as D. laciniatus Emm.) 
foliosus Emm. 
Glossograpsus arthracanthus. 
6é 
setaceus Emm. 
Further, Didymograpsus ? (“Monograpsus”) rectus Emm., from ‘Columbia 
county (N. Y.), in the Taconic Shales,” probably belongs at this horizon, which is 
very well developed in Columbia county. The species presents every appearance of 
an accidental juxtaposition of two fragments. 
79 As an appendix to the table, the following fauna reported by Dr. C. A. White, 
(Rep. Wheeler Surv, 1875, IV., pp. 62-66), from strata five miles north of Belmont, 
Nevada, may be noted. The identifications have been made after a study of the types 
in the National Museum. As far as the stratigraphic value of the species is con- 
cerned, the horizon might be anywhere from the Lower Dicellograpsus zone to the 
Utica, both inclusive. 
WHITE’s NAME IDENTIFICATION 
Graptolithus (Climacograptus) ramulus. Dicranograptus nicholsoni whitianus. 
Graptolithus (Diplograptus) pristis Hall ? Diplograpsis foliaceus. 
Graptolithus (Diplograptus) hypniformis. Diplograpsis foliaceus ? 
Graptolithus (Diplograptus) quadrimucronatus. Diplograpsis sp.? 
20From a loose slab carried from its original site by commerce; age, “the Hudson 
River Group.” 
21 The “ Climacograptus scalaris, Hisinger, var.xormalis, Lapworth,” of Ami (Ann. 
Rep. Geol. Sur. Can. for 1887 (1889), p. 78K; Bull. Geol. Soc. Amer., 1891, II., p. 
496), is almost certainly this species, as this is the only one at this horizon to which 
it could refer. Hall’s sca/arzs of 1847 consists of four species. Cf Note 9. 
