270 
W. E. WADE 
spines or granules on the latéral niargins between processes 
(rather than a pair of verrucae). S. pseudosebaldii var. gosty- 
niense Racib. is similar both in its basal inilation and in orna¬ 
mentation. but the processes are markedly convergent, the latéral 
margins are verrucose and the apical ornamentation is difl'erent. 
*S'. rugosuiu Irénée-Marie. Oakland County. 
S. sebaldii var. ornaium Nordst. Emmet and Oakland Counties. 
S. setigerum Cleve. Houghton and Oakland County. 
S. setigerum var. brevispinum G. M. Smith. Barry County. 
S. setigerum var. pectinatum West and West. Presque Isle County. 
S. spiculiferum G. M. Smith fa. The Michigan specimens from 
Livingston County resemble figures 19 and 20 on plate 71 shown 
by Smith (1924) but there are three long spines at the basal 
latéral angles, and three long spines at the apical latéral angles. 
In addition, there is an apical linear sériés of short spines within 
each latéral margin (in vertical view). 
S. spongîosum var. perbifidum fa. spinosa Irénée-Marie. This forma 
may be merely within the range of environmeiital variation of 
tlie variety perbifidum W. West. Emmet County. 
5. subcruciatum Cooke and Wills. Specimens from Barry County 
are similar but larger than the typical, but those from Marquette 
and Presque Isle Counties hâve the processes reduced or comple- 
tely lacking and should probably be considered a distinct and 
named form. 
S. subdenticulatum Nordst. fa. Michigan specimens from Delta 
County lack the triangular pattern of granules on the apices 
which are characteristic of the typical. Nordstedt (1895) ques¬ 
tions this species as possibly being an expression of S. avicula. 
The writer’s .specimens also hâve more robust spines than the 
typical. 
S. subgracülimum West and West. Schoolcraft County. 
S. subpygmaeum West. Emmet County. 
S. trifidum var. inflexum West and West. Schoolcraft County. 
S. vestitum var. semivestitum West fa. Specimens from Chippewa 
County hâve only slightly twisted processes and two bifurcate 
processes are présent on each latéral margin, whereas this 
variety typically possesses twisted processes and a single bifur¬ 
cate spine on one side at the base of each process. 
Onychonema Wallich. 
Onychonema laeve var. latum West and West. Calhoun, Gogebic 
and Hougton Counties. 
Soijrbe MNHN. Paris 
