104 CATALOG OF FOSSIL FISHES IN THE MUSEUM 



tion consists almost entirely of raised dots; these coalesce 

 more and more toward the center of the plate tending to 

 fuse into irregular and tortuous thread-lines trending in 

 a general way toward the center of the plate. The plate 

 is very thin, not more than one-eighth of an inch in thick- 

 ness. Length no mm.; greatest width 65, 



From the limestone band in the West River shale 

 (Genesee), a few feet above the Genundewa Limestone. 

 Eighteen Mile Creek, North Evans, near Buffalo, N. Y. 

 Collected by W. L. Bryant. 



Holonema rugosum (Claypole) 



(PI. 32, fig. i) 



E 2513 Cast of a plate 12 by 13 cm. It is of great interest for 

 showing on the outer, ornamented face several tooth 

 marks apparently inflicted by a contemporary animal, 

 probably a dinichthyid. 



Original in private collection of Mr. Edgar E. Teller of 

 Buffalo, N. Y., to whom we are indebted for the privilege 

 of taking casts not only of this but of a number of other 

 specimens. 

 Hydraulic cement rocks (Mid. Devonic) ; Milwaukee, Wis, 



The fragmentary plates figured by C. K. Swartz in his recent work 

 on the middle and upper Devonian of Maryland, under the name 

 Glyptaspis eastmani {Maryland Geol. Surv.: Middle and Upper Devon- 

 ian, p. 700, pi. 73, figs. 1-3, 1913), seem to us to belong in this genus 

 and even perhaps in this species, which apparently had a wide 

 geographical distribution. 



Holonema sp. 



(PI. 33, fig. 2) 



E 2512 Cast of a fragmentary plate remarkable for its thickness 

 (i cm.). It is apparently a fragment of a much larger 

 plate. It is ornamented on the outer face with thread- 

 like lines which anastomose in places into a reticulated 

 network, on the whole more suggestive of Holonema 

 than of any other genus. 



