ECZ. — HOL.] 



PISCES. 



715 



Eczbmatolepis, n. gen. [Ety. eczema, a 

 cutaneous eruption ; lepit, scale.] Pro- 

 posed for Acantholepis, Newberry, 

 1875, Ohio Pal., vol. 2, p. 38, which 

 name was preoccupied. The type is 

 E. pustolosa, Newberry, 1875, (Acantho- 

 lepis pustulosa,) Ohio Pal., vol. 2, 

 p. 38, Up. Held. Gr. 



Eurylepis, Newberry, 1856. Proc. Acad. Nat. 

 Sci. Phil., and Ohio Pal., vol. 1, p. 350. 



» This name was preoccupied by Blyth, 

 among the reptiles, in 1854. See Hap- 

 lolepis. 

 corrugata, E. granulata, E. insculpta, E. line- 

 ata, E. minima, E. ornatissima, E. ovoidea, 

 E. striolata, E. tuberculata. See Haplol- 

 epis. 



Gamphacanthus, n. gen. [Ety. gamphos, 

 bent ; akantha, spine.] Proposed for 

 Heteracanthus, Newberry, 1889, Pal. 

 Fish. N. Am., p. 65, which name was 

 preoccupied. Pectoral (?) spines eight 

 inches or more in length, robust, with 

 a posterior opening reaching to or near 

 the summit; base compressed, one and 

 a half inches wide, obliquely rounded 

 below ; shaft curved forward, regularly 

 arched transversely, covered with highly 

 polished enamel, and marked by fine 

 denticulate, longitudinal sutures, which 

 divide the surface into broad, nearly 

 v equal bands or flattened ridges ; the 

 sutures are most numerous beiow, but 

 terminate in succession above, so that 

 few reach the conical pointed summit. 

 Type G. politus. 

 politus, Newberry, 1889, (Heteracanthus 

 politus,) Pal. Fish. N. Am., p. 66, 

 Ham. Gr. 



Ganorhynchus, Traquair, 1873, Lond. Geo. 

 Mag., vol. 10, p. 552. [Ety. ganos, 

 brightness ; rhynchos, beak.] This genus 

 was founded on the fragment of a snout 

 1J inches long and 3 inches wide, sup- 

 posed to belong to a fish 4 or 5 feet 

 long. The country from which it came 

 and its geological age are wholly un- 

 known. Type G. woodwardi. 

 beecheri, Newberry, 1889, Pal. Fish N. 

 Am., p. 95, Chemung Gr. 



Glyptaspis, Newberry, 1889, Pal. Fish N. 

 Am., p. 157. [Ety. glyptos, sculptured ; 

 aspis, shield.] Placoderm fishes of 

 large size, protected by thick bony 

 plates, of which those of the plastron 

 were probably 5 in number ; the middle 

 one is lance-shaped or subrhomboidal, 

 its central portion tuberculated, its mar- 

 gins sloped off and smoothed or striated 

 by the overlap of the lateral ventral 

 plates. The upper part of the body car- 

 ried a number of lanceolate or ellipsoidal 

 plates, of which the central parts are 

 ornamented, the margins smooth and 

 sloped down to thin edges ; other parts 

 unknown. Type G. verrucosa, 

 verrucosa, Newberry, 1889, Pal. Fish N. 

 Am., p. 158, Cleveland Shale. 



GLYPTOPOMus,Agassiz, 1844, Monographic des 



Poissons fossiles du Vieux Gres Ronge 

 ou Systeme Devonien des lies Brittan- 

 iques et de Russie, p. 77. Type G. 

 minor, of which Huxley figured and 

 described nearly an entire specimen in 

 1866, in Brit. Organic Remains, dec. 12, 

 (Mem. Geo. Sur.,) p. 4. 

 sayrei, Newberry, 1878, Ann. N. Y. Acad. 

 Sci., vol. 1, p. 189, and Pal. Fish N.Am., 

 p. 116, Catskill Gr. 



Goniodm, Newberry, 1889, Pal. Fish N. Am., 

 p. 67. This name was twice preoccupied, 

 first by Agassiz in 1836, and by Dunker, 

 in 1848, in the mollusca. See Xenodus. 

 liertzeri, Newberry, 1889, see Xenodus 

 hertzeri. 



Gorgonichthys, Claypole, 1892, Am. Geo., 

 vol. 10, p. 1. [Ety. Gorgon, mythological 

 name ; ichthys, fish.] Founded upon 

 the lower left mandible, which is simi- 

 lar to that in Ponerichthys, and the point 

 of a premaxillary'tooth, behind which 

 there is a tooth terminating downward 

 in two blunt processes, the larger one 

 in front, which distinguishes it from 

 the upper cutting blade in Ponerichthys. 

 Type G. clarki, described at the same 

 place from the Cleveland Shale. 



Gyracanthus incurvus, Traquair, 1890, Geo. 

 Mag., vol. 7, p. 21, Low. Devonian, 

 sherwoodi, Newberry, 1889, Pal. Fish N. 

 Am., p. 119, Catskill Gr. ; and G. inor- 

 natus, p. 177., Waverly Gr. 



Haplolepis, n. gen. [Ety. haplos, simple ; 

 lepis, scale.] Proposed for Eurylepis, 

 Newberry, 1856, Proc. Acad. Nat. Sci. 

 Phil., and Ohio Pal:, vol. 1, p. 350. 

 Type H. tuberculata, Newberry,' 1856, 

 (Eurylepis tuberculata,) Proc. Acad. 

 Nat. Sci., and Ohio Pal., vol. 1, p. 350, 

 Coal Meas. The species are H. cor- 

 rugata, H. granulata, H; insculpta, H. 

 lineata, H. minima, H. ornatissima, 

 H. ovoidea, H. striolata, H. tuberculata. 



Hakpacanthus, Traquair, .1886, Ann. and 

 Mag. Nat. Hist. A sickle- shaped spine, 

 with H. fimbriatus, from Scotland, as 

 the tvpe. Cited by Newberry in Pal. 

 Fish N. Am., p. 203. 



heteracanthus, Newberry, 1889, Pal. Fish 

 N. Ani , p. 65. The name was pre- 

 occupied in 1836 by Diesing, among 

 the Vermes. See Gamphacanthus. 

 politus, Newberry, see Gamphacanthus 

 politus. 



Holonema, Newberry, 1889, Pal. Fish 

 N. Am., p. 92. [Ety. holos, entire; 

 nema, thread.] A placoderm fish of 

 medium size, having the body inclosed 

 in armor made up of polygonal plates, 

 of which the external surface is en- 

 tirely covered By radiating lines of 

 enamel; the central plate of the plas- 

 tron is coffin shaped, pointed before, 

 broadest near the anterior end, where 

 the sides are produced into prominent 

 lateral angles ; from this point back- 

 ward it narrows to a truncated end, 

 which is half as wide as the greatest 



