716 



PISCES. 



|imi.. i>hu:. 



breadth. Other parte unknown. Type 

 II. rugosum. 

 rugosum, Claypole, L883, (Pterichtbya ru- 



gosa,) Proc. Am. Phil. Soc, vol. 20, 

 p. 664, Chemung Gr. 



Hoi.oi'TYcuus granulatus, H. pustulosus, 

 H. tuberculatus, Newberry, 1889, Pal. 

 Fish N. Am., pp. 100, 101, Chemuog 

 Gr. ; and II. halli and II. radiatus, pp. 

 114, L16, Catekill Gr. 



[canodus, n. gen. [Ety. ikanot, befitting; 

 odous, tooth.] Proposed for Tomodus, 

 38iz, MSS. and Si. .John & Worthen, 

 1883, Geo. Bar. 111., vol. 7, p. 171, which 

 name was preoccupied among the fishes 

 by Trautschold, in L879. Type I. limi- 

 taris. 

 limitaris, St. John & Worthen, 1883, 

 (Tomodus limitaris,) Geo. Sur. 111., vol. 

 7. p. 173, Up. Burlington Gr. 



.Ian assa has for its type .1. bituminosa. 



Labodvt marginatum Newberry, 1889, Pal. 

 Fish N. Am., p. 198, St. Louis (ir. The 

 genus Labodus was not defined by 

 Agassis, I'avis need it in 1S83, but in 

 1 889, Wood ward &8herborn classed it as 

 a synonym for Copodus. The species il- 

 lustrated by Newberry will belong to 

 some other genus, probably not yet de- 

 lined. 



Liognathtu, Newberry, 187:'>, < >hio I'al., vol. 1, 

 p. 306. The name was preoccupied 

 among the fishes by Lacopede, in 1802. 

 See LispognathuB. 

 .<l,<fhtl(ititx, see Lispognathus spatulatus. 



Lispo<;n\ mi B, n. gen. [Ety. lispot, smooth ; 

 giiathos, jaw.] Proposed for Liognathus, 

 Newberry, 1.S73, Otiio I'al., vol. 1, p. 306, 

 which name was preoccupied. Type 

 L. spatulatus. 

 spatulatus, Newberry, 1873, (Liognathus 

 spatulatus,) Ohio Pal., vol. 1. p. 306, Up. 

 Held. Gr. 



M azooi s, Newberry, 1889, Pa?. Fish N. Am., 

 p. 178. [Ety. maza, a barley-cake ; od&U0, 

 tooth.] Teeth of Flasmobraneh or 

 Selachian fishes, often of large size, 

 thick and massive, with an ovoid, ellip- 

 tical, or angular outline; upper surface 

 arched in both directions, smooth or 

 finely granulated ; under surface con- 

 cave, coarsely pitted, and variously 

 furrowed and lobed ; sides marked by 

 irregular, often pustulous ridges ; in- 

 terior similar throughout, showing 

 irregular, vertical, calcigerous tubes or 

 columns closely compacted into a dense, 

 hard, and enamel-like tissue ; mandibles 

 7 to 8 inches long, and 1] inches to 1| 

 inches wide. Type M. kepleri. 

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

 p.180, Cuyahoga Shale. 



Mili.krichthys, n. gen. Proposed for 

 Pterichthys, Agassiz, 1843, Poiss. Foss., 

 vol. 2, p. 302, which name was pre- 

 occupied among the fishes by Swainson, 

 in 1839. [Ety. the name is proposed 

 in honor of Hugh Miller, who was 

 really the first to fully characterize and 



illustrate the genus in his work on 

 "The Old Wed Sandstone."] Type M. 

 milleri. It is doubtful whether or not 

 this genus is represented in North 

 America. 



Mtlostoma, Newberry, 1883, Trans. N. Y. 

 Acad. Sci., vol. 2," p. 146, and Pal. Fish 

 N. Am., p. 161. [Ety. mulos, a grinder; 

 stoma, mouth.] Teeth consist of strong 

 and massive tables of bony tissue, 

 becoming more dense and enamel-like 

 toward the triturating surface; they 

 apparently formed several pairs on 

 both the upper and lower jaws ; the 

 principal plates of the lower jaw had 

 lorn,' oval or spatulate crowns, 3 to 6 

 inches in length by 1 to 2 inches wide, 

 and half an inch or more in thickness, 

 supported by strong, vertical, spatulate 

 bones, which projected downward and 

 backward, terminating posteriorly in 

 thin, rounded margins. The upper sur- 

 face of the crown is raised into a more 

 or less prominent tubercle, which is 

 situated near the exterior margin, and 

 slightly anterior to the middle; another 

 pair are triangular in outline ; the den- 

 tal plates of the upper jaw are tabular 

 and consist of very dense tissue. Type 

 M. variabile. 

 terrelli, M. variabile, Newberry, 1883, 

 Trans. N. Y. Acad. Sci., vol. 2, p.' 146, and 

 Pal. Fish N. Am., p. 164, Cleveland 

 Shale. 



Gestoimiori s, n. gen. Proposed for Sphe- 

 nophorus, Newberry, 1880, Pal. Fish 

 N. Am., p. 92, which name was pre- 

 occupied by Schoenherr, in 1838, among 

 the Coleoptera. [Ety. ohtos, an arrow; 

 pharos, bearing.] The clavicle is a flat- 

 tened bone, inches or more in length 

 by 11 inches in width at the middle, 

 narrowing to either end ; the anterior 

 margin strongly retiexed ; the exterior 

 surface is marked by many rows of 

 relatively large arrowhead-like tuber- 

 cles, closely set one behind the other, 

 the points directed forward; other 

 parts unknown. Type 0. lilleyi. 

 lilleyi, Newberry, 1889, (Sphenophorus 

 lilleyi,) Pal. Fish N. Am., p. 92, Che- 

 mung (ir. 



Onychodis ortoni, Newberry, 1889, Pal. 

 Fish N. Am., p. 71, Ham. (ir. 



Petalorhynchts, Agassiz, MSS. only, 

 Newberry & Worthen, 1866, Geo. Sur. 

 111., vol. 2, p. 32. 



Phaneropi.euron, Huxley, 1859, Anderson's 

 Dura. Den., p. 67. Type P. ander- 

 soni. 



Phcebodus politus, Newberry, 1889, Pal. 

 Foss. N. Am., p. 173, Cleveland Shale. 



Phvllolepis, Agassiz, 1844, Poiss. Foss. 

 Vieux Gres Rouge, etc., p. 67. [Ety. 

 phyllon, a leaf ; lepis, scale.] Thin, 

 more or less elliptical scales. Type P. 

 concentricus. 

 delicatula, Newberry, 1889, Pal. Fish N. 

 Am., p. 97, Chemung Gr. 



