DEI,. DBS.] 



PISCES. 



595 



DELTODOPSIS, St. John & AVorthen, 1883, 

 Geo. Sur. 111., vol. 7, p- 158. [Ety. from 

 resemblance to Deltodus.] Coronal con- 

 tour and general aspect near Deltodus, 

 distinguished by the differentiation of 

 the median ridge of the anterior coronal 

 prominence, which approaches Cochlio- 

 dus or Chitonodup. Type D. angusta. 



affinis, St. John & Wort,. en, 1883, Geo. 

 Sur. 111., vol. 7, p. 160, Warsaw Gr. 



angusta, Newberry & Worthen 1870, 

 (Deltodus augustui?,) Geo. Sur. 111., vol. 

 4, p. 368, Kaskaskia Gr. 



bialveata, St. John & Worthen, 1883, Geo. 

 Sur. III., vol. 7, p. 169, Burlington Gr. 



convexa, St. John & Worthen, 1883, Geo. 

 Sur. 111., vol. 7, p. 169, Up. Burling- 

 ton Gr. 



convoluta, St. John & Worthen, 1883, 

 Geo. Sur. 111., vol. 7, p. 165, Up. Bur- 

 lington Gr. 



exornata, St. John & Worthen, 1883, Geo. 

 Sur. III., vol. 7, p. 168, Warsaw Gr. 



inflexa, St. John & Worthen, 1883, Geo. 

 Sur. 111., vol. 7, p. 167, Keokuk Gr. 



keokuk, St. John & AVorthen, Geo. Sur. 

 111., vol. 7, p. 169, Keokuk Gr. 



stludovici, St. John & Worthen, 1883, Geo. 



Sur. 111., vol. 7, p. 161, St. Louis Gr. 

 DELTODUS, Agassiz, 1859, MSS., and New- 

 berry & Worthen, 1866, Geo. Sur. 

 111., vol. 2, p. 95. [Ely. delta, tri- 

 angle; odous, tooth.] Teeth large, 

 thick, strong, triangular, more or le^s 

 arched, sometimes inrolled from the 

 longer and more acute angle to the op- 

 posite margin ; crown surface arched 

 or marked by 1-3 prominent ridges 

 from the basal margin toward the 

 longer angle. Type D. sublsevis. 



aZa'wt, Newberry & Worthen, syn. for 

 Chitonodus latus. 



angularis, Newberry & Worthen, syn. 

 for Ortuopleurodus carbonarius. 



angwtu*, see Deltodopsis angusta. 



ciuc-tu us, St. John & Worthen, 1883, 

 Geo. Sur. 111., vol. 7, p. 146, Warsaw Gr 



cingulatus, Newberry & Worthen, 1866, 



1 Geo. Sur. 111., vol. 2, p. 99, Kaskaskia Gr. 



complanatus, see Sandalodus complanatus. 



fasciatus, see Tseniodus fasciatus. 



giandis, Newberry & Worthen, 1866, Geo. 

 Sur. 111., vol. 2, p. 101, Keokuk Gr. 

 Probably syn. for Sandalodus laevis- 

 simus. 



intermedius, St. John & Worthen, 1883, 

 Geo. Sur. 111., vol. 7, p. 153, St. Louis Gr. 



latior, St. John & Worthen, 1883, Geo. 

 Sur. 111., vol. 7, p. 145, Keokuk Gr. 



littoni, Newberry & AVorthen, 1870, Geo. 

 Sur. 111., vol. 4, p. 367, Subcarbonif- 

 erous. 



occidentalis, Leidy, 1856, (Uochliodus oc- 

 cidentalis,) Trans. Am. Phil. Soc., vol. 

 11, p. 87, Warsaw and St. Louis Grs. 



parvus, St. John & AVorthen, 1883, Geo. 

 Sur. 111., vol. 7, p. 151, St. Louis Gr. 



powelli, St. John & AVorthen, 1883, Geo. 

 Sur. 111., vol. 7, p. 154, Carboniferous. 



propinquus, St. John & AVorthen, 1883, 

 Geo. Sur. 111., vol. 7, p. 56, Coal Meas. 



rhomboid etis, Newberry & Worthen, syn. 

 for Sandalodus spatulatus. 



spatulatus, Newberry & Worthen, 1866, 

 Geo. Sur. 111., vol. 2, p. 100, Burling- 

 ton Gr. 



stellatus, Newberry & AVorthen, 1866. 

 Geo. Sur. III., vol. 2, p. 97, Keokuk Gr. 



trilobus, St. John & Worthen, 1883, Geo. 

 Sur. III., vol. 7, p. 148, Warsaw Gr. 



undulatus, Newberry & Worthen, 1866, 

 Geo. Snr. 111., vol. 2, p. 98, Keokuk Gr. 

 DELTOPTYCHIUS, Agassiz, 1859, iMSS., and St. 

 John & Worthen, 1883, Geo. Sur. 111., 

 vol. 7, p. 89. [Ety. drlta, triangle: 

 ptyx, a wrinkle,] Posterior teeth of 

 lower jaw trigonal, strongly built, and 

 arched in the direction ot inrollment; 

 coronal contour in three divisions, nar- 

 rowing toward the outer extremity; 

 those of the upper jaw subspatulate, 

 inrolled on the outer u>aigin, acute 

 posteriorly. Type D. acutus. 



expansus, St. Joh'n & Worthen, 1883, Geo. 

 Sur. 111., vol. 7, p. 98, St. Louis Gr. 



nitidus, Leidy, li-5tf, (Cochliodus nitidus,) 

 Trans. Am. Phil. Soc., vol. 11, p. 87, 



primus, St. John & AVorthen, 1883, Geo. 



Sur. 111., vol. 7, p. 93, Up. Burling- 



ton Gr. 

 varsoviensis, St. John & AVorlhen, 1883, 



Geo. Sur. 111., vol. 7, p. 96, AVarsaw Gr. 

 wachsmuthi, St. John & Worthen, 1883, 



Geo. Sur. 111., vol. 7, p. 93, Keokuk Gr. 



FIG. 1124. Deltoptychius wachsmuthi. 



DESMIODUS, St. John& AVorthen, 1875, Geo. 

 Sur. 111., vol. 6, p. 337. [Ety. desmos, 

 & ligament ; odous, a. tooth.] This name 

 was at'plied to a genus of bats, in 1826, 

 by Prinz, Neu. AVied. in Beitrage zur 

 Naturg. Brasiliens. Teeth occurring in 

 rows, small, robust; crown laterally 

 elpnga ted, arched vertically, median cus-p 

 wiin lateral crests ; base constricted 

 and produced. Type D. tumidus. 



costelliferus, St. John & 

 AVorthen, 1875, Geo. Sur. 

 III., vol. 6, p. 341, St. 

 Louis Gr. 



flabellum, St. John & AVor- 

 then, 1875, Geo. Sur. 111., Fl - H25. Des- 

 vol. 6, p. 343, Keokuk Gr. Sit?" r us" 



ligoniformis, St. John & Convex as- 

 Worthen, 1875, Geo. Sur. Pct. 

 III., vol. 6, p. 342, Keokuk Gr. 



minusculus, Newberry & Worthen, 1806, 

 (Oiodus minnscnlus,) Geo. Rep. 111., 

 vol. 2, p. 67, Keokuk Gr. 



