ECTACODON—ECTOPHYLLA. 25d 
Ectacodon Corr, 1881. Ungulata, Amblypoda, Coryphodontide. 
Am. Naturalist, XVI, for Jan., 1882, 73, Dec. 30, 1881; Paleont. Bull., No. 34, 
167, 1882; Tert. Vert., 519, 1885 (date of publication). 
Type: Ectacodon cinctus Cope, from the Eocene (Wasatch beds) of the Big Horn 
River basin, Wyoming. 
Extinct. 
Ectacodon: àxróc, outside; di), point; 65@v=ddovs, tooth—in allusion to the 
crown of the last upper molar. 
Ectocion Corr, 1882. Ungulata, Condylarthra, Phenacodontid:e. 
Am. Naturalist, X VI, for June, 522, May 20, 1882; Tert. Vert., 695-697, pl. xxv°, 
figs. 9-10, 1885; Wortman, Bull. Am. Mus. Nat. Hist., N. Y., VIII, 83, 1896. 
Type: Oligotomus osbornianus Cope, from the Eocene of the Bad Lands of the 
Big Horn River, Wyoming. 
Extinct. 
Ectocion: éxrós, outside; «icr, pillar—in allusion to the arrangement of the 
cusps on the upper molars, four of the eight cusps being external, ‘‘ two prin- 
cipal external, together with two which arise from the external cingulum.”’ 
Ectoconodon OsnonN, 1898. Ungulata, Amblypoda, 5 
Bull. Am. Mus. Nat. Hist., N. Y., X, 171, fig. 1 f, June 3, 1898. 
Type: Ectoconodon petersoni Osborn, from the Cretaceous (Laramie) of Wyoming. 
Extinct. Based on '' isolated superior molars.”’ 
Ectoconodon: ékróc, outside; K@vos, cone; 66@v=6ddo0vs, tooth—in allusion to 
the ‘‘two external prominent cones (parastyle and metastyle), reinforcing the 
outer wall of the crown" of the upper molars. (OsBORN. ) 
_ Ectoconus Corr, 1884. Ungulata, Amblypoda, Periptychidee. 
Am. Naturalist, XVIII, 795, 796, Aug., 1884; Tert. Vert., 404—405, pl. xxi, 
fig. 12 ( Periptychus ditrigonus), pl. xxix “, figs. 2-6 (Conoryctes ditrigonus) 
1885; Trans. Am. Philos. Soc., new ser., XVI, pt. 11, 355—559, 1888. 
Ectogonus 'TRovEssART, Cat. Mamm., new ed., fase. rv, 723, 1898. 
Type: Ectoconus ditrigonus Cope, from the Puerco Eocene of New Mexico. 
Extinct. Based on ‘‘a right mandibular ramus which exhibits part of the sym- 
physial suture, with the alveoli of the molar teeth, except the first." 
Ectoconus: éx rós, outside; x Ovoc, cone—in allusion to the external cingular cusp 
on the upper molars. 
Ectoganus Corr, 1874. Edentata, Ganodonta, Stylinodontide. 
Rept. Vert. Fossils New Mexico, 4-5, Nov. 28, 1874; Ann. Rept. Chief of Engineers, 
U.S. A., 1874, App. F F3, 592-593; Rept. U. S. Geog. Surv. west 100th Merid., 
IV, 158-162, pls. xr figs. 34-39, xur figs. 1-12, 1877. 
Type: Jtoganus gliriformis Cope, from the Eocene of New Mexico. 
Extinct. Based ‘‘on a number of remains of the crania of two species, includ- 
ing principally teeth, in a good state of preservation." 
Ectoganus: ékrós, outside; y &roc, brightness, luster—in allusion to the enamel- 
coated anterior face of the incisors. 
Ectogonus (see Ectoconus). Ungulata, Amblypoda, Periptychidee. 
Ectophylla H. ALLEN, 1892. Chiroptera, Phyllostomatide. 
Proc. U. S. Nat. Mus., XV, No. 913, pp. 441-442, 2 figs. in text, Oct. 26, 1892. 
Type: Hetophylla alba H. Allen, from the Segovia River, eastern Honduras. 
Ectophylla: é«ros, outside; @UAAorv, leaf—possibly in allusion to the ‘small 
rounded nodule [in front of the nose leaf] which apparently represents the 
lower part of the median leaf-crest.”’ 
