Cope.] 486 [Sept. 19, 
and occupies an emargination which approaches near to the nasal suture. 
The pitting of the muzzle is fine, and the swollen interspaces much the 
wider, The teeth have stout conic crowns, with well-developed cutting 
edges and coarse striate sculpture. The mandible is acuminate to the 
narrow extremity, and has a long symphysis, which extends to opposite 
the third tooth behind the notch. The cervical vertebra preserved, have 
round cups; they have a simple elongate hypapophysis with a pit. behind 
it ; shoulder very prominent. 
M. 
Menoth, OL TamMUS With << S6Cth.. 6. <b. sees se ws os 
ey eo OY MUNMULV. GIG Riba av ies eaturs Gy 0 iis Hers vee PSN eC mee 310) 
WAGED <0 seit CLG OL SV ILD IV ALS saa Giubeydy, die sick 0 085 
ee alkoy hee eipoite na(Cull alts iam youre i ey elaeetan reer ry) 0)210) 
re Marley: ve uit TOOUM DOVE... 1%. y.54s 6s cals «1s -060 
rt Lo NOUN ADOVEG) 64 erent Witetes srs ripe e020 
This species has a more slender muzzle than those described by Marsh 
and Leidy, and is of larger size. 
RHINEASTES PELTATUS. Cope. 
Gen. et sp. noy. Nematognathorum. 
Established on cranial and other bones, with spines of a siluriform fish 
of the size of the largest species of Amiurus. The form, in the excessive 
rugosity of the external long surfaces, reminds one of some of the Bra- 
zilian Dorades. The frontal fontanelle is closed, though very distinctly 
marked by a groove of the surface not rugose. The rugosity consists of 
innumerable, packed osseous, papille. The cranial ossification is con- 
tinued posteriorly as a shield, which is strongly convex from side to side. 
The spine is symmetrical, and probably dorsal. It is compressed and curved 
antero-posteriorly, and is deeply grooved behind. Laterally it is closely 
striate grooved ; the anterior face is narrowed, obtuse, and minutely ser- 
rate with cross ridges ; each side of it is rugose with several irregular 
series of pronounced tubercles, arranged transversely. 
M. 
Width frontal bone near front of fontanelle........... 0.012 
Thickness at do. ~ 4.3. aseurace 3 et ae ia 004 
es & Of CASQUC) Os. ai cee ss Piet Gua aies 004 
Width Spine: sss ..0., A Cade nates MERIC an s 005 
Depiicia iwes rare ar ere flee 009 
RHINEASTES SMITHII. Cope. 
Indicated by a dorsal spine of an individual of smaller size than the 
type of the last named. It is less rugose, and more firmly striate, and 
possesses a row of short reverted spines in its posterior groove. The 
anterior edge is furnished with a finely serrate keel, which has a groove 
on each side at the base. ‘The section is oval, the posterior face not being 
flattened as in the last species. Antero-posterior diameter near middle 
M. .005; at base .006; width behind above base .006. 
Named for my respected friend, Daniel B. Smith, of Germantown ; 
many years Principal of Haverford College, and a student and lover of 
the Natural Sciences. 
