XIPHIID^. 
497 
^ Histiophorus rohustus,'^. D. Cope, loc. cit. 1869, p. 310. Xiphias 
rohustus, J. Leidy, in F. S. Holmes, Post-Plioc. Foss. 
S. Carolina (1860), p. 119, pi. xxvii. figs. 3-5.—Tertiary 
Phosphate Beds ; South Carolina. 'XLc / 
Histiop)liorus homalorhamphus, E. D. Cope, Proc. Boston Soc. Xat. 
Hist. vol. xii. (1869), p. 310.—Eocene ; Squankum, X. J. 
The fossil rostra described as follows are not clearly distinguish¬ 
able from those of Histiopjhorus :— 
BracTiyrhynchus solidus, P. J. Tan Beneden, Bull. Acad. Boy. 
Belg. [2] vol. x:^.^1871), p. 498, pi. ii. figs. 
—Middle Eocene (Bpuxelliany; Ghent, Belgium. [Abbey 
of Affigem, Alelle, near Ghent.] 
BracTiyrhynchus teretirostris, P. J. Van Beneden, ihid. p. 495, 
pi. i., pi. ii. figs. 1, 2 ; (?) G. Capellini, Alem. Accad. Sci. 
Istit. Bologna [3] vol. ix. (1878), p. 255, pi. iii. figs. 9, 
10. Encheiziphius teretirostris, L. Biitimeyer, Yerhandl. 
naturf. Ges. Basel, pt. 1 (1857), p. 561.—Pliocene; Mont¬ 
pellier, Southern France, and Antwerp, Belgium. (?) Mio¬ 
cene ; Lecce, Italy. [Type species. Natural History 
Museum, Soleure.] 
Brachyrhynchus van-henedensis, B. Lawley, Nuovi Studi Pesci, 
etc., CoUine Toscane (1876), p. 70.—Lower Pliocene; 
Orciano, Tuscany. 
Emhalorhynchus Tcinnei, 0. C. Marsh, Proc. Amer. Assoc. Adv. 
Sci. 1869 (1870), p. 228.—Eocene; Squankum, N. J. 
The base of a rostrum, not yet described, from the Lower Plio¬ 
cene of Orciano, Tuscany, is named Xiphias delfortriei by B. Lawley, 
op. cit. 1876, p. 67. ^ ^ ^ 
Division C. PEECIFOEMES. 
A’ */ ^ -<-<. >c/. Iff oo, /. r<^o. 
‘ectoral fins with hourglass-shaped basals, which are longer than 
broad; pelvic fins thoracic, with one spine and four or five articulated 
rays. Dorsal fin-rays well-developed, and anal usually with two 
or more powerful spines. No bony stay between circumorbital 
ring and preoperculum. 
Synopsis of Families represented hy Extinct Genera or Species. 
I. Lower pharyngeal bones very rarely fused 
together. 
Teeth small and conical, some on inner 
bones ; spinous dorsal usually as much 
PAET IV. 2 K 
