Prof. Cocchi—On Labroid Fishes. 411 
Fam. ZEUGLODONTES. 
Genus SquaLapon, Grateloup. 
Species 1. Squalodon Grateloupu, V. M. 
2. Squalodon Antverpiensis, V. B. 
» 9 Sgqualodon Gervasii, V. B. 
» 4. Squalodon Ehrlichi, V. B. 
Genus STENODON, Van Beneden. 
Species Stenodon lentianus, V. B. 
Genus ZEuUGLODON, Owen. 
Species Zeuglodon macrospondylus, Ow. 
»  Zeuglodon brachyspondylus, Ow. 
99 
II. On a New Famity or Lasroiw Fisurs. 
MonoGrarta DEI PHAryncoporitips, Nuova Famicria pi Prscr LAsrorr, del 
Cay. Prof. Ienvo Coccut. Firenze (Florence), 1864, 4to., pp. 88. 
SINCk the completion of Prof. Louis Agassiz’ great work on 
Fessil Fishes, now nearly a quarter of a century ago, no work 
on general Fossil Ichthyology has been produced. The authors who 
have written upon the subject are both numerous and able, but its 
literature is only to be found scattered in various scientific periodical 
publications, journals, and transactions of learned societies, or in 
works specially devoted to the description of the fossil remains of 
some particular formation, locality or country, or of some genus or 
family. To the latter class may be referred the elaborate Monograph 
recently published by Prof. Cocchi upon an interesting though 
small group of Fossil Fishes only known as yet by their dental 
remains. Upon these few but very characteristic portions, and after 
careful examination of many specimens preserved in public and pri- 
vate collections in England, France, Germany, and Italy, the author 
founds his new family of Pharyngodopilide (so called on account of 
the peculiar laminated structure of the dental plates). This group 
he divides into three genera: Phyllodus, Ag.; Egertonia, Cocchi; 
Pharyngodopilus, Cocchi; based upon the “number of the upper 
dentigerous plates, and the form and arrangement of the single teeth. 
The genus Phyllodus was first named by Agassiz in 1843, and 
described in the ‘ Rech. Poiss. Foss.,’ vol. i. pt. 2, p. 238, and also in 
the same year by Prof. Owen, in his ‘Odontography,’ p. 138. It is 
distinguished by having but one upper and one lower dental plate, 
formed of a series of thin laminz, each of which is composed of 
enamel, dentine, and bone. These lamine do not simply form a series 
of broad flat plates, but they are also divided by vertical depressions 
into several series of denticles, which are convex on one surface and 
concave on the other, and the median row of which is always the 
largest. According to the number, size, and form of these, and of 
their accessory or lateral denticles, the author describes six new 
species, in addition to the six previously described by Agassiz. 
The new genus Egertonia, Cocchi, of which there is but one spe- 
cies, is founded upon two specimens which the author found in the 
collections of Sir Philip Egerton and Dr. Bowerbank (and an imper- 
