Botany and Zoology. 457 
bonensis, and he has since made it the type of a genus Miodon, which 
Was anticipated by Urobelus of Reinhardt. The very anterior position 
the grooved tooth, which has but three solid ones in front of it, sug- 
ge the yet undiscovered point of ora from Asinea to the Proie- 
roglypha. Microsoma Jan, is an Elapid of the same region, possessing 
Many of the peculiarities of Urobelus. 
There are probably three, we two, genera of this group in South 
America besides Jan’s Elapom mojus ; they are Apostolepis, Hlapomorphus 
verus, and Phalotris,*® corr esponding to the sections marked by asterisks 
in the table on p. 42. 
Homulocranium was referred to Tantilla of Bd. & Girard on the 
ground of priority of the latter in 1861 "' of this, Prof. Jan does not seem 
to be aware. He describes an H. Wagneri, said to have been brought from 
Florida, which probably does not belong to the genus on account of its 
se * nal scutum. lapotinus, descri as new, and allied to Hlapo- 
us, is also near to Tuntilla as far as the characters given enable us 
to decide. The posterior superior maxillaries are not grooved ; if other 
differences exist, we are not informed of them. 
aang! head of ee ees Prof. Jan unites a number of 
African Ligous rostra ( Tao hynchus a ‘oonioe 
in nse must be placed near Proteie ray. orhina De Fil. 
is Sympholis Cope, of prior date, Dr. ge je eateaslon ot the posi- 
tion of Ficimia Gray is as interesting as unexpected ; Amblymetopon of 
Giinther has never been properly separated foes “se if a difference exists, 
We will accept for the present Zzorhina Jan, but his Oryrhina is Chio- 
nactis Cope (long ago characterized by Hallowell), and <Achirhina is 
Toluca Kenn., also of prior date. Then there must be added Conopsis, 
and perhaps prot iides of Ginther,’* Sonora Baird & Girard, and 
lopium and Chilomeniscus of the writer. 
I. Internasal plates wanting. 
Rostra] plate in — with frontal, - : - Ficimia. 
Rostral plate not in contact with frontal, : 
Loreal none, “anal divided, : : - : - Conopsis, 
Loreal prese 
» Anal divided, nasal separat - Ezorhina. 
Anal e asal pan Arp with first: upper tphial, = : Sympholis. 
Il. Jnternasals gr ge with nasals. 
Dentition glyphodont, - Stenorhina. 
Dentition eb agp muzzle shoved: like, . - - Chilomeniscus. 
«Pr. A. N. 8. Phil., 1861, p. 524. p- 74. 
asa aa accessions of material will probably i ce the union of some of the 
oA, Ann. Mag. Nat. Hist. 1863, p. 21. 
