> 
680 TRANS. OF THE ACAD. OF SCIENCE. 
gill-fins representing the ear-cartilages as a manual termination, and, con- 
t authors, not bearing, but merely, as a manubrium, joining, the 
cranium. 
an exsinuate-caudate cleidoid (the incus of higher vertebrates) articulating 
into the temporal glenoidal cavity ; an anterior crescented sla , sutured 
contorted ce zygomatic is aggluti- 
nated to the cleidoid (a blade for the pterygoid fabric), behind which oper- 
ates a lid in likeness of a shovel or scapula—no unmeanin words, as in- 
: : hn 
connection ; beari 
hyo-auditory, the pterygo-facial, and the mandibular. Many 1 
is apparent, only single ossifications ; so are the single teeth as single ver 
. rpa . - th e human han 
are eight (an organo genetic number), in that of certain dolphins are /ive- 
The phalangal bones are eacha ternal-ossification, but in number, as far as 
supernumerary to their respective metacarpals, metatarsals, etc., vary 12 
s 
e@ are, 1 
while the car- 
torpedoes, ete., vary among such organogenetic members 
» 41, 55,—and, as in the ichthyosauri, are often ramified in the fan- 
expanse of the fins. ing a 
n insects, the insection of limbs frequently has this form: fronting 
belt bearing a limb, we perceive a plate of tabulate mail, ana 
and i 
to which is attached, in angular continuity, a long “femur”—or the true s- 
e or i 
e 4, 3, 5, and, in antenna, higher organogenetic numb 
elements, (each higher one the sum of the two previous ones). 
neural and ventral arches, their costal type differs least from the insected 
