Royal Societv. 457 
fo very brittle, that in digging, one of the valves vvill frequently 
ieparate from the other, it being plain they were united together, 
from the valves correfponding exadly ; the Dr. dug up ieveral 
that were entire, nay lome double oyfters, with all their valves 
united 5 it is obfervable that there is no lea near the place where 
tbefe fhells are found. 
^n Account of Giants 5 ly 2)r. Tho. Molyneux. Phil. Tranf. 
N° 2^0. p. 487- 
T KE Os Frontis in the anatomical fchool at Leyden^ tho' 
fo prodigioufly large, cannot in the leaft be fufpe^led to 
apertain to any other animal than a man, by its being complete 
every way, and anfwering in all particulars to the common fore- 
head bone of a man, excepting its magnitude; and efpecially 
when we confider that the Os Frontis of a man is of fo peculiar 
a make, from the globofe fhape of the head, that there is not to 
be found a bone among all the animals of the creation, that bears 
2 refemblance to its figure, excepting that of a monkey 5 but all 
this Genus being of a much fmaller fize than a man, gives us no 
umbrage or fcruple : In order rightly to underliand and to form 
a clear conception, both of rhe agreement in fliape and the re- 
markable difference in fize between this large Os Frontis, and 
the fame bone in a man of ordinary ftature j and the better to 
apprehend what deductions may be made from hence, to deter- 
mine the true height of the perfon, to whom it formerly be- 
longed 5 Plate XIII. Fig. 16. Ihews the common fliape and fize 
of the forehead bone of a man of an ordinary ftature, with its 
convex or outfide forwards 5 abode i\\^ line the coronal future 
makes with its indentures, and which furrounds the upper edge of 
the bone, and by which it is joined to both the Ojfa Sregmatis 
or VerticiS'^ 6" the place where the coronal and fagittal futures 
meet ; /, the part to which the bones of the nole are faftened 5 
gg the upper part of the orbits of the eyes 5 h h the Foramina 
m the bone over the eyes, that give a paffage to the two large 
branches of nerves that fupply the frontal mufcle, and thofe of the 
eye-brows 5 /'/ the two proceffes, or protuberances, that join with 
the firft bone of the upper jaw, which by fome accident were 
broken off the large bone, and therefore are not exprefled in 
Fig. 175 the meafure round the ambit of the coronal future from 
^ to^ was 10 To inches 5 in this bone, from <:, where the coronal 
and fagittal futures meet to/, where the bones of the nofe are fat- 
tened 4i- inches 3 from ^ drawing a tranfverle line crofs the fore- 
head tod 6 inches 5 the thicknefs of the bone was about \ of an inch. 
Vol. III. M ra m Fig. 
