37 
Part! Of Quadruped's. 
branched Sutures, and the Alternate commiffures ot the Bones. 
Anfwerable to the Rule of Nature,in a Humane Skull: and 
of Art, m the laying of Stones in Buildings ; and in cover¬ 
ing of broader Vaults, not with one Arch, but feveral Idler 
ones, for the greater llrength. 
A leffer C H E QU E R’D SHELL. Perhaps St ell at a 
Wormii , (a) or a kin to it. The Convex work is compo- M Sce his 
fed of black and citrine pieces, cancellated, and tranfverlly M “d“ m - 
notched; ten, eleven, or twelve of them meeting in a 
fquare, and rugged centre; each looking like a Star fur- 
rounded with Rays. The feveral Area’s rife up into a con¬ 
vexity fomewhat greater, than in the Shell above deferib’d. 
Juft before the Tail, the edges are bended a little upward 5 
over the Tail, downward. The Belly-piece is joyned to the 
Back-piece for the length of two inches and ;, with the 
edges turned upward. The middle of it flat, ftreak’d, and 
cancellated; the hinder part endeth in a double broad 
point. 
Two more CHEQUER’D SHELLS of the fame 
Species ; Living, That here are not fo great a number of 
Rays to each Star. 
Another of the fame ; excepting, that the feveral arched 
pieces are not fo high, as in the former. 
A CHE QUER’D-S HELL, from Suranam. I think 
no where defcnb’d,or figur’d,unlefs perhaps by Mofchardus. 
The convex work is compofed of black and citrine pieces,in 
the Margin, of a Pyramidal or wedged Figure, oppofitely 
fet, and with tranfverfe Notches: amongft which there are 
alfo little fquare, rugged, and citrine pieces intermixed. 
All the reft, which are alfo black and citrine, are fix times 
as big, adorned not with tranfverfe but paralell Notches. 
Neither are they Radiated, but feveral of the fame kind 
contiguous fide to fide. They are compos’d into Area’s 
almoft flat: the centres whereof are alfo rugged, but much 
bigger than in the Shell laft deferibed. The Belly-piece is 
alfo lefs convex. 
Another of the fame Species. 
Another CHEQUER’D SHELL from Suranam , 
of kin to the laft defcrib’d. The edges of this are round 
about, excepting before, turn’d up outward. The Back alfo 
is lefs convex ; the Belly, more deep. 
Another 
