Page:Eurypterids of the Devonian Holland Quarry Shale of Ohio.djvu/22

Fig. 53. Ornamentation on posterior part of prosoma of Syntomopterus richardsoni, n. sp., holotype, PE5120; ✕ 2.5. A portion of front margin may be seen at upper left of specimen.

Measurements

Holotype			mm.
	Prosoma length		30.3
	Prosoma width behind eyes		53.0
	Prosoma width at base		58.0
	Compound eyes located on prosoma:
		From anterior margin	14.5
		From posterior margin	11.3
		From lateral margin	17.5
		Distance between eyes	10.5
	Length of eye		3.5
	Width of visual area		1.0
	Width of palpebral lobe		2.0
	Width of rim at anterior of carapace		1.2
Paratype PE5121 (figs. 48, 49, 52)
	Length of compound eye		3.5
	Distance from eye to posterior margin		15.6

Two paratypes (PE5122 and PE5123) retain parts of some of the tergites, probably from the metasoma. These have the same pustular ornamentation that occurs on the prosoma. On the posterior edge