.14 .unmx amen. [ izc. ARC1‘.EKP.FRAM
side of the lflll. ulnlsl lhnse an the upper side, where the dorsal lnhe is won. are at the same farm as that at the right rnw of [ultra in my ~[n-rimun. I have therelnre no dnnht that the dorsal lobe of the tail was situated an the right side. This is also the dorsal side of thr- lii)1li’.:l~ \rill heuhserved in the specimen.
Where then was the rloncnl npening situated? ln arrurdanre with the news we haw stated, it must naturally have heen hehind the large median plate on the under side of the animaL 'l'lle rmrs of lnlcra du lml hegin nnlill some little distance from the rear of this plate, and this i.~ naturally the sitnatinn at the opening, It is not surprising that we mnunl direr prove th
> in the light at the greatly coliipi‘essml examples at this term.
General Remarks regarding the two New Species of Psammosteus and Other Allied Forms,
The two new species at Psammosteus which are des wed in this
work, Ililfer distinctly lrnm each other by several easily recognisable characters The histalngiral cunstrnctinn ol the cranial skeleton itsell provides the host and surest means at identification: hnt peculiarities ol the outer sunlptnre also appear to he at service.
We will nun' see whether these characters can he employed in differ , at Psmmnosleus and Drppzmaspis. 7 whirh also evidently are rlnsely allied 7 already described.
itinting the nhm'e from rema
As Inentinlled helnret AG.
made 4 species at the genus [{mmmosleus. all ltfl‘etl npnn small fragments with samewhnt rliflerent exlel'iur srnlptnrr:
l’smummleim mm'mlrlr'inus. Ana is thus linsed upon a little frag Inenl h-mn limlngn: lln- lhree ulhers, P32 Inn‘udorus. Act. (n'elmlus. Ar
nnd umlulutus, ,\1.. are hawd npnn small fragments from the Hi distrirt‘,
'i
l'nnizn“ whn lIt|Il n lingo I-nllm-liun at Psamnmslens remains. regarded all at tln se. nmrx- ur less dilh-rentlv urnmneuted fragments as skeletnn ele- Im-nls ul min and the sunn- lnrnL He runsiderml them pa sihly ichlydnrnlites
- unl intern at an ulln'ru'iw nnknnwn vartilaginnns li I, nl' as having
Inn-lunged to tln- vandal part at . walnuts, and pa hly some nther
vnru NW of I’hlcullm‘nm.
I Ann—ll. Mun-r): a“, pm. rm. .1“ \‘iru\ gm range. 1814. pug, 10:1.
l‘.\\| n L'vh :ln l'll|l'lHlt'lll\\'ll 4h: tll'\'(tll. Sy‘ll'lll‘. 1557, page ‘JOnIId [allowing pm, .
