- 19 - 



shallower. 



Even greater TJuicertainties attend an effort to po.st- 

 ulate "bottom a. - . . I-'; :her definitely 



statef''., however, thab 0;^" _ar -j..e ."reater ivejorit^' of the pele- 

 e^.-pods are partial to "bottoras oompoeed of sand or fine gravel 

 and therefore it may he acsi^ined th-at in-general the waters 

 were clear and the bottoms frei " ai mud; even the hurro\7ers 

 are those that are usually found on sandy hotto . In this 

 connection the absence of I.'ulinias and related fornis that pre- 

 fer a mud-'. y bottom is not without significance. The few n.iid- 

 loviii ■ bivalves present probably had their station in estuaries^ 

 at the heed of which lived the brscTrish-wator Dreissena . Th.e 

 small o;;ster that is consiaered identical with the recent man- 

 grove-oyster, £. voliiijp may be assigned to the same habitat, if 

 its habits were the ::;n.r:e as those of the recent form. The 

 meager representation or absence of the small j-'eptona.cea and 

 other forms that usually frequent . \ . - in sheltered 



near-shore nijositions or attach themselves to algae, seems to 

 indicate an open coast and rather strong current action. It 

 appears that the greater T:art of the coast was low and interrupt- 

 ed, ?,f. indicated above, by'~gr---few estuaries, ^'IT''' r^ro by head- 

 lands, since the coarse teiitiire of the eedii,ents ';:estifies to 

 rapid erosion in at least part of the area and the nrorrimity 

 of the vni -anic debris from vrhich they were derive'.'. 



