Smithsonian miscellaneous collections . valves) and little or no carbonaceousmaterial. (Several fairly complete valves and several fragmentsof Rangia, not badly worn and with some traces of epidermisremaining, i fragment of Area transversa, l Mtdinia, i wornActaeocina, a few tiny shell fragments.) The results of these two borings made toward the two extremitiesof the fossiliferous part of the cliff at Wailes Bluff are of considerableinterest. They reveal, in the first place, the much greater depth of thePleistocene deposit at Wailes Bluff than at Langleys Bluff—26 feet(plus an undetermined gre
Smithsonian miscellaneous collections . valves) and little or no carbonaceousmaterial. (Several fairly complete valves and several fragmentsof Rangia, not badly worn and with some traces of epidermisremaining, i fragment of Area transversa, l Mtdinia, i wornActaeocina, a few tiny shell fragments.) The results of these two borings made toward the two extremitiesof the fossiliferous part of the cliff at Wailes Bluff are of considerableinterest. They reveal, in the first place, the much greater depth of thePleistocene deposit at Wailes Bluff than at Langleys Bluff—26 feet(plus an undetermined greater depth) as contrasted with 6 to 8 feet(omitting the overlying oyster bed). It has been suggested that ourborings may have penetrated one or more of the older Pleistoceneformations of Maryland—the Wicomico (if the exposed portion isTalbot) or possibly even the Sunderland. In both borings, at a depthvarying from about 10 to 14 feet below beach level, considerable sand SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 121, No. 12, PL. 1. A, Payunis pollicaris (Say); B, tootli of Myliobatis cf. jreint-ircillii Le Sueur,viewed from attached surface; C, Odoiilaspis littonjlis (Mitcliill); I), lower rightpharyngeal of Micropoi/on imdiilatus (Linne), oral surface; E. tail spine of Dasyatiscf. ccntrouriis (Mitchill) ; F, G, skulls of Frioiiotiis aff. cvolaus (Linne) ; H, Lihiiiiadiibia Milne Edwards; I, Hif>poporidra cdax (Busk). All X i^- All from WailesBlufif, bed I. NO. 12 PLEISTOCENE FAUNA, MARYLAND BLAKE IJ was encountered, accompanied by more or less carbonaceous material,both features suggesting shallow-water conditions; somewhat similarconditions were found again at about i8 to 19 feet in the deeper bor-ing. However, except for a few small, badly worn, and nonsignificantfragments of Ostrea and Venus, no material of the species of shal-lower water such as Mya arenaria, Venus mercenaria, or Ostrea vir-ginica was brought up from these depths, as would certainly have beenthe cas
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