McGee and Call — Loss of Des Moines, Iowa. 209 



actual continuity was traced in the street excavations. The 

 next following section is on the opposite side of the street, and 

 the principal members were unquestionably continuous with 

 graded. 



andy clay containing numerous 



with loss-kindchei 



-Loss, light buff, somewhat sandy and pebbly above, contain 



V.ss-kin.l.-iHh. tuU'let^ unci fossils. Six feet 



mgi 



The following are some of the species here found : 

 Succinea obliqua Sar. Hyalina arborea Say. 



Succifiea avara Say. * Vallonia pulcheUa Mull. 



*Helicina occulta Say. *Patula strigosa Gould. 



Lhit ,,(>[, It !/hu hinoillx Say. Patula Ktriatella Anth. 



Lhiui<>)>f,ysa desidiosa Say. Patula altemata Say. 



* Pup, i muscorum Linn. Strobila labyrinthica Say. 



Pupa pentadon (?) Say. Mesodon clausa Say. 



A like sequence was observed in a number of other sections 

 in the vicinity; and drift, sometimes modified superficially, but 

 containing many erratic bowlders up to three feet in diameter 

 on or near the surface, was found to prevail over the entire 

 ! Capitol Hill. The proportion of pebbles in this 

 drift is less, however, than is usual in this latitude; the clay 

 presents a somewhat loss-like aspect, contains calcareous con- 

 cretions and yields a calcareous efflorescence ; and the topog- 

 raphy assumed is essentially identical with that of loss areas. 

 The plateau north of Capitol Hill (generally known as North 

 ' ' capped with drift of the aspect described ; and 

 >ss crops out along the bluffs overlooking the 

 J >es M tines river. A general section here by the junior author* 

 reposing on drift on both sides of the river. 

 That on the east yielded the following fossils: 

 Xuorhwt (M'xpKt Sar. Pit/Hi annifera Say. 



l/'titiinyhijs,). !,<(,,,'>!'<■< Say. Pupa pentadon Say. 



LnunnphiiAii <l,s'i,r,,.^i Say. Hyalina arborea Say. 

 *ILU<-lna 'occulta Say. * Vallonia puh-hrfla Mull. 



Patida altemata Say. Stenotrema monodon Rack. 



Patula xtrhitella Anth. Helicodiscus lineatus Say. 



■Pa tula, xtrigosa (?) Gould. Strobila labyrinthica Say. 



■Pupa fallax Say. Undetermined fish spine. 





