Maryland Geological Survey 381 



are one or two very small, oblique, nearly simple lobes near the umbilical 

 margin."— Meek, 1876. 



Type Locality. — Great bend of the Missouri, below Ft. Pierre, South 

 Dakota. 



The species is represented only by fragments, but these retain clearly 

 defined sutures which agree in all essential details with those of Meek's 

 type. 



Occurrence. — Matawan Formation. Camp U & I, Chesapeake and 

 Delaware Canal, Delaware. 



Collection. — Maryland Geological Survey. 



Outside Distribution. — Matawan Formation. Wenonah sand, New 

 Jersev. Pierre. Western Interior. 



Family COSMOCERATIDAE 



Genus SCAPHITES Parkinson 

 [Organic Remains of a Former World, vol. iii, 1811, p. 145] 



Typ e . — S cap /t ites aiq ua lis S o we r by . 



"A fossil coneamerated shell, commencing with spiral turns; the last 

 of which, after being elongated, is reflected towards the spiral part." — 

 Parkinson, 1811. 



" Shell oval, subcircular or elliptic in general outline, more or less com- 

 pressed or sometimes gibbous ; volutions contiguous or variously embrac- 

 ing in young shells, but last one in the adult more or less deflected and 

 extended from the others, and finally curving backward again ; aperture 

 oval or subcircular; lip with a small rim or inflection, but without appen- 

 dages; septa symmetrical, regularly divided into from four to six lobes 

 and sinuses, nearly always with paired branches, excepting the inner 

 lobe, which is often very small, and sometimes simple ; siphonal lobe 

 generally nearly or quite as large as the first lateral ; surface merely 

 costate, or also variously nodose ; periphery rounded, or, in nodose species, 

 often somewhat flattened and margined on each side (especially of the 

 last turn) by a row of larger nodes, rarely with a central row between." — 

 Meek, 187G. 1 



Etymology: aKa<piT^s, a small boat. 



1 Rept. U. S. Geol. Survey, Terr., vol. ix, p. 413. 



25 



