MARYLAND GEOLOGICAL SURVEY 305 



obliquely sloping to the volution within it, giving the depressed spire. 

 Aperture trapezoidal. Substances of the shell thick, the surface trans- 

 versely striated on the top and below, with frequent strongly marked 

 undulations on the flattened side and back of the volution. 



The above description is based upon fairly well preserved examples of 

 this species from the Beekmantown of the Champlain Valley, described 

 and illustrated by Whitfield as Ophileta complanata. Typical Ophileta 

 complanata is quite a different shell, as can be noted by a comparison of 

 the figures on plates XXXI and XXXIIL 



Occurrence. BEEKMANTOWN LIMESTONE (Cryptozoon steeli zone). 

 Poor casts in the rock or in the form of natural sections. Hagerstown, 

 etc., Maryland and various localities in Pennsylvania. 



Collection. U. S. National Museum. 



Genus EGGYLIOMPHALUS Portlock 



ECCYLIOMPHALUS MULTTSEPTARIUS Cleland 



Plate XXXI, Figs. 20, 21;' Plate XXXIV, Figs. 3, 4 



Ecculiomphalus multiseptarius Cleland, 1900, Bull. Amer. Pal., vol. iii, 



p. 123 (251), pi. xv, figs. 1-4. 

 Ecculiomphalus multiseptarius Cleland, 1903, Bull. Amer. Pal., vol. iv, 



p. 17. 



Description. The shell of this species is discoid and consists of two 

 or more loosely coiled, slender volutions which gradually expand until 

 the outer portion is 6 mm. in diameter in a specimen of 20 mm. width. 

 In transverse section the outer coil of the shell is subovate and slightly 

 carinated on the outer edge. 



The specific name refers to the partitions shown in natural section of 

 the shell which give it the aspect of a cephalopod, but the curvature and 

 the irregularity of these partitions will distinguish them from septa. 

 Such partitions are known in other species of the genus and indeed form 

 a generic character. They are especially well developed in the present 

 species. 



Occurrence. BEEKMANTOWN LIMESTONE (Stonehenge member). 

 Rare in both the lower and upper divisions of the Stonehenge member 



