1880.] NATURAL SCIENCES OF PHILADELPHIA. 339 



EuGLYPHA STRiGOSA. — Compressecl, hirsute forms. Occasional, 

 Usually with about tea teeth to the mouth of tlie shell ; scales 

 distinct ; finel}' hirsute all over except near the mouth. 



1. Length 0.102, b;-eadth 0.072; breadth of mouth 0.021 ; hairs 0.008 long. 



2. " 0.108, " 0.06 ; " " 0.021; •' 0.012 " 



EuGLYPHA BBACHIATA — One emptj^ shell observed, with but one 

 divergent spine, and five or six teeth to the mouth. 

 1. Length 0.102; breadth 0.04 ; breadth of mouth 0.012 ; length of spine 0.042. 



EuGLYPHA CRiSTATA. — One empty shell, with acute fundu=;,but 

 without spines, and four teeth to the mouth. 



1. Length 0.54 ; breadth 0.012; breadth of mouth 0.009. 



EuGLYPHA ciLiATA. — Comprcsscd forms, with short spines or 

 hairs along the acute lateral borders. Rare. Nucleus 0.018. 



1. Length 0.108; bre.idth 0.06 ; breadth of mouth 0.021 ; hairs or spines 0.012 



long. Ten teeth lo mouih of the shell. 



2. Length 0.102; breadth 0.072; breadth of mouth 024; spines 0.008 long. 



Nucleus of sarcode disiinctly and uniformly granular (breaking up 

 into spores?), 0.018 diameter. Ten or twelve teeth to mouth of the 

 shell. 



Placocista spinosa. — One specimen observed, living, but the 

 ample sarcode contracted and containing a transversely oval nucleus 

 with two nucleoli. 

 1. Length 0.084, breadth 0.054; breadth of mouth 0.021. Lateral spines 



short, hair-like, single or in pairs, 0.009 long. Nucleus 0.021 by 0.018 : 



nucleoli O.OOo. 



AssuLiNA SEMINULUM. — Moderately frequent ; from nearl}' 

 colorless to dark brown, mostly lighter at or near the mouth. 

 Living and dead specimens observed. 



1. Length 042, breadth 0.036, breadth of mouth 0.012. 



Trinema enchelys. — FrequeiTt and of varied form and size, 

 though none of the largest variety observed. Usuall}' pyriform ; 

 often oval ; rarel}^ obovoid; of varied pi-oportionate length and 

 breadth, of narrowing opposite the mouth, and degree of obliquity-. 

 Most!}' dead shells, though frequent living individuals observed 

 Ranging from 0.024 to 0.0T2 in length. Specimens presented the 

 following measurements. 



