GENUS EUGLYPHA— EUGLYPHA CRISTATA. 219 



Size. — Ranging' from 0.04 mm. in length by 0.01 mm. in breadth to 

 0.072 mm. in length by 0.02 mm. in breadth. 



Locality. — Frequent in wet sphagnum in the sphagnous and cedar 

 swamps of New Jersey. Obtained at Absecom, Hammonton, Atco, and 

 Malaga, New Jersey. Also found in sphagnum from Alabama. 



Euglypha cristata is a well-marked form, readily distinguishable 

 from the preceding, though I have met with forms of intermediate character 

 which closely related it with Euglyplm alveolata, pi. XXXVII. Usually it 

 is flask- shaped, with evenly rounded fundus and more or less gradually 

 tapering neck, as seen in figs. 1-3. Sometimes it is nearly tubular, 

 especially in the smallest individuals, as represented in fig. 4. 



The structure of the shell is the same as in Euglypha alveolata, as 

 represented in figs. 1,3; but in other instances it has appeared to be com- 

 posed of distinct hexahedral plates, as commonly seen in E. ciliata, and as 

 represented in figs. 2, 4. 



The mouth is more or less contracted, and surrounded by four or six 

 angular teeth, acute or blunt, and serrulated at the sides. 



The summit of the fundus is provided with a tuft of curved, pointed 

 spines diverging in a radiant manner. 



Occasionally, in association with characteristic individuals of Euglypha 

 cristata, I have seen one in all respects like them, but devoid of spines to 

 the fundus. 



The sarcode of Euglypha cristata is identical in character with that of 

 the preceding forms. 



The species is smaller than is usual with the others, ranging from 

 0.04 mm. to 0.071 mm. in length by 0.0 1 mm. to 0.022 mm. in breadth. 



The species is frequent, in association with E. ciliata, etc., in the wet 

 sphagnum of the sphagnous and cedar swamps of New Jersey. 



EUGLYPHA MUCRONATA. 



Plate XXXVII, figs. 11-14. 

 Euglypha mueronata. Leidy : Pr. Ac. Nat. Sc. Phila. 1878, 172. 



Shell like that of Euglypha cristata, but with a conical acute dome, 

 prolonged into a long mucronate spine, sometimes two. Sarcode as in E. 

 alveolata. 



