232 FEESH-WATEE EHIZOPODS OF NOETH AMEEICA. 



Globular forms of Sphenoderia lenta range from 0.033 mm. to 0.055 mm. 

 in diameter ; oval forms from 0.0285 mm. to 0.0625 mm. long by 0.02 mm. 

 to 0.0454 mm broad. 



SPHENODERIA MACROLEPIS. 



Shell pyriform, compressed, with a broad neck gradually extending 

 from the body, and terminating in the oblique elliptical mouth, and with 

 the broader surfaces composed mainly by a pair of large hexahedral plates, 

 from which the neck is extended below. 



Size. — From 0.02 mm. to 0.028 mm in length. 



Locality. — Sphagnum of the cedar swamps of New Jersey. 



Not until a comparatively recent date, and since the present work was 

 going through the press, I have discovered what appears to be a second and 

 quite distinct species of Sphenoderia. It was found in association with S. 

 lenta, in sphagnum of several localities in New Jersey, but especially in that 

 of the cedar swamp at Malaga, Gloucester County. It is probably not uncom- 

 mon, but may be easily overlooked, for it differs little in size and form from 

 S. lenta, and the peculiar structure of the shell in the living animal is 

 obscured by the presence of the sarcode. 



The shell is moderately compressed pyriform, and varies little in shape 

 or size. It usually measures 0.024 mm. in length by 0.016 mm. in the 

 greater and 0.012 mm. in the less breadth. 



The neck tapers from the body of the shell, but in other respects appears 

 to have the same characters as in S. lenta, and in the narrower side view of 

 the shell it presents the wedge-like outline characteristic of the genus. 



The delicate colorless shell when empty distinctly exhibits, on the 

 broader sides of the body, a pair of large hexahedral plates, one above the 



other, as represented in the adjoining woodcut. 

 Another less distinct plate occupies the fundus 

 above the preceding, and a pair of smaller lozenge- 

 like plates apparently occupy the inteiwals laterally 

 of the two pairs of broad hexagonal plates. The 

 shell of sphmmkria mncrohpis. neck is prolonged below the position of the body- 

 plates, and appears to be devoid of distinct or separate plates. 



The interior sarcode of S. macrolepis is identical in character with that, 

 of S. lenta. 



