1895.] MICROSCOPICAL JOURNAL. 207 



91. TYMPANICUS. 

 Basal ring with 6 conical feet fibula 



92. TYMPANIDIUM. 

 Sixteen gates, the basal kidney-shaped barbadense 



93. TRIPOSPYRIS. 



Basal plate with 3 pores; feet very long triomma 



Basal plate with 4 pores ; feet club-shaped clavata 



Basal plate with numerous pores ; feet 3-sided, dentate tribrachiata 



94. TRICERASPYRIS. 



Caudal foot the shorter ; feet not forked didicerus 



All 3 feet same length ; feet forked furcata 



95. TRISTYLOSPYRIS. 



Feet cylindrical, long, strongly curved triceros 



96. DIPOSPYRIS. 



Shell thorax -shaped, smooth ; horn and feet equal bipes 



Shell elliptical, spinulate ; horn shorter than feet mystax 



Shell violin-shaped, thorny ; feet S-shaped sigmopodium 



97. BRACHIOSPYRIS. 



Basal plate with 4 large and 4 alternate pairs of smaller pores ocellata 



98. DEUDROSPYRIS. 



Feet cylindrical, straight, divergent stylophora 



Feet cylindrical, more or less curved, convergent dirrhiga 



Feet prismatic, straight, with lateral branches on edges bibrachiata 



99. TETRASPYRIS. 



Shell nearly cubical, smooth cubica 



100. HEXASPYRIS. 



Shell tuberculate ; feet bristle-shaped, short setigera 



Shell tuberculate ; feet thick, with lateral branches butschlii 



Shell spinulate ; feet slender, long articulate 



101. LIRIOSPYRIS. 



Shell nearly spherical, with slight sagittal stricture clathrata 



Shell ovate, with sharp sagittal stricture ; horns fenestrated at base...turrita 



102. CANTHAROSPYRIS. 



Shell tuberculate ; 2 feet larger and longer than the other atenchus 



Shell smooth ; all 6 feet equal and similar radicata 



