Original description of Turbine ser is or : 
•The. c ora Hum is pedunculate , tall, narrow, conical, and 
compressed. 
The calice is elliptical in outline and deep. 
The septa are slightly exsert, crowded, alternately large 
and small, and they pass down deeply into the fossa. 
Their laminae diminish in si ze from the margin inwards. 
There are five cycles of septa in six systems. 
The ay napt iculae are scanty. 
The costae are delicate, close, subequal, and the larger 
are flat and faintly granular* All are connected hy numerous 
horizontal and sometimes oblique synapt iculae* 
The wall is very thick. Spi theca quite rudimentary. 
He ight 33 mm. Length of calice 23 mm. Breadth 15 mm 
