110 HYDROZOIDS AND CORALS. 



Z. acuta was first recorded from Missouri by Winchell. 

 The mention of this species in the same connection with Z. 

 ida, with the locality given as Clarksville, has led some to be- 

 lieve that Z. ida was the species noted from the State ; whereas 

 WinchelFs species was actually from Indiana, and is not known 

 as yet west of the Mississippi river. Besides, Z. ida is a very 

 different form. Z. parasitica, recently described by Worthen 

 from the same place, appears to be merely an immature indi 

 vidual that is attached to the shell of a brachiopod. 



Zaphrentis calceola White & Whitfield. 



Lophophyllum calceola White & Whitfield, 1862 ; Proc. Boston Soc. Nat. 

 Hist., vol. Vill, p. 305. 



Zaphrentis calceola White, 1883 ; U. S. Geol. and Geog. Sur. Ter , 12th 

 Ann. Rep., p. 156, pi. xxxix, figs. 6a-d. 



Zaphrtniis calyculus Miller, 1891; Geol. Sur. Indiana, 17th Ann. Rep., 

 i dv. sheets, p. 10, pi. i. figs. 13-14. 



Corallum small, subturbinate, more or less curved, moder- 

 ately but irregularly expanding from the base upward on the 

 outer side of the curvature, especially at the lower portion, but 

 elsewhere somewhat regularly rounded ; apex small, pointed. 

 Calyx moderately deep ; principal lamelli© about 32 in number ; 

 fossette subcentral, but extending toward the side of the con- 

 vex curve of the corallum. Surface rugose from unequal 

 growth. Extreme length of an average example, 18 millime- 

 ters ; diameter of the calyx, about nine millimeters. 



Horizon and localities Lower Carboniferous, Kinderhook 



limestone: Sedalia, Clarksville, Hannibal, Louisiana; also 

 Burlington (Iowa). 



This form was originally described from Burlington, Iowa. 

 The above is Dr. White's description of the specimens ob- 

 tained by Professor Broadhead at Sedalia, in the upper portion 

 of the Chouteau limestone. 



