from the " Cambridge Greensand." 303 



Frondicularia Parkeri, Reuss. 



Irondicularia Parkeri, Reuss, 1862, Sitzungsb. d. k. Ak. Wiss. Wieu, 

 vol. xlvi. p. 91, pi. xii. tig-. 7; Chapman, 1894, Journ. R. Micr. 

 Soc. p. 157, pi. iii. fig. 17. 



Four good specimens of this species were found at Swaff- 

 ham, one of which bears upon its lateral surface the initial 

 chambers of Vitriwebbina Sollasi. 



Frondicularia guesfphalica, Reuss. 



Frondicularia guestphalica, Reuss, 1860, Sitzungsb. d. k. Ak. Wiss. 

 Wien, vol. xl. p. 195, pi. vi. tig-. 2; Chapman, 1894, Journ. R. Micr. 

 Soc. p. 158, pi. iv. fig. 2. 



Two specimens from SvvafFl 



lam. 



Frondicularia striga, sp. n. (Fig. 1.) 



Lateral outline of test subovate, acuminate ; the oral end 

 more produced ; complanate, with the surface nearly even, 

 but relieved by two strong riblets running vertically down 

 the middle of the test and covering the oral terminations of 



Fig. 1. 



Frondicularia striga, sp. n. x 15. 



each chamber. The margins of the chambers not marked 

 by very strong shell- thickening as in some species having 

 the same general outline. Edge of the test slightly grooved. 

 The shell-surface under a high power appears finely granu- 

 lated or rippled. Length of type specimen 1*9 millim. ; 

 breadth 1'4 millim.; thickness of edge *13o millim. 



This species appears to be quite distinct from any pre- 

 viously figured. In outline it somewhat resembles F. perovata, 

 Chapman *, but is not so regularly ovate, and the sutural 

 margins of the chambers are not incurved towards the aboral 

 * Journ. R. Micr. Soc. 1894, pp. 158, 159, pi. iv. figs. 5 a, b. 



