745 



Sp. 74. T. FLUCTUOSA (pi. clxiii. f. 163), Gould, Invert. Mass. 

 p. 89. f. 50. 



Tap. testa parva, tenui, compressa, ovali, pallide fulva, minute 

 radiatim striata, postice Isevigata, margine dorsali depresso, recti- 

 usculo ; latere postico oblongo, subtruncato, margine iuterno cre- 

 nulato. 



A small, thin, flattish-oblong shell, of a pale colour, minutely 

 striated in both directions, but most conspicuously radiating from 

 the umboes. 



Sp. 75. T. Mero^formis (pi. clxiii. f. 160), 8owerly,jun. 



Tap. testa solida, subcompressa, insequaliter subtrigona, leviter 

 rotundatim sulcata, ad umbones laevigata, omnino pallide fulva, 

 medio et prope umbones castaneo marmorata ; latere antico brevi ; 

 lunula depressa, lanceolata, polita, declivi ; latere postico subelon- 

 gato, subtruncato ; margine dorsali declivi, late depresso, nitente. 



A fine species recently received by Mr. Cuming, at first sight 

 very nearly resembling a Meroe, but wanting the deep incision of 

 the dorsal margin characteristic of that genus. 



