704 MESSES. S. S. BTJCKMAN AND E. WILSON [Nov. 1 896, 



Dtindey MoLLuscA (continued). 



Lima alticosta, Chap. & Dew. ' Upper part of Humphriesianum-zone.' 

 „ cequilatera, Buv. 

 „ educta, Whidb. 



„ plebeia, Chap. & Dew. ' Ironshot Oolite.' 

 t „ poetica, Whidb. 

 „ rigida, Sow. 



„ semicircular is, Groldf. 'Humphriesianum-zone.' 

 Lucina burtonensis, Lycett. 



\Macrodon rapidus, Whidb. 'Humphriesianum-zone.' 

 iMyacites subsidens, Whidb. 

 fMyoconcha unguis, Whidb. 



„ implana, Whidb. 



iMytilus striatissimus, Whidb. 

 iNucula nuciformis, Whidb. 

 Ostrea explanata, Goldf. ' Humphriesianum-zone.' 



„ palmetta, Sow., var. montiformis, Whidb. 

 JPecten aratus, Waagen. ' Humphriesianum-zone.' 

 ? „ cornutus, Quenst. 

 „ fenestralis, Whidb. 

 „ IcBviradiatus, Waag. 

 t „ spinicostatus, Etheridge. ' Beds above the Ironshot Oolite 



belonging to the higher part of the Humphriesianum-zone.' 

 iPholadomya ccdlcea, Whidb. ' Ironshot beds.' 

 t „ fortis, Whidb. 



t ,, spatiosa, Whidb. ' Ironshot beds of Humphriesianum-zone.' 



t Pinna dundriensis, Whidb. 

 iPlacuna sagittalis, Whidb. 



iPlicatula Sollasi, Whidb. ' Humphriesianum-zowe, upper part.' 

 Placunopsis semistriata, Bean. 

 * Shabdocidaris Thurmanni, var. repens, Whidb. ' Upper beds of 



Humphriesianum-zone' 

 t Sphcera fimbriata, Whidb. 



Spondylus nidulans, E. Desl. ' Humphriesianum-zone' 

 t Terebratula Tawneyi, Whidb. ' Upper beds of Humphriesianum-zone'. 

 t TJiracia leguminosa, Whidb. 



* Figured specimens. t Type-specimens. 



VII. The Coeeelation of the Dttndey Steata with the Kocks of 



THE CoTTESWOLD AND D0ESET-S0MEESET AeEAS. 



In four parallel columns in Table VI. the following informa- 

 tion is given : — 



I. The time divisions — the sequence of hemerse. 

 II. The sequence of deposits in the Cottes wolds which have been 

 laid down during these hemerse. 



III. The sequence of Dundry deposits. 



IV. The sequence of strata found in the Dorset-Somerset area, 



south of the Mendips. 



Thus in these four parallel columns the contemporaneous deposits 

 of each district may be noted side by side. Our remarks upon 

 the comparative development of the deposits in the different areas 

 will be found incorporated in the following pages. 



