542 



J. W. Jackson — Ti/pe of Pseudomelanifi vittata. 



rock-specimen of Maiistone which, is pi'eserved in the Jermyn Street 

 Museum was obtained.^ 



Westcombe Quarry, near Batcomhe. 

 Thickness in 

 ft. in. 



f Pseudolioceras elegantu- 

 lum (Y. & B.), mido- 

 ceras liildense (Y. & 

 B.), Dactylioceras 

 holandrei (d'Orb.), 

 Feronoceras desplacei ? 

 ' 1 3 -{ (d'Orb.), Cincta 



Lycetti (Davidson), 

 Rhynchoiiella jurensis 

 rtS oiieiL - iiagmcu.= auu I (Queiistedt) , Te?-«- 



bratula sp. (probably 

 new), Syncyclonema, 

 \. sp. 



Bifrontis 

 and Ppart 

 falciftri 



' Limestone, much dis- ^ 

 turbed, grey - bro^ni, 

 with yellowish iron- 

 granules, full of speci- 

 mens of Hildoceras 

 hildense (Y. & B.), 

 shell - fragments and 

 belemnites: seen 



Falciferi 



( Clay, bluish-grey : 

 1 6 inches 



to\ 

 ) 



\ 



3 

 Ok 



Sarpoceras sp. 



Pliensbachian 



-[ 



f Marlstone, top layer full 

 of specimens of Tere- 

 bratula punctata, Sow., 

 and belemnites : seen 



5 Limestone, greyish-blue . 



„ f Clay, bluish-grey : to ^ 



^ { linch / 



[ Amaltheus (fragment), 

 Paltopletiroceras sp., 

 Rhynchonella iimalthei 

 (Quenstedt), JS/i. tetra- 

 hedra {^OVT .) , Terebra- 

 ttila punctata, Sow., 

 Orwthella indentata 

 (Sow.), Ostrea spor- 

 tella (E. Duraortier), 

 5 / Protocardia truncata 

 (Sow.), Syncyclonema 

 sp., Pseudopccten 

 cRqnivalvis (Sow.), 

 Ohlamys Humberti 

 (Dum.), PUwomya 

 Jauherti, Dum.,'- 

 Plicatula pectinoides 

 (Lamarck),^ Cryp- 

 tccnia expansa, Sow. 



Summary. — In the neighbourhood of Batcombethe Marlstone of the 

 Middle Lias is typically developed, and is succeeded by thin alternating 

 layers of clay and limestone, which are in turn followed by pale- 

 yellow fine-grained sands — near Bruton, of considerable thickness. 



VI. — On the Type-specimen- or Pseudomelania vittata (Phillips). 

 By J. Wilfrid Jackson, F.G.S., Assistant Keeper of the Manchester Museum. 



I HAVE recently had the good fortune to come across the lost 

 type-specimen of Phillips' Melania vittata in the course of going 

 through the contents of one of the reserve cabinets in the Manchester 



1 Mem. Geol. Surv., 1893, vol. iii, p. 207 : "The Jurassic Rocks of Britain : The 

 Lias of England and Wales (Yorkshire excepted)." 



- Etudes Pal. sur les Depots Jurassiqtt.es du Bassin du Phoie, 1869, 3ieme pt., 

 pi. xxix, fig. 8. 



^ Ibid., pi. xl, fig. 7. 



