HEADON HILL AND COLWELL BAT IN THE ISLE OF WIGHT. 



Ill 



So far from the Brockenhurst zone having fewer forms common 

 to the Barton than the Headon-Hill marine bed, we consider that 

 it has rather more, as its position at the base of the Middle Headon 

 at AVhitecliff Bay would lead us to expect. Thus, if we take the 

 whole Brockenhurst fauna (including the 15 corals which are mostly 

 special to the zone), we obtain a total of 151 species, of which from 

 74 to 81 pass up from Barton, or a proportion of about one half. 

 Summing up the Headon-Hill forms in the same way — out of a 

 total of 79 species, 23 pass up from Barton beds, or a proportion of 

 29 per cent. But, instead of including the rarer forms, if we take 

 only the more characteristic and abundant species of the Brocken- 

 hurst zone, it would be perhaps a preferable course. 



The following list is a catalogue of the fossils in the "Woodwardian 

 Museum from the Brockenhurst zone, obtained by one of us many 

 years ago at Whitley-Eidge railway-cutting, New Forest ; and it 

 may be taken to include the chief characteristic fossils of the zone. 

 We have found all, except two, in the 2-feet bed at AYhitecliff Bay 

 this summer. 



*Hippocrenes (Scutellaria) ampla. 

 *Riinella rimosa. 



Murex bantouiensis {Ed. MS.). 

 *Typbis pungeus, 

 *Strepsidura armata. 



Cancellaria muricata. 



Pisania (Fusus) labiata. 

 #Clavella (Fusus) longseva. 



Leiostoma ovaturu, 

 ^Cassis ambigua. 

 *Ancillaria buccinoides. 



Pleurotoma transversaria. 



■ cymasa. 



beadonensis. 



* denticida. 



* pyrgota. 



*Voluta decora {Beyr.) = maga 



{Ed.). 

 * spinosa. 



suturalis. 



geminata. 



*Acta3on simulatus. 



Marginella asstuarina. 

 *!N"atica bantoniensis. 

 * Studeri. 



* , var. grossiuscula {Ed. 



MS.), 



* labellata. 



Cbenopus Margerini, var. speci- 

 osus. 



#Infundibulum trocbiforrne = obli- 

 quum {Sow.). 

 Pborus cretifer {Ed. MS.). 

 Ostrea ventilabrum = prona {S. 

 Wood). 

 * Anomia tenuistriata. 

 Pecten bellicostatus, 

 Modiola Nysti. 

 xAvicula media. 

 #Lucina bartonemis {Ed. MS.). 

 x Cardiuru porulosum. 

 Protocardium bantoniense {Ed. 



MS.). 

 Cardita deltoidea. 

 xCytberea incrassata. 



suborbicularis {Ed. 3IS.). 



# Solandri. 



Cyprina Nysti. 

 [*]Crassatella Sowerbyi, var. banto- 

 niensis {Ed. MS.). 

 xCorbula ficus. 



x cuspidata. 



[*]Psammobia compressa, var. arcu- 

 ata {Ed. MS.). 

 Panopsea sulcidosa {Ed. MS.). 

 Madrepora anglica. 

 Dendi'opbyllia. 

 Lobopsammia cariosa. 

 Balanopbyllia granulata. 

 Solenastraea ceHulosa, 



Of this shorter list a proportion of about 50 per cent, pass up 

 from Barton or Bracklesham beds ; so that, taking the whole fauna 

 or the more characteristic members of it only, in either case nearly 

 one half pass up from Barton beds — a very different thing from one 



