HEADON HILL AND COLWELL BAT IN THE ISLE OE WIGHT. 



121 



Notes relating to Divergences from Prof. Judd's lists of Fossils, with 

 Observations on the Edwards Collection of Middle-Headon Fossils. 



Marginella simplex is not in the Edwards collection as from 

 Barton ; this and the following ten species, viz. Mytilus strigillatus, 

 Borsonia sulcata, Nematura parvula, Trigonoccelia deltoidea, Lucina 

 obesa, L. concava, Carclita oblonga var., Gardium obliquum, Scintilla 

 angusta, and Panopcea subeffusa, are given in one list as occurring in 

 Barton beds ; and in the other list this range is denied to them. 



The range into Barton or Bracklesham beds (as shown by the 

 Edwards collection) has been overlooked in the case of many species 

 (viz. twenty-two) in the lists of Colwell-Bay and Brockenhurst 

 fossils (op. cit. pp. 153-156). 



Voluta depauperata (Sow.) has been cited in error by Eorbes from 

 Colwell Bay ; it occurs only in Barton or Bracklesham beds, and is 

 therefore omitted from our list. V. spinosa (Lam.), type, occurs in 

 Barton and Bracklesham beds ; the form from Brockenhurst and 

 Middle-Headon localities might be recognized as a distinct variety. 



V. tereticosta (Ed. MS.) is plainly only a variety of V. geminata 

 (Sow.) in which the costse are a little less spiny ; all intermediate 

 degrees occur. 



Glavella longwva, var. egregia (Beyr.). Von Konen mentions 

 this from Brockenhurst ; but we find the absence of ridges as rare 

 as in Barton examples, and therefore omit the varietal name. 



Hippocrenes ampla (Sow.) is not in Edw. coll. from Headon Hill 

 or Hordwell ; and we consider it does not occur there. 



Murecc sexdentatus, var. cinctus (Ed. MS.), is labelled in Edw. coll. 

 as from Barton ; but we suspect this to be in error ; it appears to be 

 from Colwell Bay, as in Prof. Judd's lists. 



Natica obovata (Sow.) occurs at Bracklesham, as shown by the 

 Edw. coll. N. grossiuscula (Ed. MS.) is probably only a variety of 

 N. Studeri, as transitions exist between them. iV. dubia (Ed. MS.) 

 we consider only a large variety of iV. lamellata (Lam.). N. epi- 

 glottina (Lam.) is in Edw. coll. labelled as from Hordwell; we 

 found it at Roydon. 



CanceUaria elongata (Nyst) is in Edw. coll, from Headon Hill 

 and Hordwell, and 0. muricata from Hordwell. G. roydonensis 

 (Ed. MS.) seems a doubtful species. 



Cerithium pyrgotum (Ed. MS.) we consider a Lower-Headon form, 

 and omit it therefore. G. varians (Ed. MS.) is in Edw. coll. from 

 Headon Hill. C. cavatum (Ed. MS.) may be only a variety of G. con- 

 cavum ; both it and G. speculatum (Ed. MS.) occur only at Long 

 Mead End, and should be omitted from the list. G. ventricosum 

 (Sow.) is in Edw. coll. from Colwell Bay ; G. subventricosum (Ed. 

 MS.) and G. deperditum ? (Lam.) in Edw. coll. seem to be worn 

 specimens of G. ventricosum ; we agree with Prof. Judd in omitting 

 them. G. marginatum (Ed. MS.), var. recentius (d'Orb.), occurs as 

 in our list ; its title to a distinct specific appellation seems doubtful. 

 G. (Vicarya) concavum (Sow.) is in Edw, coll. labelled as from 



