348 Messrs. W. K. Parker and T. R. Jones on the 



Rotalia repanda, F. & M. sp., whose varieties are depauperated on 

 shore, but found to be typically fine in abyssal dredgings. 



(G.) Pp. 1 86, 187, and Supplem. pi. 18. f. 4 & 6, p. 74. " Nau- 

 tilus Beccarii," and "N. Beccarii perversus." Dextral and 

 sinistral forms of Rut alia Beccarii, L. (See above, p. 338.) 



(H.«.) P. 515. " Serpula lobata." Fig. 71 of Walker (Trun- 

 catulina lobatula) is here referred to, also the Serpula nautiloides 

 of Gmelin. The latter is a sessile form of Lituola (Placopsi- 

 Hna). 



Maton and Rackett re-transferred this shell to the nautiloid 

 group after Montagu had placed it among the Serpula. 



(H. b.) Supplem. p. 160. " Serpula concamerata." According 

 to the description given, this is a minute Rotalian form, and 

 may belong to either of the chief sub-groups of the genus Ro- 

 talia (viz. Calcarina, Rotalia proper, Planorbulina, and Trocham- 

 mina). Prof. Williamson (Monogr. p. 52) has used the name 

 Rotalina concamerata as typically indicative of certain forms 

 comprising Rosalina globularis, WOvh., Rotalina Boueana, D'Orb. 

 &c. It appears however, to us, that in Prof. Williamson's pi. 4, 

 figs. 101-103 represent an ordinary specimen of Rotalia repanda, 

 F. & M. (R. Boueana is the same form) ; and that figs. 104 and 

 105 represent Rosalina globularis, which is a variety of Rotalia 

 trochidiformis, Lamarck . 



In our paper on some Norwegian Foraminifera (Ann. N. H. 

 2 ser. vol. xix.), we have also misarranged some of these Rotalia, 

 led by the extreme similarity (as to external form) of the great 

 typical R. repanda (op. cit. pi. 10. fig. 22-24) to R. vesicularis, 

 Lam., which is a flat variety of R. trochidiformis, whilst the 

 smaller form (pi. 1 1. figs. 13, 14) is really a variety of R. tro- 

 chidiformis, being the R. globularis of D'Orb., Modeles, No. 69 

 (not No. 66, as in ' Monogr.' p. 52). 



Prof. Williamson gives no definite reason for his application 

 of this name used by Montagu. We are still of opinion that 

 Montagu in this case referred to some Planorbuline (or Trunca- 

 tulinej form, as we indicated in Ann. N. II. 2 ser. vol. xix. p. 294, 

 note. 



(I.) P. 187, and Supplem. pi. 18. f. 5. "Nautilus crispus." 

 The well-known Polystomella crispa, L. 



(J. a.) P. 189, pi. 15. f. 4, and Supplem. p. 76. "Nautilus 

 Calcar." A characteristic keeled specimen of Cristellaria Calcar, 

 but not essentially distinct from those figured in pi. 18. figs. 7-9, 

 nor from Walker's figs. 66 & 67. The Nautilus rotatus figured 

 in Wood's Catal. and referred to N. Calcar by Maton and 

 Rackett, is a different shell. 



(J. b.) P. 188, and Supplem. pi. 18. f . 7 & 8, p. 75. "Nautilus 

 kevigatulus." A large-sized " pale ferruginous brown " speci- 



