166 Messrs. Parker, J<jnL's, and Brady on 



47. Planularia auris, Defr. PI. X. fig. 74. 

 "Orthoceras Atiris)' Soldani, Testae, vol. i. pt. 2. p. Oi^, pi. 104. fig-. A. 



D'Orb. op. cit. p. 2G0. no. 6. 



" Ilab. Var. a. Kecent in the Adriatic ; fossil at Castel- 

 Arquato. Var. yS. Recent in the Mediterranean." 



This is the Planularia auris of Defrance. See Ann. Xat. 

 Hist. ser. 3. vol. xii. p. 215. no. 107. 



48. Planularia crepidula, Fichtcl & Moll., sp. 

 PI. X. fig. 77. 

 "Nautili Lituitatif Soldani, Testae, vol. i. pt. 1. p. 04, pi. o8. fig. bb. 

 D'Orb. op. cit. p. 260. no. 6. 



" Hob. The Antilles, and, according to Fischer, the Gulf 

 of Tuscany." (Fossil near Sienna, Soldani.) 



[Note. One of the many misprints in the ' Tableau ^Icth. 

 dc Cdphalopodes ' occurs in the reference to this species. 

 " Fig. 66 " is given in D'Orbigny's text ; but this, we think, 

 can only be intended for hh. At p. 292. no. 11, tigs, aa, bh, cc 

 of this plate (all allies of C. crepidula) are refeiTcd to all 

 together as Cristellaria elonyata.'\ 



In Ann. Nat. Hist. ser. 3. vol. v. pp. 114 & 115, Fichtel 

 and Moll's " Nautilus crepidula " is defined as " a delicate, 

 elongate, Marginuline, flattened Cristellaria^'' "which by in- 

 numerable linkings, passes into C. calcar^' and "runs insen- 

 sibly into C. cassis on one hand, and on the other into the 

 Planularian section of the Vaginulince.'''' Soldani's fig. bh and 

 his fig. aa (D'Orbigny's Cristellaria elongata, no. 127) are 

 there referred to as attenuate Cristellarice similar to C. crepi- 

 dula^ F. & M. sp., but keeled. Fig. dd, one of the subcostate 

 Planularian forms, has no keel, and so far satisfies the strict 

 requirements of subvarictal collocation ; but the keeled forms 

 arc no less closely related. (See succeeding note on No. 49.) 

 We are inclined to regard them all as C. crepidula • and if 

 the keeled forms are to be indicated by a name, D'Orbigny's 

 " Cr. elongata'''"^ well serves the turn, having the same rela- 

 tion to C. cultrata that C. crepidula has to C. rotulata. Sol- 

 dani, Testae, vol. ii. Appendix, p. 146, pi. IS. figs. 91, r, 7?, 

 represent a fine C. crejjidula from San Quirico. 



49. Plamdaria rostrata, D'Orb. PI. X. fig. 75. 



"Nautili Lituitati CitspideA-" Scildnni, Testae, vol. i. pt. 1. p. f>4. pi. 58. 

 fig. dd. D'Orb. op. cit. p. 2(10. uo. 7. 



'■^ Ilah. Fossil at Coroncina." (Near Sienna, Soldaui.) 



* The same as D'Orbiguv's Cristellaria lanccolafa. For. Fosp. ^ ion. p. 80, 

 pi. ;{. figs. 41,42. 



