166 Messrs. Parker, Jones, and Brady on 



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



" Orthoceras Auris ;" Soldani, Testae, vol. i. pt. 2. p. 98, pi. 104. fig. A. 

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



^^ Hah. Var. «. Eecent in tlie Adriatic; fossil at Castel- 

 Arquato. Var. ^. Eecent in the Mediterranean." 



This is the Flanularia auris of Defrance. See Ann. Nat. 

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



48. Planularia crepidula^ Fichtel & Moll., sp. 

 PL X. fig. 77. 



"Nautili Lituitatif Soldani, Testae, vol. i. pt. 1. p, 64, pi. 58. fig. bh. 

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



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

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



[Note. One of the many misprints in the ' Tableau Mefch. 

 de C^phalopodes ' 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, figs, aa, hh, cc 

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

 together as Cristellaria elongata.^ 



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

 and Moll's ^^ Nautilus crejpidida'''' 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 

 Plauulariau section of the VaginuUnce.'''' Soldani's fig. hh 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 subvarietal collocation ; but the keeled forms 

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

 We are inclined to regard them all as C. cre])idida\ and if 

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

 " Gr. elongata^'"^ well serves the tmii, having the same rela- 

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

 dani, Testae, vol. ii. Appendix, p. 146, pi. 18. figs. 91, /•, i?, 

 represent a fine C. crepidula from San Quirico. 



49. Planularia 7'ostrata, D'Orb. PI. X. fig. 75. 



"Nautili Lituitati Cuspides;" Soldani, Testae, vol. i. pt. 1. p. 64, pi. 58. 

 fig. dd. D'Orb. op. cit. p. 260. no. 7. 



" Hah. Fossil at Coroncina." (Near Sienna, Soldani.) 



* The same as D'Orbignv's Cristellaria lanceolata, For. Foss. Yien. p. 89, 

 pi. 3. tigs. 41, 42. 



