242 Messrs. Parker, Jones, and Brady on 



114. RohuUna calcavj Linn^, sp. PI. X. fig. 96. 



" Nautilus ;9^/;;?7/o*MS ;" Soldani, Testae, vol. i. pt. 1. p. r.o, pi. 59. figs, qq, 

 rr. D'Orb. op. cit. p. 289. no. 12. 



" JIah. The Adriatic, near Rimini." (Fossil near Sienna, 

 Boldani.) 



This is a keeled but tuberculate variety *, and can scarcely 

 be accepted as the re})resentative of the t}^c. It resembles 

 more or less several of Fichtel and Moll's varieties, approaching 

 their var. e most nearly. Their Xautilus pa^nllosus is granular 

 on the septa, and lacks the spinous armature of the keel, and 

 thus differs from Soldani's figures under the same name. We 

 shall do best to accept the trivial name appended by Montfort 

 to his copy of Fichtel and Moll's drawing (pi. 12. figs. a-c)j 

 Cristellaria rostrataj Montf. sp. 



115. RohuUna aculeata, D'Orb. PI. X. fig. 91. 



"Nautili carinati {Lentieiilfv) ;" Soldani, Testae, vol. i. pt. 1. p. G4, pi. 58. 

 figs. Jih, mm. D'Orb. op. cit. p. 2^9. no. 14. 



" Hah. The Adriatic, near Rimini." (Fossil near Sienna, 

 Soldani.) 



Two forms of the tj^ical Cristellaria caJcar. 



116. RohuUna Flanciana, D'Orb. PI. XII. fig. 157. 



"Lentieulae;" Soldani, Testae, vol. ii. (not i. pt. 2) p. 110, pi. 26, fig. O. 

 D'Orb. op. cit. p. 290. no. 20. 



Hah. " Fossil in the neighbourhood of Sienna." (Clusen- 

 tini, Soldani.) 



This is a lenticular, umbilicateXo«/o;n'«rt, scarcely so thick 

 relatively as most specimens of X. umhilicatula., but hardly 

 worth separating from that species. 



117. RohuUna rugosa, D'Orb. PI. IX. fig. 31. 



" Lenticulpe;" Soldani, Testae, vol. ii. (not i. pt. 2) p. 110, pi. 26. fig. N. 

 D'Orb. op. cit. p. 290. no. 21. 



" Hah. Fossil in the neighboiuliood of Sienna.'' 



A nautiloid Lifuola, sublenticular, and depressed at the 

 umbilicus ; septation entirely obscm-ed by the rough toxtm-e 

 of the exterior t. This may be accepted as a varietal form, 

 closely allied to L. canariennis. 



• Also Soldani. Sag. Oritt. p. 98, v>\. 1. figs. 0. J. 



t If the obsounUion of tlio shell be due to rock-iuatri.\, it may be 

 doubtfully referred to ('rislrllfiria. 



