18 Messrs. R. B. Newton and G. C. Crick on some 



about 42 mm. (0*50) and the height of the outer whorl about 

 25 mm. (0*30), whereas these proportions in an example 

 of Fontannes's species of 81 mm. in diameter are given as 

 0*45 and 0"31 respectively. 



Loc. Valleys between the villages of Al-Kura and Samma, 

 about 15 miles N.E. of Dihala. 



Perisphinctes cf. abadiensis, Choffat. 

 (PI. III. fig. 2.) 



1893. Perisphinctes abadiensis, P. Choffat, Faune jurass. Portugal, 

 Cephalopodes, l^ re ser., Ammonites du Lusitanien &c. p. 46, pi. xviii. 

 figs. 1, 2. 



1898. Perisphinctes abadiensis, P. Choffat; J. v. Siemiradzki, Palseonto- 

 graphica, Bd. xlv. Lief. 4 & 6, p. 164. 



The crushed remains of an example of about 100 mm. in 

 diameter, exhibiting only a portion of the outer whorl, the 

 inner whorls being obscured by matrix, seems to agree very 

 well with Dacque's figure * of a specimen, from rocks of 

 Kimeridgian age in Somaliland, that he compares with 

 Choffat' s species from Portugal f. Siemiradzki J records the 

 species also from Poland. 



It bears also considerable resemblance to de Loriol's figure § 

 of Perisphinctes polygyratus (Reinecke) from the zone of 

 Oppelia tenuilobata of Oberbuchsitten (Soleure). 



Loc. Valleys between the villages of Al-Kura and Samma, 

 about 15 miles N.E. of Dihala. 



Perisphinctes cf. pottingeri, J. de C. Sowerby, sp. 

 (PI. III. figs. 3 a, b.) 



1840. Ammonites pottingeri, J. de C. Sowerby, Trans. Geol. Soc. [2] 

 vol. v. p. 719, pi. lxi. fig. 10 & expl. of figure. 



1875. Perisphinctes pottingeri (J. de C. Sowerby) ; W. Waagen, Ju- 

 rassic Fauna of Kutch, vol. i. Cephalopoda, pt. 4, p. 183, pi. li. 

 figs. 1 a, b. 



1894. Perisphinctes pottingeri (J. de C. Sowerby) ; K. Futterer, Zeitschr. 

 Deutsch. geol. Gesell. Bd. xlvi. p. 7, pi. i. fig. 2. 



1898. Perisphinctes pottingeri (J. de C. Sowerby) ; J. v. Siemiradzki, 

 Palaeontographica, Bd. xlv. Lief. 2 & 3, p. 157. 



A fragment of a whorl about 32 mm. long exhibits rather 



• E. Dacque, Beitr. zur Palaont. u. Geol., Oesterr.-Ung. &c. Bd. xvii. 

 Heft 3 & 4, 1905, p. 148, pi. xv. figs. 15 a, b. 



f Paul Choffat, loc. cit. 



X J. v. Siemiradzki, loc. cit. 



§ P. de Loriol, u Monographie paleontologique des couches de la zone 

 a Ammonites tenuilobatus (Badener Schichten) d'Oberbuchsitten et de 

 Wengen (Soleure)," pt. i. 1881 (Mem. Soc. Pal. Suisse, vol. vii.), pi. vi. 

 fig. 4. 



