42 TYPE AMMONITES— VI Dec. 



Nodicoeloceras, nov. ; G. T. A^. crassoides, M.P.G. Coll., No. 

 31616 ; Banington, Upper Lias, Bed 18/19. Button and loop ornament, 

 EL = Li, L2 strongly bident, Li rather slender; identified with Am. 

 crassoides, Simpson sp., T.A. 1913, LXXXIX. 



Similar species : Am. acauthus, d'Orbigny ; Coeloceras fonticulus, 

 T.A. LIX ; Coel. crossleyi, T.A. LX ; Siephanoceras raquiniamim ; Wright, 

 LXXXVII, 7, 8. 



Crassicoeloceras, nov. ; G. T., C. pingue, nov. ; M.P.G. Coll. 

 38015 ; Barrington, U.L. Bed 18/19 ; like Am. crassus, [Coeloceras 

 crassum, T.A. 1918, cxix), but with smaller, closer ribbing; EL = Li, 

 L2 large : suture-line rather florid. 



Similar species : Coeloceras foveatum, Simpson sp., T.A., 1913, 

 LXix ; Am. crassus ; Meneghini, Pal. Lomb. xvi, 3. 



PoRPOCERAS, S.B. 1911, G.T., P. vortex, Simpson sp., T.A. I, p. v, 

 PI. XXIXa. 



Similar species : Am. subarmatus. Young & Bird, 1822, xiii, 3 ; 

 Am. subarmatus ; d'Orbigny, lxxvi ; Hauer, 1856, xv, 6, 7 ; Meneghini 

 Pal. Lomb., xiv, 5 ; Dumortier, iv, xxviii, 6 — 9 ; Stephanoceras 

 subarmatum ; Wright, lxxxv, i ; Steph. crassum ; Wright, lxxxvi, 

 I, 2 ; Ammonites acanthopsis, d'Orbigny, 1S50 ; Collina linae, Parisch 

 & Viale, 1906, x, 9, 10 ; P. verticosum, P. vorticellum, T.A. [Barrington, 

 Upper Lias, Bed 18/19]. 



Vernnidactylites, nov. ; G.T., Mus. Pract. G. Coll., No. 38016 ; 

 Barrington, U.L., Bed 20, identified with Am. vermis, Simpson sp. 

 T.A. LXVIIL Polygyral, subquadratigyral, multiparvulicostate ; 

 EL > Li, L2 trident. 



Toxodactylites, nov. ; G. T., T. toxophorus, nov. Barrington 

 Upper Lias, Bed 22. M.P.G. Coll., No. 38017. Like Am. holandrei, 

 d'Orbigny, but with smaller, less prominent ribs and somewhat 

 different suture-line. 



Ribs arcuate over venter ; EL = Li, L2 almost to guide-line, 

 bident. 



Leptodactylites, nov.; G. T., L. leptum, M.P.G. Coll. No. 

 38018 ; Barrington, U.L., Bed 23 ; a leptogyral form like Am. rari- 

 strialus, Quenstedt, 1885, xlvi, 5 (lectotype as having fewest ribs), 

 but is more costate. 



SpiniccBloceras, nov. ; G. T., S. spicatum, nov., M.P.G. Coll., 

 No. 38019 ; Barrington, U.L., Bed 23. Somewhat like Am. dayi, 

 Reynes, 1868, v, 7, but different proportions and s.l. more florid ; 

 EL < Li ; L2 trident ; fibulate ornament passing to spinous and then 

 to costate. 



Similar species. Am. annuliferus, Simpson, T.A. LXIII ; Am. 

 desplacei ; Meneghini, Pal. Lomb., xvi, 5, 7, 8, (7, 8 = Coeloceras annu- 

 latiforme. Men. 1899). 



Lobodactylites, nov. ; G. T., L. lobatum, nov. ; M.P.G. Coll. 

 No. 38020 ; Barrington, Bed 24 ; somewhat similar to Am. crassus, 

 but less cadiconic and with highly complex suture-line : EL = Li = L2. 



Peridactylites, nov. ; G. T., P. consimllis, nov. ; M.P.G. 

 Coll. 38021 ; Barrington, U.L., Bed 24. Aspect of Vermisphinctes, 

 T.A 1920, CLXII, but without constrictions. Ribs slightly arcuate 

 over rounded venter ; parvuHnodate ? ; EL < < Li, L2 short, trident. 



Similar species : Am. holandrei ; Dumortier, iv, xxvii, i. 



Multicoeloceras, nov.; G. T., M. multum, nov.; M.P.G. 

 Coll., No. 38022 ; Barrington, U.L., Bed 26. Like Am. crassus, but 



