PLATE 6 
Fics. 1a—d. Plaster cast of the type specimen Orbigny’s Acanthothiris costata the original is 
in the collection of Jardin des Plantes (Musée d’histoire Naturelle), Paris. This specimen was 
figured by Thevenin (1910). 
Fics. 2 a-d, 3 a-d, 4 a-d. Acanthothiris cf. A. costata Orbigny. Upper Bajocian—Lower 
Callovian (Chanaz Beds). Pugieu (Ain), France. B.M. BB. 44163-65. 
Fics. 5 a-d. Acanthorhynchia (Acanthorhynchia) panacanathina (Buckman & 
Walker). Bajocian, zigzag zone. Burton Bradstock, Dorset, England. B.M. B. 63479. 
Fics. 6 a-d. A. (Acanthorhynchia) panacanathina (Buckman & Walker). “ Inferior 
Oolite’’. Larkfield Quarry, Burton Bradstock, Dorset, England. B.M. B. 31306. 
Fics. 7 a-d. A. (Acanthorhynchia) panacanthina (Buckman & Walker). Bajocian, 
parkinsoni zone. Wennet Hills, Burton Bradstock, Dorset, England. B.M. B. 31304. 
Fics. 8 a-d. Acanthorhynchia (Acanthorhynchia) spinulosa (Oppel). ‘‘ Oxfordien”’. 
Montsaon, Chaumont (Haute Marne), France. B.M. B. 36080. 
Fics. 9 a-d. A. (Acanthorhynchia) spinulosa (Oppel). ‘‘ Oxfordien’’. Bolognes 
(Haute Marne), France. B.M. B. 36079. 
Fics. 10 a-d. Acanthorhynchia (Acanthorhynchia) vilsensis sp. nov. Paratype. 
Callovian. Legam bei Vils, southern Germany. Collection of the Bayerische Staatsammlung 
fiir Palaontologie und historische Geologie, Miinich. AS xxiv 5. 
Fics. 11 a-d. A. (Acanthorhynchia) vilsensis sp. nov. Holotype. Details as fig. Io. 
AS xxiv 2. 
Fics. 12 a-d. A. (Acanthorhynchia) vilsensis sp. nov. Paratype. Details as fig. 10. 
AS xxiv 5. 
