252 
PROCEEDINGS COTTESWOLD CLUB 
1920 
longitudinal ridges. At about the centre of the specimen the 
impression of the ink-bag with its duct is displayed ; the 
posterior boundary of the ink-bag is 171 mm. from the anterior 
boundary of the gladius, the length of the ink-bag with its 
duct being about 83 mm. The ink-bag is comparatively 
small, oval in outline, about 21 mm. long and 14 mm. wide ; 
whilst the duct is about 2.5 mm. in diameter. Around the 
end of the duct and extending for some 40 mm. in front of it the 
surface is stained with the ink. On the left side of the anterior 
end of the pen traces of the mantle are preserved displaying 
the usual rather coarse transverse striae. 
The specimen is evidently referable to Munster’s genus 
Geoteuthis and comes nearest to the species which in 1849 
Quenstedt named coriaceus. 1 To this species Quenstedt 2 
also referred, after an examination of the original, the fossil 
which Deslongchamps 3 had previously described from the 
Upper Lias of Curcy in Normandy as Teudopsis agassizii, 
a species considered by d’Orbigny 4 at one time to be the 
pro-ostracum of a Belemnite, and subsequently 5 referred by 
him to the genus Belopeltis of Voltz. A. Wagner 6 regarded 
Quenstedt’s coriaceus as identical with Munster’s hastata, 
but beyond remarking that, according to the dimensions 
given by d’Orbigny, Deslongchamps’ agassizii came nearer to 
Munster’s Geoteuthis sagittata than to his G. hastata, he ventured 
no definite opinion as to the affinities of Deslongchamps’ species. 
The English example, then, seems to be referable to Geoteuthis 
coriaceus, Quenstedt sp., a species in Quenstedt’s own opinion 
identical with Deslongchamps’ Agassizii, so that the name 
Geoteuthis agassizii Deslongchamps sp. is adopted for the 
specimen. 
Deslongchamps’ type-specimen came from the Upper Lias 
of Curcy, Normandy, whilst under the name of Idiginites 
coriaceus Quenstedt figured the species in 1849 from the Upper 
Lias (Lias e) of Wurttemberg. From the Upper Lias (Toarcian) 
1 Die Cephalopoden (1849), p. 512, pi. xxxiv., figs, 5-8. 
2 Der Jura , 1858, p. 245. 
3 Mem. Soc. Linn. Normandie, tom. v. (1835), p. 72, pi. ii., fig. 15. 
4 Pal. Franq ., Terr. Jurass., tom. i. (1842), p. 38. 
5 Prod, de Paleont ., tom. i. (1849) [ i.e . 1850], p. 243. 
6 Abh. k. Bayer. Akad. Wissensch., Munich, Bd. viii., Abth. 3 (i860', pp. 809 and 816. 
