112 
BESMEPOKID^. 
Foreign : 
Senonian : Gehrden ; near Le Mans (?). 
Campanian: Riigen. T^oueoi BeUmnitella mucronata\ Qvarnby, 
Stafversvad, and Hemraingslycke ; beds with Actinocamnx 
mamillatus : Balsberg, V. Olinge, Karlshamni, (>. Karup, 
etc., Sweden. 
Coniacian : Tours. 
Tiguees. 
Fig. 29. A thin medial section along a branch, showing the 
bases of the lateral processes and the cancellate structure of the 
main mass of the stem ; X 12^ dia. Middle Chalk — zone of 
Micr aster coriestudinarium : Chatham. Gamble Coll. D. 503. 
Fig. 29 . — Besmepora semicylindrica ; x 12 * 5 . D. 503. 
Affinities. 
This species, the type of the genus, is common and well 
characterized. Its abundance in the Chalk of Riigen has led some 
collectors to regard it as von Hagenow’s Retepora striata^ which 
appears, however, to he clearly a Somoeosolen {vide antea, p. 97), 
though the original figure is small and somewhat crude. As 
von Hagenow recorded B. semicylindrica from Riigen as well as his 
R. striata, the two species are probably quite distinct. 
LIST OF SPECIMENS. 
British. 
D. 2946. Lonsdale’s type-specimen. Chalk. Dover. Dixon Coll. Figd. 
Dixon, Geol. Sussex, pi. xviiiA, fig. 6. 
B. 4477. Paratype. Part of a branch showing an oblique transverse section. 
Chalk. Dover. Dixon Coll. Figd. ibid. pi. xviiiA, fig. Qd. 
