50 
Plesiosauridce. 
"Wall -case, 
No. 13. 
Wall-cases, 
Nos. 9, 10, 
13, 
Table-cases, 
Nos. 15, 16, 
17. 
robustus, the PI. laticeps, PI. macrocephalus , all in Case No. 13 ; 
and the cast of the Thaumatosaurus , fixed on the wall of 
the East Corridor (No. 3 on Plan), leading to the S.E. gallery, 
which is 22' 0" in length and 14' 0" in breadth, measuring 
across its expanded paddles. 
Fig. 68.— Skeleton of Lariosciurus Balsami (Curioni) ; Muselielkalk, Pcrledo, Logo 
di Como, Italy, ( £ nat. size ; original in the Munich Museum). 
Within the family Plesiosauri djs are included several allied 
genera, namely, Pliosaurus (with five species) ; Peloneustes (with 
two species) ; Thaumatosaurus (with seven species; ; Polypty- 
chodon (with two species) ; Cimohosaurus (with twenty-eight 
species); Eretrnosaurus (with two species) ; and the type-genus 
Plesiosaurus (with twelve species) ; in all, some fifty-eight 
