Canton Glarus, Switzerland; BMNH uncatalogued, 

 ca. 135 mm; BMNH P 4522, ca. 120 mm; BMNH P 

 1893, unmeasurable. 

 Protacanthodes ombonii (Zigno): IGUP 10.901-902, in 

 counterpart, 112 mm. Eocene of Monte Bolca, Italy, 

 holotype of Protobalistum ombonii. 



Balistidae 



Balistomorphus orbiculatus (Heer): NSKG 2688, single 

 plate, 65.6 mm, Oligocene of Canton Glarus, 

 Switzerland, holotype of Acanthoderma orbicula- 

 tum. 



Balistomorphus ovalis (Agassiz): both specimens from 

 the Oligocene of Canton Glarus, Switzerland; IGUN 

 228, single plate, 121 mm, holotype of Acanthoderma 

 ovale; NSKG 178b, single plate, 119 mm. 



Balistomorphus spinosus (Agassiz); both specimens 

 from the Oligocene of Canton Glarus, Switzerland; 

 BMNH P. 3973, single plate, ca. 90 mm, holotype of 

 Acanthoderma spinosum; NSKG 189 a-b, in counter- 

 part, too indistinct to measure. 



Aracanidae 



Proaracana dubia (de Blainville): all three specimens 

 from the Eocene of Monte Bolca, Italy; MNHN (IP) 

 10974-75, in counterpart, 54.5 mm, holotype oiBalistes 

 dubius; MCSNV T8 and T63, in counterpart, 31.4 

 mm; IGPUP uncatalogued, single plate, ca. 52 mm. 



Ostraciidae 



Eolactoria sorbinii Tyler: MCSNV T6-7, in counter- 

 part, 15.5 mm, Eocene of Monte Bolca, Italy, holo- 

 type. 



Triodontidae 



Triodon antiquus Leriche: BMNH P 12629, large frag- 

 ment of right premaxillary, Eocene of Barton, Hants., 

 England; BMNH P 15193, large fragment of right 

 premaxillary. Eocene of Barton, Hants., England; 

 BMNH P 15726, large fragment of fused dentaries, 

 Eocene of Schaerbeek, Belgium; BMNH P 46696, frag- 

 ment of middle of fused dentaries. Eocene of the 

 London Clay, England; BMNH P 28899, small frag- 

 ment of teeth from edge of jaw. Eocene of the London 

 Clay, England; BMNH P 25776-81, five fragments of 

 fused dentaries and one right premaxillary. Eocene of 

 Barton Hants., England. 



Tetraodontidae 



"Tetraodon" lecointrae Leriche: IGPUP Miocene of 

 Piromafo, Italy, no. 13, three fragments of the elongate 

 dental lamellae at edge of jaw. 



Eotetraodon pygmaeus Zigno: IGUP 6890-91, in counter- 

 part, 18.2 mm. Eocene of Monte Bolca, Italy. 



Diodon scillae Agassiz: IGPUP Miocene of Terra Ros- 

 sa, Italy, no. 1, one complete trituration plate with 

 right and left halves; IGPUP Miocene of Livello ad 

 Aturia, Italy, no. 3, one half of a trituration plate; 

 IGPUP Miocene of Terreno Agrario, Italy, no. 27, one 

 half of a trituration plate. 



Diodon tenuispinus Agassiz: seven specimens from the 

 Eocene of Monte Bolca, Italy; MNHN (IP) 10976-77, 

 in counterpart (dorsoventral), 19.7 mm, holotype; 

 MNHN (IP) 10978, single plate (dorsoventral), 12.6 

 mm; MNHN (IP) 10979, single plate (dorsoventral), 

 46.5 mm; MCSNV B. 18, single plate (dorsoventral), 

 31.5 mm; MCSNV B. 19, single plate (dorsoventral), 

 40.5 mm; BMNH P 11168, in counterpart (dorso- 

 ventral), 22.9 mm; BMNH P 12360, single plate 

 (dorsoventral), 13.5 mm. 



"Diodon" sp.: eight specimens from the Eocene of 

 Monte Bolca, Italy; MCSNV T 10, single plate (dorso- 

 ventral), 11.8 mm, Italy; MCSNV T 11, single plate 

 (dorsoventral), 35.1 mm; IGUP 12810-11, in counter- 

 part (dorsoventral), 27.3 mm; IGUP 6894, single plate 

 (dorsoventral), 17.4 mm; IGUP 6861, single plate 

 (dorsoventral), 11.8 mm; MCSNV MS 50-51, in 

 counterpart (dorsoventral), 68.9 mm; MCSNV T2, 

 single plate (dorsoventral), 18.4 mm; BMNH P 10735, 

 in counterpart (dorsoventral), 25.8 mm. 



Eodiodon erinaceus (Agassiz): five specimens from the 

 Eocene of Monte Bolca, Italy; BMNH P 3873, single 

 plate (dorsoventral), 77.5 mm, holotype of Diodon 

 erinaceus; BMNH P 10426, single plate (dorso- 

 ventral), 96.5 mm; IGUP 8855-56, in counterpart 

 (dorsoventral), 50.3 mm; IGUP 8853-54, in counterpart 

 (dorsoventral), 68.8 mm; IGUP 8670-71, in counterpart 

 (dorsoventral), ca. 64 mm. 



Kyrtogymnodon capellinii (de Stefano): IGPUP 

 Miocene of Livello ad Aturia, Italy, no. 4, right and left 

 halves of a trituration plate; IGPUP Miocene of Ter- 

 rene Agrario, Italy, no. 28, fragment of a large tritura- 

 tion plate. 



Oligodiodon acanthodes (Sauvage): IGPUP uncata- 

 logued, most of left premaxillary and top of maxillary, 

 Oligocene of Monti Livomesi, Italy. 



Oligodiodon platyodus (Portis): IGPUR uncatalogued, 

 one half of a trituration plate, 15.4 mm greatest length, 

 Oligocene of Montecchio Maggiore, Italy, type 

 specimen of Diodon platyodus. 



Progymnodon hilgendorfi Damea: BMNH P 11089, 

 large fragment of jaw with teeth and trituration plate. 

 Eocene of Fayum, Egypt. 



Progymnodon gigantodus (Portis): IGPUR uncata- 

 logued, right and left halves of a trituration plate, 41.8 

 mm greatest length of entire plate. Eocene of Castel 

 Madama, Italy, type specimen of Diodon gigantodus; 

 IGPUP Miocene of Terra Rossa, Italy, no. 1, two 

 separate halves of the same trituration plate; IGPUP 

 Miocene of Livello ad Aturia, Italy, no. 3, half of a 

 large trituration plate; IGPUP Miocene of Terreno 

 Agrario, Italy, no. 27, two halves of a trituration plate. 



