SCOMBRID^. 
457 
Chiavon, Vicentin. [Imperfect fish; Piovene Coll., 
Lonedo.] 
The fragmentary fossils described under the following names do 
not appear to belong to this genus :— 
Tliynnus angustus, H. E. Sauvage, Ann. Sci. Nat. [5] vol. xiv. 
(1870), art. no. 7, p. 6, and Ann. Sci. Geol. vol. iv. (1873), 
art. no. 1, p. 144, fig. 21. Auccis (?), D. G. Kramberger, 
Beitr. Palaont. Oesterr.-Engarns, vol. ii. (1882), p. 118. 
—Upper Miocene ; Licata, Sicily. 
Tliynnus holcensis, L. Agassiz, Neues Jahrb. 1835, p. 305, and 
Poiss. Eoss. vol. V. pt. i. (1844), p. 57 (undescribed). 
Scomber tliynnus^ G. S. Yolta, Ittiolit. Veronese (1796), 
p. cxix. pi. xxvii. {errore). —Upper Eocene; Monte Bolca. 
[Imperfect fish ; Paris Museum of Natural History.] 
Tliynnus (?) proximus, H. E. Sauvage, loc. cit. 1870, p. 7, and 
1873, p. 146, fig. 24.—Upper Miocene ; Licata. [Portion 
of trunk.] 
Genus EOTHYNNUS, novum. 
Syn. Coelocephalus, L. Agassiz, Poiss. Foss. vol. v. pt. ii. 1844, p. 139 
(name only) 
A genus known only by the head, which is essentially identical 
with that of Tliynnus, but seems to be deeper in proportion to its 
width. Teeth on margin of jaws very small and clustered in more 
than one series. 
Eothynnus salmoneus, sp. nov. 
1844-45, Coelocephalus salmoneus, L. Agassiz, Poiss. Foss. vol. v. pt. ii. 
p. 139, and Rep. Brit. Assoc. 1844, p. 308 (name only). 
Type. Imperfect cranium ; British Museum. 
The type species, with head and opercular apparatus sometimes 
nearly 0*25 in length. Width of cranium at occiput about two 
thirds maximum depth of head. Maximum depth of operculum 
about twice its greatest width. 
Form. ^ Loc. Lower Eocene (London Clay): London Basin. 
P. 623. Very imperfect cranium, labelled byEgerton as intended to be 
the type specimen of this species; Sheppey. Egerton Coll. 
28757. Large head, with some anterior vertebrae much like those 
of Thynnus ; Sheppey. Purchased, 1853. 
^ This generic name has been employed for an existing Macrurid by Gilbert 
& Cramer, Proc. U.S. Nat. Mus. vol. xix. (1897), p. 422. 
