78 
SEIACHII. 
The name Euryarthra was proposed by Agassiz for the pec ora 
fin of a large Tariety of RMnobatus hityesiacus, in allusion to 
great distance betwoen the successiTe joints in the cartilagmou 
rays. , . 
Syrrhina ' is also unrecognizable in a fossil state, and mus 
included here. 
Rhinobatus bugesiacus (Thiollieue). 
(P) 1830. Aelhpos elongatus, G. von Miinster, Neues Jahrb, p- 681 
(incompletely defined). ... gg 2 
1843. Eunjarthra munsterii, L. Agassiz, Poiss. Foss. vol. m. P- 
(incompletely defined). . rg-i 
1849. Spathohatis bugesiacus, V. Thiollifire, Ann. Soc. Agric. yon L 
vol. i. p. 63. . j 
1864. Spathohatis bugesiacus, V. ThiolliSre, Poiss. Foss. Bugey, p • 
p. 7, pis. i., ii. • . Atod. 
1857. Spathohatis miralnlis, A. Wagner, Gelehrte Anzoig. ay. 
Wiss. vol. xliv. p. 292. Wiss- 
1801. Spathohatis mirahilis, A. Wagner, Abh. k. bay. A a 
math.-phys. Cl., vol. ix. p. 813. , 
1887. Spathohatis mirahilis, K. A. von Zittel, Ilandb. Palceon . 
p. 103, fig. 117 (woodcut). 
Type. Complete skeleton. , 
Snout produced and acute ; the two rostral ridges narrow, 
separated by a broad groove throughout their length. o 
mouth straight. Disk moderately broad ; length of pcctora 
nearly times its breadth at the point of insertion. Skin covere 
with fine shagreen, without large tubercles or spines. ^ _ 
As shown by Zittol’s figure, the so-called Spui^iobatis niira i 
is only a largo variety of this species. The Bavarian specimen i 
the Munich Museum is 1'7 m. in length. 
Form. Sf Loc. Lower Kimmeridgian (Lithogi'aphic Stone) : op • 
Ain, France ; Bavaria. 
P. 2099. Impression of a fossil, showing the complete fish, 
the extremity of the snout and right pectoral n , 
position of the dorsal fins well seen ; Cirin, Ain. 
Egerton Volt. 
P. 2099 a- Disk, destroyed in advance of the mouth, and including 
a portion of the caudal region posteriorly ; Cirin, 
Egerton Coll. 
1 Muller and Henle, Syst. Beschreib. Plagiostom. 1841, p. H3- 
