SQTTATINIDJB. 
65 
Family SQUATINIDHE. 
Body depressed, flattened. Mouth anterior. Pectoral fins large, 
with the basal portion much produced forwards, but not connected 
with the head. Gill-openings wide, lateral, partly covered by the 
base of the pectoral. Spiracles wide, behind the eyes. Teeth 
conical and pointed. Dorsal fins, without spines, upon the tail. 
Skin more or less provided with small tubercles. 
Genus SQUATINA (Aldrovandi), Dumeril. 
[Zool. Analyt. 1806, p. 102.] 
Syn. Squatina , Aldrovandi, De Piscibus Libri, 1638, p. 471. 
Rhina , J. T. Klein, Hist. Pise. Nat. pt. iii. 1742, p. 13. 
J //c*jUjvu^Tliaumas, Minister, Beitr. Petrefakt. v. 1842, p. 62. 33f 
J 'S ' f **£■/?*• P Phorcynis, V. Thiolliere, Poiss. Foss. Bugey, 1854, p. 9. ~ /**/*' 34^ / 4 
/cA^stf-Scaldia, H. Le Hon, Prelim. Mem. Poiss. Tert. Belg. 1871, p. 7. 
/***' Trigonodus , T. C. Winkler, Archiv. Mus. Teyler, vol. iv. 1876, 
7 
11' the fossil Squatinidse hitherto discovered may be referred to 
this, the single surviving genus. The teeth are destitute of distinct 
lateral denticles, and are characterized by a small median downward 
extension of the crown upon the front of the root beneath the large 
cone. Three or four rows of the teeth are simultaneously in func¬ 
tion, and they are arranged in widely-separated transverse series. 
There is a median symphysial row in the upper jaw. 
Squatina alifera (Miinster). 
1842. Thaumas alifer , Miinster, Beitr. Petrefakt. v. p. 62, pi. vii. fig. 1. 
1843. Thaumasfimbdatus , Miinster, op. cit. vi. p. 53, pi. i. fig. 4. 
1847. Squatina alifer, C. Giebel, Fauna d. Yorw. vol. i. pt. iii. p. 298. 
1854. Squatina acanthoderma , 0. Fraas, Zeitschr, deutsch. geol. Ges. 
vol. vi. p. 782, pis. xxvii.-xxix. 
1857. Thaumas (Squatina) alifer , A. Wagner, Gelehr. Anz. bay. Akad. 
Wiss. vol. xliv. p. 292. 
1859. Squatina alifera, H. von Meyer, Palaeontogr. vol. vii. p. 3. 
1861, Squatina alifera and S. acanthoderma, A. Wagner, Abb. k. bay. 
Akad. Wiss. math.-phys. Cl. vol. ix. pp. 305, 306. 
1876. Squatina acanthoderma and S. alifer, C. Hasse, Morphol. Jahrb 
vol. ii. p. 466, pi. xxx. figs. 1, 2, 11, pi. xxxi. figs. 16-18. 
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