14 
ACTIXOPTERYGII. 
1865. Saurichthys tenuirostris, H. Eck, Form. bunt. Sindst. u. Muscbelk. 
Obersshlesien, p. 121. 
1873. Stylorhynchus tenuirostris, K. Martin, Zjitschr. deutsch. geol. 
Ges. vol. xxv. p. 725, pi. xxii. fig. 14. 
1838. Saurichthys tenuirostris, K. A. von Zittel, Handb. Pakeont. 
vol. iii. p. 266. 
1892. Saurichthys tenuirostris, 0. M. Reis, Geogu. Jahresb. 1891, 
p. 151, (?) fig. 4. 
Type. Cranium; Palaeontological Museum, Munich. 
The type species of the so-called Saurorhynchus (Munster MS.) 
and Stylorhynchus, of small size and with very slender snout, the 
head attaining a length of about 0*06 and its maximum breadth 
O'Ol. The external ornament of the cranial roof consists chiefly of 
tubercles. 
Form. 6f Lop. Muschelkalk : Germany. 
Rot represented in the Collection. 
Rrccch- 
riB^adtorhynclms acutus (Agassiz). 
[Plate II. fig. 1.] 
1844. Belonostomus acutus, L. Agassiz, Poiss. Foss. vol. ii. pt. ii. p. 142, 
pi. xlvii a. figs. 3, 4. 
1844. Belonostomus anningice, F. Agassiz, ibid. p. 143 (name onlv). 
]Head; British Museum.] 
1844. Belonostomus tenellus, L. Agassiz, ibid. p. 143 (name only). 
[Mandibular symphysis ; British Museum.] 
1858. Belonorhynchus (?) acutus and B. (?) anningice, H. G. Broun, 
Neues Jalirb. p. 12. 
1876. Belonostomus acutus, J. F. Blake, in Tate and Blake, Yorkshire 
Lias, p. 259. 
1887. Belonorhynchus acutus, K. A. von Zittel, Handb. Palaeont. 
vol. iii. p. 222. 
1888. Belonorhynchus anningice, A. S. Woodward, Ann. Mag. Nat. 
Hist. [6] vol. i. p. 355, and Quart. Jonrn. Geol. 8cc. vol. xliv. 
p. 147, pi. vii. fig. 14. 
1890. Belonorhynchus acutus, Woodward and Sherborn, Catal. Brit. 
Foss. Yertebrata, p. 16. 
1892. Saurorhynchus acutus, 0. M. Reis, Geogn. Jahresb. 1891, p. 145 
(in part). 
Type. Imperfect cranium; British Museum. 
The type species of the so-called Saurorhynchus, of moderate 
size, the head attaining a length of about 0*15. Head from four 
and a half to five times as long as its maximum depth : distance 
between the orbit and the occiput considerably exceeding the maxi¬ 
mum depth of the mandible, and the angular bone of the latter 
much truncated though gently rounded postero-interiorly ; dentition 
