])r. A. S. Woodward on Myriolcpis liil)Oinicn. 417 



of tlie fra;j:nioiitarj example? described by Dr. Traqimir and 

 Mr. IJoltoii *, that it seems worthy of special descri[)tioii. 



'J'he new specimen is shown of the natural size in PI. X., 

 and indicates a fish originally about 18 cm. in length. It is 

 therefore smaller tlian the examples previously discovered. 

 It is exposed in direct side view, and is only distorted by the 

 cnishiiig of the head a little downwards ami backwards upon 

 the anterior part of the abdominal re2;ion. 



An impression of part of the cranial roof proves that this 

 must have been coarsely but closely tuberculated. A frag- 

 ment of the dentary bone is ornamented with tine longitudinal 

 ridges, and its oral border bears a few very large conical 

 teeth which are suggestive of those of jSematopty chins and 

 Fi/go/)terus. Some indeterminable remains of coarsely tuber- 

 culated bones are also shown beneath the mandiblt\ 



The axial skeleton of the trunk is well calcified atid seen 

 through the thin squamation. There is a vacant space as 

 usual denoting the position of the notochord, while there are 

 no traces of ribs. The long neural spines of the abdominal 

 region in advance of the dorsal tin are clearly sei)arate from 

 their supporting arches. The neural and hse.nal arches in 

 the caudal region are comparatively small and fused with their 

 respective spines. 



Among- tiie crushed bones at the back of the head the 

 veitically elongated supraclavicle, with rounded lower end, 

 can be distinguished ; and its outer face, which is traversed 

 by the usual slime-canal^ is ornamented with fine concentric 

 ridgefe. The large elongate-triangular infraclavicles are 

 similarly ornamented. Tlie pectoral fin of one side is appa- 

 rently complete and has a rounded shape, with the gently 

 curved anterior border fringed by close-set minute fulcra. 

 All its rays are stout and closely articulated to a point near 

 the base^ while all except the lew foremost are finely divided 

 distally. When adpressed to the trunk this fin reaches the 

 origin of the pelvic pair, which arises slightly nearer to the 

 origin of the pectorals than to that of the anal fin. The 

 pelvic fins are almost as much elevated as the pectorals and 

 have a similarly arched anterior border, but no fulcra can be 

 seen here. The rays gradually increase in length to the 

 longest, and some of them exhibit a fine longitudinal striation 

 (fig. 1^). The hinder rays are incomplete, and above their 

 insertion, where some scales are displaced, there are a few 

 markings which seem to be due to rod-shaped baseosts. Of 



* 11. Bolton, " Xote ou Mijriolepishibemica, Traq.," Traos. INIauchester 

 Geol. Soc. vol. xxii. (1894) pp. 1-4, pis. i., ii. 



