CONODONTS IN ARENIG-LLAN'DKII-0 FORMATION'S. 247 



NEW GENUS, SUBPRIONIODUS, Smith. 

 This genus differs from Prioniodus, Pander, in that the spike 

 at the end of the beam is sharp-pointed above the beam, but 

 not below it. 



Suhprioniodus jjaiiridentahis, new species. 



The spike is longer and stronger than the beam, and extends 

 only a short distance below it ; the beam carries but one small 

 tooth, distant from the spike; PI. VI., Fig. 21. 



Locality. — Hunt Law Clench, near Wanlockhead ; in chert-shale. 



Suhprioniodus furcatiLs, new species. 



This spike has a double curve, and extends slightly below the 

 beam in its middle part. The beam is curved up into a long 

 point, and carries two small teeth; PI. VL, Fig. 22. 



Locality. — Glencaple, Abington; in chert. 



Suhprioniodus acutus, new species. 



From a slightly curved beam project sixteen slender, sharply 

 pointed teeth of different sizes, getting gradually smaller towards 

 the slender end of the beam. The spike is more than half the 

 length of the beam; PI. VL, Fig. 24. 



Locality. — Head of Glenkip, in Leadhills, in chert-shale. 



Suhprioniodus parvus, new specie-s. 



The spike is more or less stout, and extends but a little below 

 the beam. The beam is sharp-pointed, and carries three teeth; 

 PI. VIL, Figs, 26, 28. 



Locality. — Hunt Law Cleuch, near Wanlockhead ; in chert-.shale. 



Suhprioniodus gibbosus, new species. 



The projection of the spike under the beam is considerably 

 widened. . The beam carries nine slightly curved and three 

 straight, longer teeth; PI. VIL, Fig. 27. 



Locality. — Hunt Law Cleuch, near Wanlockhead ; in chertrshale. 



Suhprioniodus lanceolatus, new species. 



This spike is carried slightly below the beam, and is slender 

 and sharp. The beam carries three teeth placed at an oblique 

 angle to it, and is extended at a slight angle into a long, lance- 

 shaped point, with a sharp side; PI. VIL, Fig. 29. 



Locality. — Criugcramp, near Crawford; in chert-shale. 



