59 



Thorax, with lo segrnents preserved, little longer than the cephalon. 

 Axial lobe about 2/3 of the whole breadth near the anterior border, gradually 

 becoming narrower toward the pygidium ; pleurae, convex with inner portion 

 straight, and the outer portion bent downward. Inner portion of the pleurae 

 almost half as long as the outer in the first segment, and nearl)' equal in the 

 last. 



Pygidium unknown. 

 Dimensions : — 



Cephalon 29 mm. broad, measured along the chord. 



15 mm. long in projection. 

 Glabella 1 1 mm. broad at the base measured along the chord. 

 Eyes 19 mm. apart, measured along the chord. 



4.5 mm. distant from the dorsal furrow in projection. 

 2 mm. distant from the posterior border of the cephalon, in 

 projection. 

 Thorax J 6 mm. long in projection. 



30 mm. broah measured along the chord. 

 Axial lobe of the first segment i i mm. broad, in projection. 

 Axial lobe of the last segment 8 mm. broad, in projection. 

 This species resembles /. rcvaliensis Holm, from the Vagiiioccras lime- 

 stone of the Baltic province ; the latter is characterised by having a semicir- 

 cular cephalon, of which the free cheeks are more prolonged to the genal angle 

 than in the present species. 



Locality ;— No-lu-ping, Tung-hu-hsien, prov. Hu-pei (Usui Coll.) 



Brachiopoda. 



(]^\- I. H/VVASAKA.) 



Strophomenidae. 



Triplecia, Hall. 

 Triplecia poloi M \k i i i.li sp. 

 ri. XXII., Figs. 1-5. 

 1901. ScJdzopIioria poloi, Martklli : — Fossili del Siluriano Inferiore 

 dello schensi (Cina). Boll, della Soc. Gcol. Ital., p. 302, pi. IV'., 

 figs. I 7-22. 



