28 



rotundatis; abdomine semicirculari, late — limbato costis sim- 

 plicibus. 



Asaphus Corndensis Murch. 1. c. XI. 



E schistis format. transitor. inferioribus (Llandeilo 



flags): Middleton. 

 Sequenti speciei proxima, a qua diflfert capitis acu- 

 minibus longioribus et pleuris apice rotundatis: 



4. A. Buchii Brongn, 



A. corpore late-ovato, capite semilunari, angulis po- 

 sticis acuminatis, acumine ad 4um, 5um articulum extenso, 

 fronte marginem planiusculum attingente, clavata, obso- 

 lete lobata; oculis rotundatis; thoracis rhachide pleuris 

 vix dimidio latiore, pleuris acuminatis; abdoiuinis semicir- 

 cularis costis sulcatis, subbifidis. 



Asaphus Debuchii Brngn. pg. 20. II. 2. A — C; 



In stratis Silurianae formationis infimis (Llandeilo 

 Flags) species vulgaris (Pembrockeshire, Caermarthenshire 

 Radnockshire, Brecknockshire, Shropshire etc.) 



5. A, dilatatus Briinn. 



C. Capite lemilunari, angulis posticis acuminatis, 

 protub. frontali antice parum dilatata, longe a margine 

 antico finita, 4 impressionibus lateralibus lobata, oculis 

 rotundalis; abdominis costis subsimplicibus. 



Trilobites dilatatus Briinnich, Kiobenh. Selks. Skri- 

 fter Nye Saml. I. 393 (excl. synonymis sec. 

 Dalm.) 

 In schisto argillaceo Norvegiae, ad Fossum et Mo- 

 dum. 



Haec species antecedenti maxime cognata est, dif- 

 fert autem notis pluribus. Caput ambitu semielliptico, 

 duplo longius qnam latum, parum convexum. Anguli 



