BIBLIOGRAPHY OF PAL.EOZOIC CRUSTACEA. 61 



V. Asaphiis Broug. Glabella well defined, clavate iiutil it disappears; 

 the articulation of the tail is likewise distinct or indistinct until it disap- 

 pears completely. Thorax S-joiuted. 



VI. Illaenus Dalm. emend. Without glabella and without articulation 

 of the tail. Thorax (9) 10-jointed. Joints smooth. Eyes distant from 

 the axis of the head, located nearer to the margin. /. cassicauda, centrotu^ 

 and Buma>ttu>< harriensis. 



VII. B. Ogygia Brong. emend. Body 7 'i 8-jointed. 0. gueUardi, 

 drsmarestii, buchii, dilatata Brun. Asaphux tyrnnnuH does not belong 

 here, but to Asaphiis. 



VIII. Brontes Goldf. Caudal shield clypeoid, with radiating ribs. 

 Thorax 10-jointed. B . flahelUfer Goldf. 



IX. Nuttainia Eaton. Ribs of the tail distinct, connected only by their 

 margins, terminating in triangular points. Thorax 10-jointed. N. hibcr- 

 iiird Port. 



Family III. Calymene. 



X. Eucrinurus n. g. Possessing the power of contraction. Eyes 

 smooth. Glabella clavate. Pygidium with a maiiy-jointed axis and few 

 ribs. Entomostracites punctatua Wahl. Ampklon multwegmentntus and 

 Ofjygia rngosa Port. 



XI. Amphion Pander. Eyes smooth. Glabella of equal width, loljed. 

 Thorax many-jointed (20-jointed). Pygidium small and distinctly articu- 

 lated. A. frontilohuft Pand. 



XII. Calymene Brong. emend. With ocuU hiantes. Glabella narrow- 

 ing anteriorly, lobed. Thorax 13- jointed. Pygidium artifculated. Ribs 

 mostly furcated. ('. hlumembachii Brong. 



XIII. Homalonotus Konig (Trimerus Green). The same as XII, but 

 the glabella is not lobed. H.kn'tghtii Konig. Herschdli Murch., dc/phin- 

 orcphalus Green. 



B. Paradoxides. Not contractile. 



XIV. Conocephalus Zenk. Thorax 1-4-jointed. Eyes smooth. ? In 

 other respects like XI. C aulzeri Schloth, .■itriatus Emnj. 



XV. ElliiJsocephalus. E. koffi Schloth. 



XVI. Anthes Goldf. A. .scrabamides Wahl. 



XVII. Paradoxides Bron. emend. (Olenus Goldf. ) P. gibboms. 



Family IV. Odontiileura. Facial suture terminating at the posterior mar- 

 gin more or less distant from the angles of the head. Eyes smooth. Glabella 

 narrow anteriorly, divided into lobes at the sides. Margin of the head 

 (lentated. Thorax S-9-jointed, and upwards. Pygidium considerably 

 smaller than the head, with longer or shorter spiny appendages. The 

 pleurae of the thorax are likewise frequently elongated into spines. 

 Odontopleura n. g. Glabella semi-circular. Facial suture, see above. 

 Eyes smooth. Thorax 9-jointed. Pygidium furnished with a 2-jointed 

 axis, and dentated or spiny margin. O. bii<phiosa Emm., O.ovata Emm., 

 '>. mutica Emm., O. crcmatd Emm., O. cejitrlna Dalm., (>. de.tdata Goldf. 



