BIBLIOGRAPHY QF PALAOZOIG CRUSTACEA 11 
BEECHER (Charles E.)—Continued 
Bumastus Murch. Dysplanus Burmeister, Ectillaenus Salter, Holocephlina Salter, 
Hydralenus Salter, Illaenopsis Salter, Illaenurus Hall, Nileus Dalm., Octillaenus Salter, 
Panderia Volboth, Psilocephalus Salter, Symphysurus Goldfuss, and Thaleops Conrad. 
Family 7, Proetidae Barrande. 
Genera Proetus Steininger, Arethusina Barr., Brachymetopus McCoy, Celmus Ang., 
Cordania Clarke, Crotalurus Volb., Cyphaspis Burm., Dechenella Kayser, Grifhthides 
Portl., Phaetonella Novak, Phillipsia Port., Prionopeltis Corda, Pseudophillipsia Gem- 
mellaro, Schmidtella Ischernyschew, Tropidocoryphe Novak, and Xiphogomium Corda. 
Family 8, Bronteidae Barrande. 
Family 9, Lichadidae Birrande. 
Genus Bronteus Goldfuss (Goldius DeKoninck). 
Genera Lichas Dalm., Arctinurus Castelnau, Arges Golf., Ceratolichas Hall and 
Clarke, Conolichas Dames, Dicranogmus Corda, Homolichas Schmidt, Hoplolichas 
Dames, Leiolichas Schmidt, Metopias Eichwald, Oncholichas Schmidt, Platymetopus 
Ang., Terataspis Hall, Trochurus Beyrich and Uralichas Delgado. 
Family 10, Acidaspidae Barrande. 
Genera Acidaspis Murch., Ancyropyge Clarke, Ceratocephala Warder, Dicranurus 
Conrad, Odontopleura Emmrich and Selenopeltis Corda. 
Order C, Proparia. 
Free cheeks not bearing the genal angles; facial sutures extending from the lateral 
margins of the cephalon in front of the genal angles, inward and forward, cutting the 
anterior margin separately or uniting in front of the glabella. 
Compound paired eyes, scarcely developed or sometimes absent in the most primitive 
family; well-developed and schizochroal in last family. 
Family 11, Encrinuridae Linnarsson. 
Genera Encrinurus Emmrich, Areia Barr., Cybele Loven, Dindymene Corda, Placo- 
paria Corda and Prosopiscus Salter. 
Family 12, Calymmenidae Brongniart. 
Group 1, Calymmene Brong., and Calymenella Bergeron and Calymenopsis Munier- 
Chalmas and Bergeron. 
Second Group, Homalonotus Koenig, Brongniartia Salter, Burmiesteria Salter, Trim- 
erus Green, Ptychometopus Schmidt; Pharostoma. 
Calymenopsis and Calymenella are closely related to Calymmene. 
Family 13, Cheiruridae Salter. 
Genera Cheirurus Beyrich, Actinopeltis Corda, Amphion Pander, Anacheirurus Reed, 
Ceraurus Green, Crotalocephalus Salter, Cyrtometopus Ang., Deiphon Barr., Diaphano- 
metopus Schmidt, Eccoptocheile Corda, Hemispherocoryphe Reed, Nieszkowskia 
Schmidt, Onycopyge Woodward, Pseudosphaerexochus Schmidt, Sphaerexochus Beyrich, 
Sphaerocoryphe Ang., Staurocephalus Barr., and Youngia Lindstrém. 
Family 14, Phacopidae Salter. 
Genera Phacops Emmrich, Acaste Goldf., Chasmops McCoy, Coronura Hall, 
Corycephalus Hall and Clarke, Cryphaeus Green (preoccupied for a genus of Coleop- 
tera, 1833), Dalmanites Emm., Homalops Remele and Dames, Monorachos Schmidt, 
Odontocephalus Conrad, Pterygometopus Schmidt, Symphoria Clarke, and Trimero- 
cephalus McCoy. . 
Note—Other subdivisions and classification of the Lichidae have been made by 
Giirich, and also by Reed. 
The other families have been reclassified by Reed, Walcott and Raymond. Walcott 
remarks, in regard to Damesella, that the facial suture cuts the postero-lateral margin 
outside of the genal angle, so as to leave the genal angle on the fixed cheeks; the spine 
pee bonding to the genal spine in other genera of the order Proparia is on the free 
cheeks. 
