56 SAN niKdO SOCIETY OF NATTKAIj HISTORY 



L ORENZ (Th. )— Continued 



tiire. Trachyostracus has a tliick, rough shell; Ijosttacuis a smooth, finely porous shell. 

 These two genera exhibit a rare case of conve.gence. 



Examples of this species are the two following forms: Soh^noplntra Ho^vh•yi \^'alc. 

 and Ptychopar'ia limhata Matt. 



Under Liostracus Angelin, as emend, by Brogger, the author includes Liostracus 

 microplitlialmus Ang., fig. 4. Ptyclioptiria P'lucliensis W'alcott. An onto care planum 

 Dames. Llostrtinis Linnarssoni Brogger, L. aculealiis Ang. 



Macrotoxus n. gen.: The principal characteristics consist in the very long arch- 

 shaped eyes, the deep dorsal furrows and the thick, rough shell. The author refers 

 Anomocare An^elini Gronwall and Conoi'ephuWtcs prrseus Hall to the genus. 



Alokistocare new genus: This genus has in common with Macrotoxus the long, 

 arch-shaped eyes, and the long dorsal furrow around the glabella. By its porous shell 

 it is differentiated from the former. TJie author refers Ptychopdria su/xormil/i II. & 

 \V. to this genus. 



Megalophthalmus new genus: Also here are the long, arch-shaped eyes the prin- 

 cipal element. The glabella does not lie deeply in the head shield, but comes out high 

 over the cheeks. Even trace of ilorsal furrows is lacking. The shell is thick, rough, 

 not porous. 



The author refers Liostracus uicgalurus Dames and A nomocarc minus Dames to 

 this new genus, remarking that it is not improbable that this group is also distributed 

 in North America. In its external appearance it resembles throughout the old Swedish 

 species of Anomocare. The last, however, has a highly porous shell. 



Under the genus Anomocare the author includes Anomocare latdimhatiim Dames, 

 A. excavaium Ang., A. limha/um Ang. Liostracus Maydclli Schmidt, Atiomocare 

 con'inunc n. sp. and A. laevc Ang. 



The author places Couocephalina Brogger and (^onocephalites Barrande, imder two 

 groups, on the difference of the ornamentation of the test, using Ptychoparia Emmrichi 

 for the type of the first genus, with granulated shell; and Concephalites ornalus Brog- 

 ger for the second genus, although Briigger used this for his type. 



The author figures Ptychoparia Emmrichi Barr. also C.onoccpJiaUtcs ornatus Brogger 

 and C. succicus Wallerius. 



The author gives the following description of the new genus A m photon with the 

 species A. Steinnanni for its type: 



Glabella narrow, highly cylindrical, with deep furrows. On both sides of the high 

 glabella wing-shaped, similuna-shaped cushions, that resemble ears on a great ele- 

 phant head. The eyes are long, box-shaped and stand upright. The anterior eye 

 corners lie close to the glabella. The facial sutures follow the eye lobes, diverging 

 slightly from the anterior eye corners to the frontal margin. From the rear eye cor- 

 ners it branched outwardly into a horizontal piece before it cuts through the rear 

 margin; thereby forms a small band attached to the rear of the cheek. Close to the 

 front end of the glabella is a narrow, flat, bent-up edge. Tlie pygidium greatly re- 

 sembles that of Anomocare, for in a slab of fossils from Lai^va, are found numerous 

 head sliields of this species, corresponding to head and tail shields of Anomocare. 



( )n ]iage 91, the author describes Anomocare commune n. sp. (referred by W'alcott to 

 Anomocarella chinensis W'alcott) ; also Anomocare o-valum n. sp. and A. speciosum n. 

 sp. (referred by Walcott to the getius Anomocarella). 



The author includes a description of Olenus sp. Ptychoparia (Solenopleura) sp., and 

 the description of a new genus Schantimgia, with \. Buchruckeri for its type (this has 

 been referred by W'alcott to dhiian i^ia nitida). 



The other fossil Crustacea described in tiiis work aie: Schanluni;i Monkei n. sp. 

 Liostracus latus n. sp. Ai^nostus fallax Linrs. var. Lai-ivuensis n. var., ./. par-vifrons 



