SUßCLASS II 



EUCRUSTACEA— PHYLLOCARIDA 



751 



Cardiolites Nich. Supposed tracks of Geratiocaris (?). Silurian ; Scotland. 



Garyocaris Salter. Carapace smooth, narrow, sub-acute in front, thick. Abdomen 

 unknown ; caudal plate with three spines. Cambrian ; Wales. 



Physocaris Salter. Carapace bladder-sliaped, pointed in front, bivalved (?), smooth. 

 Abdomen smooth ; telson longer than the cercopods. Silurian. 



Lingulocaris, Saccocaris Salter. Very imperfect remains of Crustacean bodies. 

 Lingula Flags ; Wales. 



Acanthocaris Peacli. Carapace small, with a blunt snoiit in front ; surface smooth. 

 Body Segments numerous, seven exposed beyond the carapace. Telson long ; cercopods 

 short or rudimentarj. Lower Carboniferous ; Scotland. 



Xiphidiocaris Jones and Woodw. (emend.). Known only by its long curved blade- 

 like telson. Silurian (Ludlow) ; England. (X. ensis Salter.) 



Gryptozoe Packard. Carapace smooth, broadly rounded in front ; imperfectly 

 known. Coal Measures ; Illinois, (C. problematicus Packard). Probably congeneric 

 with the Carboniferous species named Geratiocaris oretonensis and G. truncata Woodw., 

 in which traces of four cephalic appendages liave been found. 



Golpocaris Meek. Carapace smooth, with deep anterior marginal sinus and sharp 

 extremity. Caudal plate with three spines. Lower Carboniferous ; Kentucky. 



Strigocaris Vogdes (Solenocaris Meek). Carapace narrow and elongate, with 

 longitudinally striated surface ; very imperfectly known. 

 Lower Carboniferous ; Kentucky. 



Nothozoe Barrande. Doubtfully assigned here. Ordovi- 

 cian ; Bohemia. 



Phasganocaris Novak. Known only from the abdomen 

 and telson. Last segment long, cylindrical, with strong 

 articulation. Telson articulated to the cercopods by deep 

 sockets ; edges spinöse. Surface scaly. Lower Devonian ; 

 Bohemia. 



Macrocaris Miller. Carapace valves very narrow in 

 front, broad behind, strongly lineate. Body segments 

 numerous. Lower Carboniferous ; Kentucky. 



Family 2. Echinocaridae Clarke. 



Garapace elongate or oval, with nodes (muscular or seg- 

 mental) in the cephalic region, one of ivhich in each valve 

 may he ocular hut hears no optic pit ; one or more lateral 



carinae usually present. 



A free rostrum has been 



ohserved in some genera. 



Echinocaris Whitf. 

 (Figs. 1451, 1455). Hinge 

 short, carapace sub-oval, Fig. 1455. 



broad in front, not in- EcUnocaHs punctata (Hall), 

 curved behind nonn^tprn Hamilton Group ; Pratt's Falls, 

 curveu uenma, no postero- ^^^^ york. % (after Beecher). 



lateral spinules ; a single 



sigmoid carina on each valve, sometimes a small 

 accessory ridge near the hinge. Surface punctate 

 and pustulose, no longitudinal striations. Of the 

 body Segments, six are exposed and bear small 

 spines on their surface and posterior margins. 

 Pephricarishorriinlata ci&rk^. Cheiiiung Telson and cercopods are spines of unequal size. 



Group; Alfred, New York Vi (after ■.-r-jji i tt ^ • -..-r , . ^ . 



Clarke). Middle and Upper Devonian ; North America. 



Fig. 1456. 



