338 



BRACHIOPODA. 



[bil— cam. 



nate some distance from their origin ; 

 two brachial elevations under the ad- 

 ductor move toward the center of the 

 valve. Type A. wangenheimi. 



guadalupensis, Shumard, 1858, Trans. St. 

 Louis Acad. Sci., vol. 1, p. 292, Per- 

 mian Gr. 



spondyliformis, White & St. John, 1868, 

 Trans. Chi. Acad. Sci., p. 118, Up. Coal. 

 Meas. 

 Billingsia, Ford, 1885. The name being 



preoccupied, see Elkania. 

 Brackymerus, Shaler: The name was pre- 

 occupied for a genus of Coleoptera. 

 See Anastrophia. 

 Brachypnon, Shaler, syn. for Strophomena. 



geniculatum, see Strophomena geniculata. 



leda, see Strophomena leda. 



ventricosum, see Strophomena ventricosa. 

 Camarella, Billings, August, 1858, Can. 

 Nat. and Geol., vol. 4, p. 301. [Ety. 

 kamara, arching chamber ; ellus, dimin- 

 utive.] Shell ovate or subcircular, beaks 

 small, hinge-line short; mesial fold and 

 sinus becoming obsolete in the middle 

 part of the shell, below which the ra- 

 diating strhe are more or less numerous, 

 while above concentric strise occur. 

 Type C. volborthi. 



Fio. 54^.— Camarella hemipllcata. Dorsal, ven- 

 tral, and Bide views. 



ambigua, Hall, 1847, (Atrypa ambigua,) 



Pal. N. Y., vol. 1, {>. 14:;, Trenton 

 antiquata, Billings, 1861, Pal. Fobs., vol. 1, 



p. 10, Georgia Gr. 

 bisulcata, Emmons, 1842, (Orthis bisul- 



cata.) Geo. Rep. N. Y., p. 896. and Pal. 



N. Y., vol. 1, p. 139, Trenton Gr. 

 breviplicata, Billings, 1865, Pal. Foss., vol. 



1, p. 304, Quebec < 

 calcifera, Billings, 1861, Can. Nat. and G e o., 



vol.6, p. 318, Calcif. Or. 

 circulus, Hall, 1847, (Atrypa circulus,) 



Pal. N. Y., vol. 1, ]>. 142, Trenton Gr. 

 congesta, see Triplesia congesta. 

 costata, Billings, 1865, Pal. Foss., vol. 



1, p. 305, Quebec Gr. 

 cuspidata, see Triplesia cuspidata. 

 extam, see Triplesia extans. 

 hemiplicata, Hall, 1847, Atrypa hemi- 



plicata,) Pal. N. Y., vol. 1., p. 144, 



Trenton Gr. 

 lenticularis, Billings, 1866, Catal. Sil. 



Foss. Antic, p. 45, Anticosti Gr. 

 longirostra, Billings, 1858, Can. Nat. and 



Geo., vol. 4, p. 302, Chazy Gr. 

 nueUw, see Triplesia nucleus, 

 ops, Billings, 1862, Pal. Foss., vol. 1, p. 



148, Mid. Sil. 

 ortoiri, see Triplesia ortoni. 

 panderi, Billings, 1858, Can. Nat. and Geo., 



vol. 4, p. 301, Black Riv. Gr. 



parva, Billings, 1865, Pal. Foss., vol. 1, p. 



219, Quebec Gr. 

 polita, Billings, 1865, Pal. Foss., vol. 1, p. 



305, Quebec Gr. 

 primordialis, see Triplesia . primordialis. 

 rexena, see Anastrophia reversa. 

 varians.Billings, 



1859, Can. Nat. 



and Geo., vol. 



4, p. 4 4 5, 



Chazv Gr. „ 



,T rt iKrt^'K; n;n F' Q - 646. — Camarella vol- 



volborthi, Bill- bortnl . Dorsal, ventral, 

 l n g s, 1859, and side views. 

 Can. Nat and 

 Geo., vol. 4, p. 301, Black Kiv. Gr. 



waldronensis, see Triplesia waldronenrie. 

 Camarium, Hall, 1859, Pal. N. Y., vol. 3, p. 

 486, syn. for Merista. 



elongalum, see Merista elongata. 



typum, see Merista typus. 

 Camahoi'mokia, King, 1844 Ann. and Mag. 

 Nat. Hist., vol. 14, p. 313. [Ety. tomato, 

 an arched chamber; pJioreo, I cany.] 

 Subtrigonal, convex longitudinally; 

 mesial fold aud sinus, beak acute, 

 more or less incurved, small fissure be- 

 neath ; no area or deltidium; plicated, 

 impunctate, articulating by teeth and 

 sockets; dental plates in the ventral 

 valve, conjoined at their dorsal mar- 

 gina, forming a trough-shaped process 

 affixed to a low, medio-longitudinal 

 plate; the space between the sockets 

 in the dorsal valve is occupied by a 

 small, cardinal, muscular protuberance, 

 on either ride of which two slender 

 processes curve upward; from beneath 

 the cardinal process a vertical mesial 

 septum, a third or more of the length 

 of the valve, supporting along its upper 

 edge a spatula-shaped process, dilated 

 toward its free extremity, and projected 

 with a curve to near the center of the 

 shell. Type C. schlotheimi. 



bisulcata, Shumard, 1858, Trans. St. Louis 

 Acad. Sci., vol. 1, p. 296, Permian Gr. 



eucharis, Hall, 1867. Pal. N. Y., vol. 4, p. 

 368, Corniferous Gr. 



Fig. 547.— Camarophoria giflfbrdi. a, Dorsal view; b, 

 ventral valve; c, profile view. 



giffordi, Worthen, 1882, Bull. No. 1, 111. 

 St. Mus. Nat. Hist., p. 39, and Geo. Sur. 

 111., vol. 7, p. 318, Middle Coal Meas. 



globulina, Phillips, 1844, as identified by 

 Geinitz, is Rhynchonella uta. 



occidentalis, S. A. Miller, 1881, Jour. Cin. 

 Soc. Nat. Hist., vol. 4, p, 313, Burling- 

 ton Gr. 



