SOI,.— SPH.] 



CRUSTACEA. 



567 



Fig. 1058.— Solenocaris strigata 

 Cast of interior of left valve. 



glacialis, Billings, 1865, Pal. Foss., vol. 1, 

 p. 283, Up. Taconic. 



granulosa, Billings, 1862, Pal. Foss., vol. 1, 

 p. 92, Quebec Gr. or Up. Taconic. 

 Solenocaris, Meek, 1872, Proc. Acad. Nat. 

 Sci. Phil., p. 355. [Ety. solen, a genus 

 of shells; karis, shrimp.] Posterior 

 end subtruncated backward from below, 

 but not sinuous, as in Colpocaris ; ocu- 

 lar tubercle obsolete, and no indica- 

 tions of having its valves anchylosed 

 along the dorsal margin. Type S. stri- 

 gata. This name was preoccupied for 

 another crustacean by Young, in 1868, 

 in Proc. Nat. Hist. Glasgow, vol. 1, 

 p. 171. 



stludo vici, 

 W o rthen, 

 1884, Bull. 

 No. 2, 111. 

 St. M u s . 

 Nat. Hist., 

 p. 3, and 

 Geo. Sur. 

 111., vol. 8, p. 153, St. Louis Gr. 



strigata, Meek, 1872, Proc. Acad. Nat. Sci. 

 Phil, p. 335, and Ohio Pal., vol. 2, p. 

 321, Waverly Gr. 

 Solenopleura, Angelin, 1852, Palaeonto- 

 logia Suecica, p. 26. [Ety. selene, moon ; 

 pleuron, side.] Body ovate, test granu- 

 lated or tuberculous ; head wide, semi- 

 circular; glabella prominent, furrows 

 distinct, dorsal furrows deep and con- 

 tinuous; fixed cheeks, elevated in the 

 middle, front limb convex ; occipital 

 ring bearing a tubercle; genal angle 

 pointed ; thoracic segments fourteen ; 

 ends of pleurae bluntly rounded ; pygid- 

 ium medium size, few segments. Type 

 S. canaliculata. 



acadica, Whiteaves, 1887, Trans. Roy. Soc. 

 Can., p. 157, St. John Gr. 



acadica var. elongata, Matthew, 1887, 

 Trans. Roy. Soc. Can., p. 159, St. 

 John Gr. 



communis, Billings, 1874, Pal. Foss., vol. 

 2, p. 72, Up. Taconic. 



formosa, Hartt, 1868, (Conocephalit.es 

 formosus,) Acad. Geol., p. 654, St. 

 John Gr. 



halli, Hartt, 1868, (Conocephalites halli,) 

 Acad. Geol., p. 654, St. John Gr. 



nana, Ford, 1878, Am. 

 Jour. Sci. and Arts, 

 3d ser., vol. 15, p. 

 126, Up. Taconic. 



orestes, Hartt, 1868, 

 (C o n o c e p halites 

 orestes,) Acad. 

 Geol., p. 649, St. 

 John Gr. 



robbi, Hartt, 1868, 



( C o n o c e phalites Fig. 1059.— Solenopleu- 

 robbi,) Acad. Geol., ra nana. Magnified, 

 p. 648, St. John Gr. 



thyrsites, Hartt, 1868, (Conocephalites 

 thyrsites,) Acad. Geol., p. 653, St. 

 John Gr. 



tumida, Walcott, 1887, Am. Jour. Sci. and 

 Arts, 3d ser., vol. 34, p. 196, Up. Taconic. 

 Spathiocaris, Clarke, 1882, Am. Jour. Sci. 

 and Arts, 3d ser., vol. 23, p. 477. [Ety. 

 spathe, spathe; karis, shrimp.] Cara- 

 pace in one piece, oblong elliptical, 

 •convex, apical point near the focus of 

 the ellipse, from which point a cleft 

 extends backward, widening to the mar- 

 gin. Type S. emersoni. 

 emersoni, Clarke, 1882, Am. Jour. Sci. 

 and Arts, 3d. ser., vol. 23, p. 478, Port- 

 age Gr. 

 lutheri, Clarke, 1882, (Lisgocaris lutheri,) 

 Am. Jour. Sci. and Arts, 3d ser., vol. 

 23, p. 478, Ham. Gr. 

 Sph^rexochus, Beyricb, 1845, Euber einige 

 Bohm. Tril., p. 21. [Ety. sphaira, ball ; 

 exochos, prominent.] Cephalic shield 

 very convex, almost globular; cheeks 

 not scrobiculate ; glabella nearly spher- 

 ical, three furrows on each side, two 

 upper obscure, lower strong and curved 

 down to the neck furrow ; eyes faceted 

 minutely ; facial suture ending on the 

 external margin near the angles, in 

 front continuous and submarginal ; 

 thorax 11 joints; pygidium 3 segments, 

 free at their ends ; labrum subtrigonal, 

 with a marginal furrow; no rostral 

 shield. Type S. mirus. 

 canadensis, Billings, 1866, Catal. Sil. Foss. 



Antic, p. 64, Anticosti Gr. 

 mirus, not American. 



parvus, Billings, 

 1865, Pal. Foss., 

 vol. 1, p. 180, 

 Chazy or Black 

 Riv. Gr. 

 romingeri, Hall, 

 1867, 20th Rep. 

 N. Y. St. Mus. 

 Nat. Hist., p. 425, Niagara Gr. 

 SPHiEROCORYPHE, Angelin, 1852, Palseonto- 

 logia Scandinavica. [Ety. sphaira, ball ; 

 koryphe, top of the head.] Cephalic 

 shield convex, genal angles spined ; 

 glabella spheroidal an- 

 teriorly, two lateral 

 furrows; eyes promi- 

 nent ; facial sutures 

 cut the lateral mar- 

 gins posteriorly ; tho- 

 rax with ten segments, 

 axial lobe narrower 

 than lateral lobes ; 

 pleurae terminate in 

 short spines ; pygid- 

 ium composed of three 

 segments, anterior one 

 produced in two 

 spines. Type S. gran- 

 ulata. 

 robusta, Walcott, 1875, 



Cin. Quar Jour. Sci., FiG.iOOl.-Spheero- 

 vol. 2, p. 273, Trenton coryphe robusta. 

 Gr. 

 salteri, Billings, 1866, Catal. Sil. Foss. 

 Antic, p. 63, Anticosti Gr. 



Fig. 1060.— Hphserexochus 

 parvus. Upper and side 

 view of glabella. 



