44 BULLETIN NO. 30, UNITED STATES NATIONAL MUSEUM. 



Page. 



P. peniciUut, M. & W., I860, pi. xix, fifrs. 6 a-<; 266-267 



P.pUnuf, M. iW., 1860,pl. xx.flg. 3 267-268 



Taxocrinug. Phillips, 1843 268-270 



Forbegiocrinus. dc Koninck &. Le Hon, 1854 270 



Taxocrinus nemiovatiu, M. & W., 1860, pi. xx, figs. 4a-i 272-274 



Skutoidfa. 



Grana/ocrinu*, Troost, 1850 274-275 



O. cornutus, sp., M. & W., 1860, pi. xx, fig. 1 276 



A»Uroidea. 



'SchoeiuifiUr, M. &. W. [1860] 277-278 



S.flmbriatut, M. & W., I860, pL xix, flgs. 7o-d 278-280 



MoUutca. 



Braehiopoda. 



Productus, Sowerby, 1814 280 



P. gciluluf, M. & "W., 1860, pi. XX, figs. 5 a-d 280-281 



Larnellibranchiata. 



Myalina, de Koninck, 1844 281 



M. eoncentrica, M. & W., 1860, pLxix, figs. So-c 281-282 



Toldia, Moller, 1842 282 



r. ? levittriata. M. <fc W., 1860, pi. xx, figs. 7 a and 6 282-283 



Nuculana, Link, 1807 283 



N.? curta, M. & W., 1801, pi. xx, figs. 6 a and 6 283-284 



Gasteropoda. 



Dentalium, Linnaeus, 1758 284 



D. vemutum, M. & "W., 1"861, pL xix.fig. 6 284 



Straparollus, Montfort, 1810 285 ' 



S. gimilis, M.&. W., 1861, pi. xix, figs. 4 a-6 285-286 



<S. similis var. planus, M. Jc W., 1861, pL xix, fig. 5 a-c 286 



Cephalopoda. 



Orthoceras, Auct 286 



O. expansum, M. & W., 1860, pi. xx, figs. 8 a-c 286-287 



INVERTEBRATE FOBSH^ OF THE CHESTER GROUP. 



Sadiata. 



Eehinodermata . 

 Orinoidea. 



Pterotocrinus, Lyon & Uasseday, 1859 288-290 



P. crasgus, M. Jc W., 1860, pi. sxiii, figs. 2 a, 6, and fig. xxix, p. 292 290-292 



P. Chester ensis, M. i W., 1860, pi. xxiii, figs 1 a^, and fig. 30, p. 293 292-293 



Echinoidea. 

 PerischoechinidcE. 



A rchceoeidarig, McCoy, 1844 294-295 



A. mxtcronata, M. & W., 1860, pi. xxiii, figs. 3 a-c 295-296 



MoUxLgca. 



Braehiopoda. 



Productus, Sowerby, 1812 297 



P. parvus, M. & W., 1860, pi. xxiii, figs. 4 o-« 297-298 



Spirifer, Sowerby, 1815 298 



Subgenus Martinia, McCoy, 1844 298 



,S'. (Martinia) glaber var. contractus, M. & W. , pi. xxiii, figs. 5 a, 6 298-299 



La7neUibranchiata. 



Myalina de Koninck, 1844. .\ 300 



M. angulata, M. <fc "W., 1860, pi. rxiii, figs. 7 a, & 300-301 



Schizodus. King, 1844 301 



S. chesterensii, M. &. "W., 1865, pi. xxiii, figs. 6 o, 6 301-302 



Gasteropoda. 



Straparollus, Montfort, 1810 302 



S. planidorsalus, M. &. W., 1860, pi. 24, figs. 2 o-c 302-303 



Pleurotomaria, Defrance, 1826 303 



P. chesUrensis, M. &. W.. 1860, pi. xxiv, figs. 1 a^c 303-304 



Cephalopoda. 



Orthoceras, Anct 304 



O. anntdatocostatum, M. W., 1861, pL xxiv, figs. 3 a, b 304-305 



* axoii-ot, a rope ; a^rrip, a Star. 



