194 



LAMELLIBEANCHIATA. 



Macrodon, Lycett, 1845, Murch. Geo. Chelt. 

 [Ety. macros, long ; odous, a tooth.] 

 carbonarius, Cox, 1857, (Area carbona- 

 rius) Geo. Sur. Ky., vol. 3, Coal Meas. 

 [Sig. pertaining to coal.] 

 chemungensis, Hall, 1870, Prelim. Notice 

 Lam. Shells, Chemung Gr. [Ety. 

 proper name.] 

 cochlearis, Winchell, 1863, Proc. Acad. 

 Nat. Sci., Chemung Gr. [>Sig. spoon- 

 shaped.] Prof. Hall suggests that it is 

 a syn. for M. jyarvus. 

 curtus, Dawson, 1868, Acad. Geol., Carb. 



[Sig. short.] 

 delicatus, Meek & Worthen, 1870, Proc. 

 Acad. Nat. Sci., Coal Meas. [Sig. 

 delicate.] > 



hamiltonise. Hall, 1870, Prelim. Notice 

 Lam. shells. Ham. Gr. [Ety. proper 

 name.] 

 hardingi, Dawson, 18 68, Acad. Geol., 



Carb. [Ety. proper name.] 

 micronema, Meek & Worthen, 1866, 

 Proc. Aca<l. Nat. Sci., Chester Gr. 

 [Sig. a small thread.] 

 obsoletus, Meek, 1871, Keg. Rep. Univer- 

 sity W. Va., Coal Meas. [Sig. ob- 

 solete.] 

 ovatus. Hall, 1870, Prelim. Notice Lam. 



shells, AVaverly Gr. [Sig. ovate.] 

 parvus, White & Whitfield, 1862, Proc. 

 Best. Soc. Nat. Hist., vol. 8, Kinder- 

 hook Gr. [Sig. small.] 

 shubenacadiensis, Dawson, 1868, Acad. 



Geo., Carb. [Ety. proper name.] 

 tenuistriata. Meek & Worthen, 1867, Proc. 

 Acad. Nat. Sci., Coal Meas. [Sig. fine- 

 lined.] 

 Matueria, Billings, 1858, Can. Nat. & Geo., 

 vol. 3. [Ety. proper name.] 

 tenera, BiUings, 1858, Can. Nat. & Geo., 

 vol. 3, Trenton Gr. [Sig. tender, del- 

 icate.] 

 Megalomus, Hall, 1852, Pal. N. Y., vol. 2. 

 [Ety. mrgdii; great; o//»b, shoulder.] 

 canadensis, Hall, 18.i2, Pal. N. Y., vol. 2, 

 Guelph Gr. [Ety. proper name.] 

 Megamisonia, Hall, 1859, Pal. N. Y., vol. 3. 

 [Ety. ynega, great;, amhon, the boss of 

 a shield.] 

 aviculoidea, Hall, 1859, Pal. N. Y., vol. 3, 

 Low. Held. Gr. [Sig. like an Ariada.^ 

 bellistriata. Hall, 1859, Pal. N. Y., vol. 3, 

 Oriskany sandstone. [Sig. beautifully 

 striated.] 

 can<ellata. Hall, I860, Can. Nat. & (ieo., 



vol. 5, Silurian. [Sig. cancellated.] 

 cardiiformis. Hall, 1843, (Pterinea cardii- 

 formis) Geo. Rep. 4th Dist. N. Y., 

 Cornif. Gr. [Sig. like a Canlniti>.] 

 cordiformis, see Mytilarca cordiformis. 

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

 Phil., Cin'ti Gr. [Ety. proper name.] 

 This shell probably belongs to the 

 genus Ambonychia. 

 lamellosa. Hall, 1859, Pal. N. Y., vol. 3, 

 Oriskany sandstone. [Sig. made of 

 thin plates.] 



lata, Hall, 1859, Pal. N. Y., vol. 3, Low. 



Held. Gr. [Sig. wide, expanded on 



the posterior slope.] 



lyoni, syn. for Cardiopsis radiata., 



mytiloidea. Hall, 1859, Pal. N. Y., vol. 3, 



Low. Held. Gr. [Sig. like the Mi/tilus.] 



oblonga. Hall, 1859, Pal. N. Y., vol. 3, 



Low. Held. Gr. [Sig. oblong.] 

 obscura. Hall, 1859, Pal. N. Y., vol. 3, 



Low. Held. Gr. [Sig. characters ob- 

 scure.] 

 ovata, syn. for Mytilarca mytilimeris. 

 ovoidea, Plall, 18.59, Pal. N.Y., vol. 3, Low. 



Held. Gr. [Sig. ovoidal.] 

 rhomboidea. Hall, 1859, Pal. N. Y., vol. 



3, Low. Held. Gr. [Sig. rhomboidal.] 

 spinneri. Hall, 1859, Pal. N. Y., vol. 3, 



Low. Held. Gr. [Ety. proper name.] 

 striata, Hall, 1860, Can. "Nat. & Geo., vol. 



5, Silurian. [Sig. striated.] 

 subcordiformis. Hall, 1877, Pal. N. Y., 



vol. 5, Up. Held. Gr. [Sig. some- 

 what like 3f. cordiformis.] 

 suborbicularis. Hall, 1859, Pal. N. Y., vol. 



3, Low. Held. Gr. [Sig. somewhat 



orbicular.] 

 Megcqikra, Meek & Worthen, 1866. The 



name was preoccupied. 

 Micivdan, Conrad, 1842, Jour. Acad. Nat. Sci., 



vol. 8. This name was applied by 



Agassiz to a genus of fish in 1833, and 



was also preoccupied for a genus of 



insects. 

 bdllstriata, Conrad, 1842, .Jour. Acad. Nat. 



Sci., vol. 8, Ham. Gr. [Sig. beautifully 



lined.] 

 comjilanatiis, Hall, 1870, Prelim. Notice 



Lam. .shells. Ham. Gr. [Sig. smoothed.] 

 grrgitriii,, Hall, 1870, Prelim. Notice Lam. 



shells. Hum. Gr. [Sig. gregarious.] 

 rescrvatvs, Hall, 1870, Prelim. Notice Lam. 



shells, A\'averly Gr. [Sig. preserved.] 

 lenuisfriuUi, Hall, 1870, Prelim. Notice 



Lam. shells. Ham. Gr. [Sig. finely 



lined.] 

 MoDioLA, Lamarck, 1801, Syst. An. sans 



Vert. [Ety. modiolus, a small measure 



or drinking vessel.] 

 avonia, Dawson, 1868, Acad. Geol., Low. 



Carb. [Ety. projier name.] 

 concnitrica, see Modiomorpha concentrica. 

 lingualis, see Lithophaga lingualis. 

 metella. Hall, 1870, Prelim. Notice Lam. 



shells, Chemung Gr. [Ety. proper 



name.] 

 minor. Lea, 1852, Jour. Acad. Nat. Sci., 



2nd series, vol. 2, Coal Meas. [Sig. 



less.] 

 obtusa, see Modiolopsis obtusa. 

 pooli, Dawson, 1868, Acad. Geol., Low. 



Carb. [Ety. proper name.] 

 pnocedens, Hall, 1870, Prelim. Notice 



Lam. shells, Chemung Gr. [Sig. sur- 

 passing, going before.] 

 wyomingensis. Lea, 1852, Jour. Acad. 



Nat. Sci., 2d series, vol. 2, Coal Meas. 



[Ety. proper name.] 



