254 PROCEEDINGS OF THE ACADEMY OF [1881. 



1843. Hexacr. Buchii F. A. Roomer. (Platycr. Buohii.) Hartzgcbirsc, p. 9, P). 



12, fii;:. LS. Devonian. Ilartz, Germany. 

 1867. Hexacr. callosus Schultze. Men. Echin. Eifel Kalk, p. 8.^, PI. 9, fig. 3. 



Devonian. Eifel, Germany. 

 Syn. Platycr. rosaceus Goldf. (not Roemer = Coccocrimis). Bonn Museum, 



undefined. 

 1858. Hexacr. costatus Miiller. Monatsb. Berl. Akad. Wissensch., p. 354; Schultze, 



1867, Mon. Echin. Eifel, Kalk, p. 74. Devonian. Eifel, Grrmany. Probably a 



variety of Hexacr. anaglypticus. 

 1838. Hexacr. elongatus Goldf. (Platycr. elongatus Goldf. not Phillips.) Nova 



Acta ac. Loop., xix, i, p. 345, PI. 32, fig. 1; Schultze, 1867, Hexacr. elon- 

 gatus, Mon. Echin. Eifel Kalk, p. 74, PI. 9, fig. 4. Devonian. Eifel, 



Germany. 

 Sijn. Platycr. Goldfussi MUnster. Beitr. z. Petrefactenk, i, p. 32, PI. 1, 



figs. 2 a, b. 

 1838. Hexacr, exsculptus Goldf. (Platycr. exsculptus.) Nova Acta ac. Leop., 



xi.\, i, p. 347, PI. 32, fig. 3 ; Schultze, 1867, Hexacr. exsculptus, Mon. Echin. 



Eifel Kalk, p. 77, PI. 9, fig. 2. Devonian. Eifel, Germany. 

 1843. Hexacr. granuliferus F. A. Roemer. (Platycr. granuliferus.) Versteiner 



Nas.sau's, p. 397. Devonian. Lahnstein, Germany. 

 ■'■■•I860 (?). PI. insularis Eichwald. Lethaea Rossica, i, p. 612, PI. 31, fig. 58. Devonian. 



Isle of Oesel. 

 There is some doubt, whether this is a Hexacrimis. Eichwald describes it with 



five radials, one of them much larger and apparently composed of two pieces, 



which are said to be soldered together. One of the other plates is represented 



as being much smaller. 

 1841. Hexacr. interscapularis Phillips. (Platycr. interscapularis not Miller.) 



Pal. Foss. Cornwall, p. 28, PI. 14, fig. 39; D'Orbigny, 1849, Prodr. d. Pale- 



ont, p. 103; Austin, 1843, Ann. and Mag. Nat. Hist., x, p. 109; Schultze, 



1867, Hexacr. interscapularis, Mon. Echin. Eifel Kalk, p. 79, PI. 8, fig. 5. 



Devonian. Near Plymouth, Eng., and Eifel, Germany. 

 Syn. Platycr. granifer Roemer. 1852, Verb. Naturh. Verein Rheinl., ix, p. 



281, PI. 2, fig. 1 ; Schultze, Hexacr. interscapularis, Mon. Echin. Eifel 



Kalk, p. 79. 

 Syn. Platycr. melo Austin. 1843, Mon. Rec. and Foss. Crin.. p. 48, PI. 6, fig. 



1; Schultze, Hexacr. interscapularis, Mon. Echin. Eifel Kalk, p. 79. 

 Syn. Hexacr. depressus Austin. 1843, Mon. Rec. and Foss. Crin., p. 49, PI. 



6, figs, 2 a-e; Schultze, Hexacr. interscapularis, Mon. Echin. Eifel Kalk, 



p. 79. 

 *1860. Hexacr, Leai Lyon. (Platycr, Leai.) Trans. Am. Philos. Soc, p. 259, PI, 



26, figs, g g'. Upper Helderberg, Dev. Louisville, Ky. 

 1857. Hexacr. limbatus Miiller. Neue Echin. Eifel, p. 248, PI. 2, fig. 1; Schultze, 



1867, Mon. Ecbin. Eifel Kalk, p. 78, PI. 9, fig. 1. Devonian. Eifel, Germany. 

 1857. Hexacr. lobatus Miiller. Neue Echin. Eifel, p. 248, PI. 1, figs. 10-12; Schultze, 



1867, Mon. Echin. Eifel Kalk, p. 84, PI. 10, fig. 6. Devonian. Eifel, 



Germany. 

 1843. Hexacr. macrotatus Austin. Mon. Rec. and Foss. Crin., p. 50, PI. 6, figs. 3 



a-d. Devonian. South Devon, England. 

 Syn. Platycr. Phillipsii D'Orbigny. 1850. Prodr. de Paleont., i, p. 103. 

 Syn. Platycr. tuberculatus Phillips, 1839 (not Miller, 1821). Pal. Foss. 



Cornwall, PI. 60, fig. 39. 



