270 PALEONTOLOGY OF THE EUREKA DISTRICT. 
LOWER SILURIAN. 
POGONIP GROUP. 
[The letter C in the first column denotes that the species also occurs in the Cambrian.] 
5 
a KE tig 
& | a |AS 
° a ok 
Genera and species. Al | Fie) Remarks. Page. 
é d = 
g\2 | 83 
5 | 3/2 
Qa | a |e 
RHIZOPODA. 
Receptaculites ellipticus, n. sp -----------|------ 
elongatus, 0. Sp.--.-------|------ a 
mammillaris Newberry --|..---- x 
HYDROZOA. 
Graptolithus, sp. ?..------------+++--++++-|e----- x 
ACTINOZOA. 
Monticulopora, sp ?.--..----------+-++-+++|------ > an PEPE eee errr rrr rt reer tere rr errr err tnnn Crernn 60 
POLYZOA. 
Ptilodictya, sp. ?..----------- ---+++---0+-|------ 5 ane Be Serre eee eee eS eee eee Gecnonoy brsessece 
BRACHIOPODA. 
Lingulepis Mera H. & W ..-..----.------ (Ob. | Bseeeel|Eeasse Types from the Eureka and White Pine Districts, 12 
Nevada. - 
{minuta H. & W..-..----.---- O) NWeeassdbecoss Type from Eureka District....-....---.------------ 13 
Lingula ? manticula White.----.--------- (Ch bae=cel|hasons Type from the Schell Creek Range, Nevada. .......- 13 
Lingula sp? ..-------------+----++++++++-[-eeee-]eeeee 00 | pecontmertecececenootacnds cas cacn sneer corearecstesnas.| Peoseosts 
Obolella ? ambigua, n. sp - - K |e ee eee) owen ee] ee ee ee eee cee ee eee ee cee ne cee ee coe ee ene ee cee e ee 67 
discoidea H. & W-- Cc. L. | Type from Eureka District ...........-.-..-----.--- 14 
Acrotreta gemma!’ Billings.- Type from Calciferous Formation of Newfoundland. 17 
sp. 1 ....--------- .| Like A. subconica Kutorga.....--..----------------|--------- 
Schizambon typicalis, n. sp...------------| XK |------|-eeee- esse eee eee ce eee eee es cee eee e ees eee ee eee eee ee este ee: 70 
Leptena melita H. & W..-.- Type from Eureka District ......-...--...-..--.---- 22 
Strophomena Nemea H. & W. Type from White Pine District, Nevada..... seuss 71 
Orthis Hamburgensis, n. sp -- Rec Hao ae SBC Se CUS neEEo Seon Son aacoecdas hoe seserecans 73 
Lonensi8, 0. 8p --------------0-2--cfemmena| XK [oneene|one- ee ence nnn neem en enn mre enn mmm enmmcrecercennens 74 
perveta Conrad ... Trenton of Wisconsin, Chazy of Canada, eto.-......- 72 
Pogonipensis H. & W..-.-...--- Geol. Expl. Fortieth Par., vol. iv, p. 232.......--.---- Lae eanes 
testudinaria Dalman.-....-------.]------ Trenton Group species of New York, Canada, etc... 72 
tricenaria Conrad..........--.-..-|------ Trenton Group species of New York, Canada, etc.. 74 
SP. 9 - 2-2-2 cen n ee ene cee ene cee een eens K acecen|ocescn|eccc cc cece cw cncc ee cncenes cate cere ce ceme enna nner nemnnnelorrennsen 
Fy en] prose spaeene bbs -Obeaeeseseeee] Feeses|| 4 ||) Wb | Poooococeocmocesaooe on Socoe Sabedd sac ac acm os cea t| en ae =a 
Streptorhynchus minor, n.8P.--..-------|--e0--] XX fesenes [ee neeeeee cece cece teeter etter cette ere cer ee reeee es 75 
Porambonites obscurus H. & W.....-----|------|------]-- .| Geol. Expl. Fortieth Par., vol. iv, p. 234.........-----|.-----+-- 
Triplesia calcifera Billings...-.---------- x Calciferous formation of Canada*.....-.----.--..--- 75 
LAMFELLIBRANCHIATA. 
Tellinomya contracta Salter?..-...------].----- x Uz 
? Hamburgensis, 0. Sp --.---.-|------ SM | pees secon neem nh nen enn nemecueleenee 
Modiolopsis occidens, n. sp.-.------------|------ x Uz. 
Pogonipensis, 0. sp..-..-----|------ x 106 
SDP. Pon - onan c naw s cen nwennen=[aue === |ennm a= U. 
17 Identified by Mr. Meek from Malade City, Utah. Hayden’s Report for 1872, p. 464. 
