8 ILLUSTRATIONS. 
Page. 
‘PLATE XXI. Mazodus Kepleri, Newb......-...-...-..- FOOU DONORS Base Gace osc¢ coadocaSscobcacee 272 
Heteracanthus politus, Newb ---.-.----- BE Sn S5gS SOOO aaa. Anne AAaaat ACEO case Sl5e 272 
NBG a] OGL TIS CEELSSELS Nic Ces VV le at ler 272 
Cladodusiconcinnus sNewbesssee a aeie ase een eee eas 272 
Harpacanthus fimbriatus, Stock (sp).----- es Sat R See Se Ree ak eee, MRE 272 
HPV SOMES Stel ares IN CW ee tee liam eee 272 
MXIT. Archeobatis gigas, New) sa. ose qlee alae lm onl lelectra rail 74 
20.000 JG On TEESE NGO 86055 cosces cos see boeseesaedasos sees sone cass osSoosasos 276 
Ctenacanthus compressus, Newb) -----o-- oon oe oe ne n oo eeeninn me - 276 
Gyracanthusanornalus,s NOW Daas =- eee = seen e ease eee ani eee ieee 276 
XXIV. Stethacanthus Altonensis, St. J. & W. (sp) ------------ ---- ---- ---- ------ «2 ---- 278 
O00 Y5 Sicurecr ml ne nGhish MNGi) Naas conooson sods sae ence cadocsep arom socetcseSSsone 280 
Cienacanthus MiGhoni New Dlr emee =i aces eee meee ele eat ee 280 
Asteroptychius elegans, Newb...--. -.----.-.----. +. - 2. 222 - -= == e--2 wn oo== 280 
Hoplonchus;parvulus;) News cece = eee == ee aa ee 280 
Acondylacanthus occidentalis, Newb-.-...--..----- .---------.----. ------------ 280 
XOX Ve Cienacanthus cylindricus, NOW) 22 ses. cee alae on oe eel las Rteme olen eee eee eta 282 
G@tenacanthus Carbo, ING wi bye eee eal io toe eet ee eee alee 282 
Ctenacanthus Wrighti, New): -22- -. 22-22 ---c 2- aie oe ieee =e 282 
XR Vi Petrodusb uttersi. pNG Ww Oees cen eee eee ee eee ner senate 284 
Cladodusiconcinnis,pNéwbeeee cee ease ee se eee Oa eee eee Peete aer 284 
Gladod uspRercelliswN ewer me ia ea tale ee ae ae eee te 284 
GiGanlreimnn Ge, My 05 SS6ocors65 sons oSenonoeaceccoceedeceredco sosocongsosass 284 
HEG sine Lapa GN Dance so Sach choc os ds ao cpendandésacesascensstseqos cages 284 
GoniodusihHertzen,eNGw Dass... = a2 eee = ee eee eee ae aeeotaoter 284 
Callognathus serratus, Newb --.--.---.-------------<-- == =-<- -- ------ + =.= ---- 284 
(Obi Gemmi nor aeanlbhtisy Meni )se Se cee Goes occ cans coco -oasee noes se ascasuscdses 284 
Ctenodus(Dipterus) Nelsons Ne wily eae otek alate ae et eee 284 
Ctenodus (Dipterus) flabelliformis, Newb -....-.----.----..--------------------- 284 
Ctenodus)(Dipterus) levis, Ne wile ae ate =e ara la re oer eat elaale eee eee renee 5 284 
Ctenodus (Dipterus) quadratus, Newb .----...---. .... ..---....---...---. .----- 284 
Ctenodus (Dipterus) minutus, Newb ....-. ..---- 2-2. - <2 2 - nen wen nne ooo 284 
hoshod ws pol uci ss NC Wi ee aera le a ee ale le 284 
(Oyen) ney eh INE oo 6 eee con ete esos ened cs ssSsbossssadoncosos sbegececsa csteéo 284 
(Grier Were IMG le coco adeSoSenebs coco bscsrtesseconrcoosibseteadcesss sane 284 
Ctenodus!sorratus, Newb) --sss- ---- Joe (= 5-22 > eee eee seen eeeee eae eee 284 
Dipterus (Ctenodus) Sherwoodi, Newb.......-.-..-.---------------------------- 284 
Dipterus (Ctenodus) radiatus, Newb.-.-....---..----- .----- -------------------- 284 
SXOXOV ME re by C HOC US {SCC AES, IN CNG Ngee male a ee ee le 286 
Rhynchodus crassus, Newb ....-.-- ------ 0 -6- <<< se ao onns on naan cane eons =o 286 
Gtenacanthusivetnstos,pNew Drees seen eae aaj ele eee eee aeeeetae 286 
XOX hyn chod us OxCaVvalus; NOW Ds sssesee aes acacia = ate oni Aaa etal alee ae tein 288 
Rhynchodustrane ens, NOW) sso sla lccle= = =aelen ===! = nla ale allele 288 
Machsracanthus major New Diss] oes aes eae eee = ein ane alee ae eter 288 
Macheracanthus suleatus, Newb ....-----.-- Beret been csenape sees poacdee bc 288 
Machzracanthus peracutus, Newb ...- ---- ...--- 622 one ence se wene wwe oon wnne 288 
Xxx. Asterosteus stenocephalus, NOwD?:---2- --2<-o-me eee ao ces =o el == eel eee 290 
Goccosteusioceidentalis wNewDi-= = ss== == -le nee ee ee 290 
Coccostensi decipiens yA hee arr asaya eae ee ee ae lah el te 290 
Liognathus spatulatus, New) --.. ..---- 2-2. = oo nnn nnn woe een ne one own 290 
0.0, 6-95, NORTE STIS PTE UGS INN Doo ones Hobo. qcedes Copco Senccoee Casson opedse Ssgocscece 292 
Acantholepis pustulosus, Newb .----. .-----.------ pn eee rene da nee eee ss 292 
Roe Dinichthys ferrell New pi aeeas acess ean eae ates eee ee eee 294 
Dinichth ys) HeriZOvlsiN CW) -<atas/asae as sea ale sa alee eens aaa ee one eee 294 
Dinichthys tuberculatus, Newb .... <. -- 2... << o5 coon ween nnn fae n nen enw onwe 294 
