94. TRANSACTIONS OF THE RoyAL CANADIAN INSTITUTE. [VOL. 
Fig. 6 and 7—Bellerophon (Cymbularia), sp. indet... 0.0.0 000 0c ee en eee 
Fig. 6, Umbilical view of cast. 
Fig. 7, Median view of cast. 
Pigs: 3.and 0-——Haomtphalus intnor isp nov... 2:-/<\6 pees 1d Sa Oe meet oe ee 
Fig. 8, Apical view of cast, X2. 
Fig. 9, Apical view of wax squeeze of mould of exterior, XK 2. 
Figs. 1o.and 11—Lt0s pire StevensOnt, SD. NOV 6.5.4. 65s oGslen sss es oan eee 
Fig. 10, Apertural view of cast. 
Fig. 11, Apical view of cast. 
Figs. 12, 13 and 14—-Modiomor pha: acumtnata, Sp. now. 20.02. ca ee ce wes 
Fig. 12, The left shell from a well preserved specimen. 
Fig. 13, Cast of the right valve. The hinge apparatus and the 
posterior muscle scar are not preserved. 
Fig. 14, Interior of left valve of a smaller specimen doubtfully of the 
same species. The posterior margin and the beak are broken and 
have been restored in dotted lines. .The ventral part of the pallial 
line is not preserved but the hinge apparatus is well shown. 
id Oe WV IDE CLL EL USPC Rr OL canoe of ered cian WEL 0 ol AWiluy aiads UVa iat sharia okey le eee 
Cast of a left valve. The ventral and posterior margins are not 
exposed in the specimen. The dotted line is restored. 
Pig. t6——Siroploniena tmmOSIPiaia, SPO). 8 6.) nia y a Ase Hakko Kes ae i ee 
Ventral valve and section of same. 
ENS Git — SEO PULOCOM IE: NPs WIUEL sh 000 cr otc Goh Aa aid Se ad by ap ane ee ee 
Pedicle valve natural size and portion of surface X 10. 
Pig, T8——Sivopneod oma: sp tndeb wt a ake hl ON ee Neh ae. ca A, ae 
Decorticated pedicle valve much restored. 
ig. -LO-—BUmastus Cl. MOvUs, AGHA. 8 SE UE eek Nes. woe Ul OE Re ele Ee ee 
Cephalon with left side restored. Posterior margin uncertain. 
FG: 20-—EROnnUrUs Cl. PUNGCLALUS, DIUM J. Oe He os aie el sndiake oe ee 
Pygidium. Lateral margins not indicated, X2. 
PLATE, ON. 
Figs. 1; 2,:and 3—Streptelasma tntegriseplatum, Sp. NOU... 2. ce sce een 
Fig. 1, Vertical section. 
Fig. 2, Transverse section. 
Fig. 3, Tangential vertical section. 
Figs.4 and 5—Sirepielasma'ct rasiicum) Billings : 0420. sie co else ee 
Fig. 4, Vertical section. 
Fig. 5, Transverse section. 
Bigs G—-Halysites catenulanta, LAnmGeus: ris. 4k 8 ce ate ie 2 as 6 eee Se 
Vertical section X2. 
Pip 7 AMOCOpellad GIDantCd, SP. NOVis o0./2. > eisai eae vio 2 see De eee ame 
Vertical section. 
Fig. 8—Huronia SO PLGA SP" POUR E A hole Sie Tei tA. 8 acre eRe (a8 Vk Neh LEED Ln a a 
Vertical median section of siphuncle restored. The vertical lines 
represent the vertical radiating lamelle. 
Big 1 SALHLF OTE (OT SPE PPOEES ect e dee qy ihn SM Den etn be bee wy eh 21 at SNR ew ry Ra 
Cast of the only specimen. Note notch in anterior ventral margin. 
Fig: 1Q-—ENndoceras UUGSONICUIN, SPO NOU! ui) bie Sieve opie © = sie bed a el epete en Wis wees 
Vertical section through siphuncle and shell. 
56 
61 
68 
54 
34 
16 
49 
49 
80 
80 
13 
12 
27 
55 
72 
