402 W. E. RITTER AND M. E. JOHNSON 
TABLE 2 
Length measurements of the zooids of wheels of chains VII and VIII 
Horizontal lines indicate end of wheels. 
Double lines indicate one wheel lost. 
Unit —1 mm. 
NO. | CHAIN VII CHAIN VIII CHAIN VilI—continued CHAIN VIII—continued 
: i 
iL epteetee 7 Sl SW etOe 4 AGE Ly ai reais 132 7 p12e6e a Sie ee 20.5 20.9 
Dae aa, TG) Ouest |" (OSB adn 13h AO Onl Saw | 19.2 | 18.6 
5 lagi Fok| a Se OLo || ee OulaSeerics 12,9, | a eae ea 118.6 | 18.6 
As ee aT, Saeed | 16 vee 13.0| 12.9| 84.....119.8| 17.2 
eae Fa8)| Oa Mares: | AGe Sul age oes 122030390) Sheen 20.7 | 19.8 
Gee Shor eee aie | “G8: edo eu 14.0.) 1324) (S63 99:7 | 1928 
aye: S46:| “Sia | “7 Alinag e420" | Sisal) iyek aoe | 21.9 | 20.2 
Chae Sool 8 Tiere || TBaae Oe aso") AGA eee | 22.5 | 20.4 
Gentine | Sa) 8281 Meer | 7g. «te. 48, | On 80r a | 21.9 | 20.5 
LOM oes sede SS ameee Ss 22a eta 14,3;|12:8)) 90... | 19.8 | 17.5 
i aera: NeSiai| Sak hoe ay ese ke = IACGH 2-40 One A 21.1 | 20.0 
ize Pree 8.2| 8.8| 8.7| 7.6] 52...... | 15.2] 14.0] 92.....| 22.9 | 21.0 
(Soe, eae: OF5 7007 | 822), Seaoge =, . .. | aa) ees Sees | 24:27) 9389 
4c ee (19.5) 10,0") 825s] Be6H) Shee. | 15) | k5eSo 04s 2258) 2342 
ope aoe. S72) 40-0. 8.8). 8.2 nee... 16504) TAR O95 | 24.1 | 21.6 
Ty aes as PeOes 1) HOt PR9u4 | 8.47 sGare. 1654 (15.3) SOG 23.0 | 19.9 
eres. 59.67) AOE S| G8D | Sa aye: 15.0 | 148 |) 9%... 2032008 
1800) OP) 1010) | 83), -Si4 | eae pat | LAOs! 0g. | 98.97) 2089 
TOR ee 9:8.| OF8)/ 1056) 9.1] Bort i525) 13-9 |) 08: | 28-7 \one3 
iene | 10.6] 11.0) 9.8] 8.9] 60.....- 16.6 | 13.2 || 100..... | 24.5 | 22.6 
A UES ae Bese pCO Jee Me i yl eae te. G22) 15.4 Ole ke 24.6 23.4 
7 RR oge 1OK95)) 11-23) LOGS GO| 69. 20 igs ae Beda nk ee 23.6 | 23.6 
DBt we mal LOCRO ll As | Or BeS GSS ae 1 Ol Pea 103" 2... 24.0 | 22.5 
yeaa [PRO Stan “OFS Gron sea | pac Ouiaeseh a04e 2. | 23.9 | 22.1 
fy ae or atdONG | 9.6/8.9 Es. 16.0 |.13-6 | 105..... | 23.0 | 220 
7 aw a tO NO. 71) 1002! “Sabi gee. ase | 16.3 | 18.3 | 106..... 25.1 | 22.2 
oyuaaae se 11) AOwS | “9.8 Sage ue 18.81 17.9 | 107.....| 26.3'| 23.1 
98 Me 11 40 1a | O08) SS gse | 19°61 17.7 || 108..... 2osha eae 
eek eae PU 2SedOuG | 10. Te COES leo ee fama! 17-7 || 109225. 26.4 | 23.4 
86.2.0 Gat SUG ps lee ee eT Yoce isto | 17.1 | WOe eS. 25.5 | 22.9 
See aN (HS | S25 )51029.) MOSaal ra Vefsez | Va 72) ele 22.4 21.3 
SOeN Ae PV 23" |) 187) 99" ee 76.2 | 14:7 
Soe HLL Le eA PE Te ORS (573 ten ee 18.8 | 7s | 
AN wee 12'S) 1214 p23 | LOsSai ea 19 4| 19.4 
Tap eee 13.0 | 11.8 42.3) 10.7 yee 0 19.7 19.4 
SG t eis: 12.9: Tes |G | Ll eee 119.5 | 18.3 
Cy ets Ss hes? | oy | aaa 
Ste i ayes ae al beam 18.6 | 18-4 | 
ees SF (eee 19.3: 16-4 
SORA ae esos bot Tat: | 70rae 20.5 | 19 1 
Bc se 13.6 | 11.6 | go... 22.2 | 20.0 
