MOOK, ^ ARJATIOX IX tiPIRIFER MUCKOXATUS 



19;^, 



Spirifer mucronatus mut. thedfordense — Continued 



Adult Stage 



A 



Neanic Stage 



Number Width Height 



461 36mm. 28mm 



462 32 29 



463 33 28 



464 35 26 



465.,... 30 22.5 



466 33 23.5 



467 36 23.5 



468 30 24 



489-605 inclusive = 



606 32 32 



607 31 31 



608 23 25 



609 28.5 25 



610 



611 35 28 



614 33 26 



615 36 31 



616 



617 36 30 



618 31.5 23.5 



619 



620 38 31.5 



621 



622 27 29 



623 23.5 20.5 



624 32 25 



625 31 28 



626 



627 34 31.5 



628 31 26 



629 



630 30 30.5 



631 28 20 



632 32 29.5 



633 30 20 



634 27 17 



635 30 18 



036 27.5 24 



637 37.5 26 



638 25.5 21 



6.39 37 27.5 



640 27 28 



641..,.. .36 32 



642 27 26 



643 27 28.5 



Index 

 (reverse) 



. .777 



.906 



.848 



.742 



.750 



.712 



.652 



.800 



Index 



1.28 

 1.10 

 1.17 



.34 



.33 



,40 

 .53 



,25 



Spirifer mucronatus mut. 



1.000 

 1.000 



1.086 



.877 



.800 

 .757 

 .861 



.833 

 .746 



.828 



1.074 

 .711 



.781 

 .903 



.926 



.838 



1.016 

 .714 

 .921 

 .666 

 .629 

 .600 

 .872 

 .693 

 .823 

 .743 



1.037 

 . 888 

 .962 



1.055 



1.00 



1.00 



.92 



1.14 



1.25 

 1.26 

 1.16 



1.20 

 1.34 



1.20 



.931 

 1.14 



1.28 

 1.10 



1.07 

 1.19 



.983 

 1.40 

 1.08 

 1.50 

 1.58 



66 



14 



44 



21 



34 



964 



125 



03 



947 



Width 



36mm. 

 32 

 33 

 35 

 30 

 33 

 36 

 30 

 alpenense 



32 

 31 

 23 



28.5 



35 

 33 

 36 



36 

 31.5 



38 



27 



23.5 

 32 

 31 



34 

 31 



Height Index 



(reverse) 



30 



28 



32 



30 



27 



30 



27.5 



37.5 



25.5 



37 



27 



36 



27 



27 



21mm. 



19.5 



18.5 



17 



16.5 



18 



16 



16 



18 

 17 

 11 

 15 



13 

 15 



20.5 



14 

 17.5 



18 



16.5 

 12 



16 



18.5 



15.5 

 12 



18.5 



11.5 



18 



13 



11.5 



10 



13.5 



17 



10 



17 



16 



18.5 



10 



16 



.583 

 .609 

 .560 

 .486 

 .550 

 .545 

 .444 

 .533 



.562 

 .516 



.478 

 .526 



.371 

 .454 

 .569 



.388 

 . 555 



.473 



.611 

 .510 

 .500 

 .596 



.450 



.387 



.616 

 .410 

 .562 

 .433 

 .426 

 .333 

 .490 

 .453 

 .392 

 ,459 

 ,592 

 ,513 

 .370 

 592 



Index 



1.71 

 1.64 

 1.78 

 2.05 

 1.81 

 1.83 

 2.25 

 1.S75 



1.77 



1.82 

 2.09 

 1.90 



2.69 

 2.20 

 1.75 



2.57 

 1.80 



2.11 



1.63 

 1.95 

 2.00 

 1.67 



2.19 



2.58 



1.62 

 2.43 

 1.77 

 2 . 30 

 2.. 34 

 3.00 

 2 . 03 

 2.20 

 2.55 

 2.17 

 1.68 

 1.94 

 2.70 

 1.68 



