202 



ANNALS NEW YORK ACADEMY OF SCIENCES 





Spirifer mucronatus 



mut. alpenense — 



Continued 











Adult Stage 



A 







Neanic 



Stage 





Number 

 437 



Width 

 . 29mm. 



Height Index 

 (reverse) 



19 . 5mm. . 672 



Index 

 1.48 



Width 

 29mm 



Height Index 

 (reverse) 



. 11 . 5mm. . 396 



^ 



Index 

 2.52 



438 



. 27 



19.5 



.709 



1.38 



27 



9.5 



.351 



2.84 



439 



. 29 



22 



.758 



1.31 



29 



17 



.586 



1.70 



440 



. 30 



19 



.633 



1.57 



30 



14 



.466 



2.14 



441 



, 32 



20 



.625 



1.60 



32 



. 14 



.437 



2.28 



442:.... 



, 29 



18 



.620 



1.61 



29 



10.5 



.362 



2.76 



443 



, 29 



13.5 



.465 



2.14 



29 



10 



.344 



2.90 



444 



22 



11 



.500 



2.00 



22 



9 



.409 



2.44 



445 



26.5 



19 



.716 



1.39 



26.5 



11.5 



.433 



2.30 



446-468 inclusive 



= Spirifer mucronatus mut. 



thedfor 



dense. 







469 



32 



20 



.625 



1.60 



32 



12.5 



.390 



2.56 



470 



32 



21 



.656 



1.52 



32 



13.5 



.421 



2.37 



471 



28 



20 



.714 



1.40 



28 



13 



.464 



2.15 



472 



28 



26 



.928 



1.07 



28 



16 



.571 



1.75 



473 



35 



23 



.657 



1.52 



35 



16 



.457 



2.18 



474 



32 



19 



.593 



1.76 



32 



12.5 



.390 



2.56 



475 



32 



20 



.625 



1.60 



32 



13 



.406 



2.46 



476 



29.5 



20 



.677 



1.47 



29.5 



12 



.407 



2.45 



477 



25 



17 



.680 



1.47 



25 



12 



.480 



2.08 



478 



29.5 



24 



.814 



1.22 



29.5 



15 



.508 



1.96 



479 



28.5 



22 



.771 



1.29 



28.5 



14.5 



.508 



1.96 



480 



31 



21 



.677 



1.47 



31 



13 



.419 



2.38 



481 



30 



21 



.700 



1.42 



30 



13 



.433 



2.30 



482 



38 



18.5 



.486 



2.05 



38 



13 



.342 



2.92 



483 



31.5 



23 



.730 



1.36 



31.5 



12.5 



.396 



2.52 



484 



29.5 



22.5 



.763 



1.31 



29.5 



14 



.474 



2.10 



485 



32 



23 



.718 



1.39 



32 



10.5 



.327 



3.04 



486 



.... 



.... 



.... 



.... 



.... 



.... 



.... 



.... 



487 



36 



21 



.583 



1.71 



36 



12 



.333 



3.00 



488 



.... 



.... 



.... 



.... 



.... 



.... 



.... 



.... 



489 



31 



20.5 



.661 



1.51 



31 



. 14.5 



.475 



2.13 



490 



26 



22 



.846 



1.18 



26 



11.55 



.442 



2.26 



491 



31 



21.5 



.693 



1.44 



31 



13.5 



.435 



2.29 



492 



31 



17.5 



.564 



1.77 



31 



12.5 



.403 



2.48 



493 



25 



22 



.880 



1.13 



25 



14 



.560 



1.78 



494 



30 



17.5 



.583 



1.71 



30 



13.5 



.450 



2.22 



495 



.... 



.... 



.... 



.... 



.... 



.... 



.... 



• • • . 



496 



28 



21.5 



.767 



1.25 



28 



11 



.392 



2.54 



497 



26 



21 



.807 



1.23 



26 



15 



.577 



1.73 



498 



24 



21.5 



.895 



1.11 



24 



15 



.625 



1.60 



499 



27 



22 



.814 



1.22 



27 



11 



.407 



2.44 



500 



29 



23 



.793 



1.26 



29 



12 



.413 



2.41 



501 



30 



21 



.700 



1.42 



30 



13 



.4.33 



2.30 



502 



35 



23 



.657 



1.52 



35 



13.5 



.385 



2.-59 



