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OHIO STATE UNIVERSITY 
Department of Columbus Oct, 31, 1940 
Zoology 
Dr, Ifaldo L, Schmitt 
U, S, National Museum 
Dear Waldo : 
, Your request has been put on the emergency list and I am 
ready. to report that I cannot give you much light on the rate of 
development of Arctic Bryozoa (and don't ever ask me too much about 
it in other regions). The identifications are as follows: 
Mounted on card: 
No, 1, Lichenopora verrucaria (Pabr,) 
One colony fully developed, 
2, Hippothoa hyalina (L, ) and Tegella arctica (d’Orbigny), 
Fully developed. Not fully developed, 
3, Smittina (Porella) bella (Busk), 
4, Hippothoa hyalina (Busk), Fully developed, 
5, Lichenopora hispida (Fleming) not fully developed, 
Tondeleyo Crab Trap 
Tegella arctica (d'Crb,), Yoking, no ovicells, 
Lichenopora hispida (Fleming), Regeneration of the colony 
apparently indicates two year's growth. 
Crab Trap No, 404, 
Hippothoa hyalina (L,), Fully developed. 
No, 14-40, Alcyonidium polyoimi (Hassall), On crab antennae, 
Rhamphostomella porosa (O'Donoghue) , Not fully developed. 
No, 17-40, Hippothoa hyalina (L. ), Fully developed, 
Alcyonidium polyoimi (Hassall), On carapace of crab, 
A 
From Crab measured Sept# 24, 1940. 
Lichenopora hispida (Fleming). Not fully developed. 
All of the above are xvell known arctic and northern species 
with the exception of Rhamphostomella porosa 0*Don. which is known 
from Br. Columbia. 
There appears to be but little knovm about the rate of 
growth, as I have gone over a good deal of literature in the attempt 
to find something. Probably there is a wide range, for some species 
never reach more than a couple of mm. across, while others grow quite 
