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 Uehersetzungsrecht vorbehalten. 



The Anatomy of a Pteropod, Corolla (Cymbuliopsis) 

 spectaMlis Dall. 



By 

 Harold Heath and M. H. Spaulding \). 



Leland Stanford Jr. University, California. 



With plate 5. 



In 1872 2) Dall described as Corolla spectahilis a species of 

 pteropod found off the coast of southern California. All the specimens 

 secured were destitute of a shell and this characteristic was at first 

 considered normal though the presence in the tow net where this species 

 was secured of "oval, thin, crystalline, gelatinous slipper-shaped shells" 

 led Dall to later express the belief that "-Corolla possessed some sort 

 of a shell hke Cymbulià'\ Subsequently Pelseneer in his work on 

 the thecosoraatous pteropods collected by H. M. S. Challenger de- 

 scribed another specimen taken between Japan and the Sandwich 

 Islands., To this individual were attached several bits of a gelatinous 

 shell that was believed to "correspond to the general form of the shell 

 of Gleba'" and to belong to this genus. It was accordingly named 

 Gleba spectahilis and Corolla became a synonym. 



In 1900 the present authors obtained large numbers of a pteropod 

 in Monterey Bay, California, which showed close affinities with Pel- 

 seneer's genus Cymbuliopsis. As only two species belong to this 

 genus and they are considerably different from the specimens in hand the 

 latter were named C. vitrea. After the manuscript had left our hands 

 Professor Pilsbry kindly called our attention to another paper by 

 Dall^) in which it was shown that Corolla has a shell not like 



1) To the junior author belongs the credit for all work on the 

 reproductive system while the senior author is responsible for the 

 remainder of the paper. 



2) in: Amer. Journ. Conch., V. 7, p. 137. 



3) On the genus Corolla Dall in: Nautilus, V. 3, 1889. 



5* 



