Dear Goose

I believe I got the assignment of Zygothuria lactea as Perrier 1902 from Deichman

Deichmann, E., 1930. The Holothurians of the Western part of the Atlantic Ocean. Bulletin of the Museum of Comparative Zoology, Harvard University. 71(3):44-226.

But there is also the Heding stuff

Heding, S.G., 1942. Holothurioidea. Part II. Aspidochirota - Elasipoda - Dendrochirota. The Danish Ingolf Expedition 1895-1896. 4(13):3-39 and 2 plates.

Reveling in retirement