5. Iais pubescens (Dana) var. longistylis Chilton. Chilton, 1912: 132, 134.

“On Sphaeroma quoyana, Marlborough Sounds and Hawke's Bay: The difference between it and the typical form of the species is sometimes so distinct that I have at times almost been inclined to give it a different specific name, especially as it appears to be always associated with a different species of Sphaeroma.”

The description of the uropods and the host mentioned leave little doubt in my mind that this reference is to Iais californica as figured above.

Of the other specimens mentioned, four distinct categories seem to demand further investigation—those found on Erosphaeroma gigas, those on Isocladus armatus, those found on seaweed, and those found under stones at the mouths of freshwater streams.