NO. 3652 ISOPODA AND TANAIDACEA—MILLER 39 
being remarkably large (e.g., Glyptonotus species in the Antarctic and 
Saduria species in the Arctic region). The paucity of valviferans in the 
tropics, however, runs contrary to the abundance of warm water 
species in other isopod suborders and in invertebrates generally. 
Only three isopod species and no tanaidaceans were found on 
Hawaiian buoys, a scanty representation of the fauna there. Two are 
cosmopolitan, Cirolana parva and Sphaeroma walker; the other, Para- 
cerceis sculpta, probably was introduced into Hawaiian waters by 
naval shipping from southern California. 
The Bahaman fauna was represented only slightly better with four 
isopod and one tanaidacean species. The tanaidacean was the cosmo- 
politan Leptochelia dubia. Of the isopods, Paracerceis caudata is a 
common sphaeromatid along the Atlantic and Gulf coasts and in 
Bermuda. The remaining three—Cymodocella species, Accalathura 
species, and Skuphonura species—were found only in the Bahamas 
but doubtless have wider distribution in the Antillean region. 
Regarding generic distribution, half of the 16 isopod genera repre- 
sented in the present study are known to occur along both the Atlantic 
and Pacific coasts of North America. They are Cirolana, Dynamenella, 
Excorallana, Idotea, Janira?, Paracerceis, Sphaeroma, and Synidotea?. 
Actually, however, species of only two genera, Jdotea and Paracercies, 
were collected from buoys on both coasts. All three tanaidacean genera 
represented in the collection have species on both coasts, but Lepto- 
chelia was taken only on Atlantic coast buoys and Anatanais and 
Tanais only on Pacific coast buoys. 
The above listing of Janira and Synidotea as genera common to 
both coasts is questionable for the following reasons. According to 
Wolff’s (1962) tabulations, only one species of Janira occurs on the 
Pacific coast. He gives Vancouver Island and western Canada among 
the localities for Janira maculosa (along with Greenland, Morocco, 
and Corsica), apparently on the basis of Fee’s (1926) and Hatch’s 
(1947) reports. Menzies (1951, p. 123) states, however, that he per- 
sonally has examined the specimens reported by Hatch and is of the 
opinion that they belong in the genus Janiropsis G. O. Sars. He 
thinks the same is probably true of the specimens reported by Fee. All 
other Pacific coast forms previously assigned to Janira by earlier authors 
have been transferred to Janiralata Menzies, Ianiropsis G. O. Sars, 
or Bagatus Nobili (Menzies, 1951; Kussakin, 1962; Wolff, 1962); 
hence, the occurrence of Janira in the Pacific, at least the eastern part, 
is doubtful. The listing of the predominantly North Pacific genus 
Synidotea as occurring both on the Atlantic and Pacific coasts is also 
tenuous, but two circumboreal species (S. bicuspida and S. nodulosa) 
have been reported in the far North Atlantic near Greenland, Labra- 
dor, and Halifax. These are the only reports of Synidotea in the North 
