BERYCOID FISH FAMILY POLYMIXIIDAE LACHNER 193 



shelf as New York. The Pacific species, japonica, is now reported 

 from the Philippine Islands (not included in Herre's 1953 checklist), 

 but not yet known from Indo-Australian waters (Weber and de 

 Beaufort, 1929, p. 215). 



In the future, in concentrated collecting such as was done in Cuban 

 waters by the Atlantis expedition, all the species m.&j be found to be 

 more widely distributed than now known, as well as being locally 

 abundant. The capture in one net haul in Cuban waters of more than 

 300 specimens of loweA, heretofore reported as rare, actually shows 

 how inadequately the seas have been sampled (see discussion, P. 

 lowei) . 



The geographic distribution of nobilis is of interest in view of its 

 possible differentiation in the eastern and western Atlantic faunas. 



The various literature on inshore fishes indicate that differentiation 

 of populations between these two general faunal areas may be expected 

 at all degrees to the specific level; some apparently show no differ- 

 entiation. Actually, no detailed taxonomic study has been completed 

 of any natural group of fishes wherein the species are supposed to 

 inhabit both faunal areas. Some authors have published accounts and 

 lists CNorman, 1935, p. 56) of species common to both faunas, but these 

 should be regarded with considerable skepticism in the absence of 

 critical data. A number of marine invertebrates are apparently 

 common to both faunas. For those interested in comparative geo- 

 graphical distributional patterns the following will be of interest. 

 Holthuis: 1952, page 15, Pontonia domestica, Madeira, Bahamas, and 

 Atlantic coast of the United States from South Carolina to Louisiana; 

 and 1947, page 77, Rhynchocinetes rigens, Madeira, Bermuda. Schmitt: 

 1935, page 128, Penaeus brasiliensis, from about Long Island Sound 

 to Brazil, West Africa, Puerto Rico, St, Thomas; and page 217, 

 Hippa cubensis, Florida to Brazil, West Indies, West Africa, Ascension 

 Island, Puerto Rico, St. Thomas. Rathbun: 1933, page 49, Callinectes 

 marginatus; page 68, Chlorodiella longimana; page 69, Menippe nodi- 

 frons; page 86, Grapsus grapsus; page 87, Goniop>sis cruentata; and page 

 89, Pachygrapsus gracilis; all more or less with the same type of distri- 

 bution as those above. No outstanding population differentiation 

 in these invertebrate forms was noted. 



Genus Polyrnixia Lowe 



Polymixia. Lowe, 1836, p. 198 (type species, Polyrnixia nobilis Lowe), 

 Nemobrama Valencienzies, 1843, p. 40 (type species, Nemohrama wehbii Valen- 

 ciennes) . 

 , Dinemus Poey, 1860, p. 161 (type species, Dinemus venustus Poey). 



I Body moderately elongate ; compressed ; lateral line complete ; teeth 

 in villiform bands on both jaws and on vomer and palatines; dorsal 



