272 
BULLETIN OF THE BUREAU OF FISHERIES 
So far as I can learn, the genus Phyllopus has not previously been reported 
anywhere along the eastern seaboard of North America, hence two female specimens 
recognized by Dr. C. B. Wilson in a vertical haul from 80 meters off Penobscot 
Bay, April 10, 1920 (station 20097), are of interest. 
Genus Pleuromamma 
Four species of this genus have been taken occasionally in the Gulf of Maine — 
P. abdominalis (Lubbock), P. gracilis (Claus), P. robusta (Dahl), and P. xiphias 
(Giesbrecht) . These are all true oceanic forms, widespread on the high seas in 
tropical and temperate oceans, and as they are only strays in the Gulf of Maine a 
brief outline of their geographic distribution will suffice. 
P. abdominalis has been taken at many localities in the eastern side of the 
Atlantic from the Cape of Good Hope (Wolfenden, 1911) to the west of Ireland 
(Farran, 1908), in the North Atlantic between England and longitude 46°, and in 
the Gulf of St. Lawrence (Herdman, Thompson, and Scott, 1898). There are many 
records for it in the Mediterranean; it has been taken repeatedly in the Red Sea and 
right across the northern part of the Indian Ocean (Thompson and Scott, 1903; 
Wolfenden, 1905); commonly in the Malay Archipelago (Cleve., 1901; A. Scott, 
1909) ; and at stations widely distributed over the Pacific, both south and north of 
the Equator, including San Diego, Calif., where Esterly (1905) describes it as common. 
P. gracilis has been found over much the same geographic range in the eastern 
Atlantic (Ireland to the Cape of Good Hope), in the Mediterranean, Red Sea, 
Indian Ocean, and Pacific, but has not been recorded so often. 
P. xiphias is so far known from the Atlantic between the latitudes of Ireland 
and the Cape of Good Hope, the Indian Ocean, Malay Archipelago, and Pacific, 
where it has been reported at San Diego (Esterly, 1905) and in the tropical belt 
between 3° S. and 20° N., 99° W. and 160° E. (Giesbrecht, 1892). 
Up to the present time P. robusta is known only from the Atlantic between the 
tropical belt on the south (Dahl, 1893) and the latitudes of the Faroe Channel and 
the coast of Norway on the north (Sars, 1903), from the Mediterranean, and from 
the Red Sea. It is, it seems, the most northerly of the four species of the genus here 
mentioned and the only one which has occurred often enough at the stations of the 
International Committee for the Exploration of the Sea in the northeastern Atlantic 
province to be treated by T. Scott (1911) in his resume. 46 
Previous records for the four species of Pleuromamma off the Atlantic seaboard 
of North America, outside the Gulf of Maine, are as follows: 
P. abdominalis, near Sambro Bank and outside the continental edge off Nova 
Scotia, June and July, 1915 (Willey, 1919, three stations); also Gulf of St. Lawrence, 
as just mentioned. 
P. gracilis, two stations on a line across the continental shelf off Marthas Vine- 
yard August, 1914, and one off the continental edge southeast of Georges Bank, 
July 22 of that same year (stations 10220, 10258, 10260, and 10261; also one record 
east of the Grand Banks (Murray and Hjort, 1912. p. 654). 
« The more important locality records for the genus have been collected by Giesbrecht (1892), Thompson and Scott (1903), A. 
Scott (1909), Wolfenden (1911), Farran (1908), T. Scott (1911), Sars (1903), and van Breenem (1908). 
