SCYPHOMEDUSAE COLLECTED BY STEAMER ALBATROSS. 



193 



PERIPHYLLA HYACINTHINA Steenstrup. 



Periphylla hyacinthina Steenstbup, 1837, Act. Mus. Hafniensis. — Mayer, 

 1910, Medusae of the World, vol. 3, p. 543, figs. 342 and 343. 



Periphylla hyacinthina forma dodecabostrycha Mayeb, 1910, Medusae of 

 the World, vol. 3, p. 546. 



The Albatross obtained 21 specimens of this common deep-sea 

 medusa among the Philippine Islands between depths of 338 and 

 1,291 fathoms, as follows: 



Station. 



D 5201 and D 5203, Cat. No. 28704, 

 U.S.N.M., off Limasaua Island. 



Date. 



1908. 

 Apr. 10 



1909. 

 Mar. 2 



D 5373, near Marinduque Island, 



about 15 miles off shore. Cat. 



No. 28705, U.S.N.M. 

 D 5379, about 37 miles off Mompog Mar. 4 



Island, near Marinduque Island. I 



Cat. No. 28706, U.S.N.M. 

 D 5471, from about 15 miles off j June 19 



Point, Light, eastcoast of Luzon. 



Cat. No. 2873S, U.S.N.M. 

 D 5486, from 6 miles off Batobobo July 31 



Point, Panaon Island. 

 D 5497, about 10 miles off Bantigui Aug. 3 



Island. 



Depth. 



D 5507, off northern Mindanao. 



Cat. No. 2S703, U.S.N.M. 

 D 5628, Pariente Strait, about 7 



miles from St. Lamo Island. 



Cat. No. 2S707, U.S.N.M. 



D 5647, Buton Strait 



D 5652, Gulf of Boni 



Aug. 5 

 Nov. 30 



Dec 16 

 Dec. 17 



Fathoms. 

 554-775 



338 



920 



568 



585 

 960 



425 

 1,291 



519 

 525 



Character of 

 bottom. 



Gray sand and 

 mud and 

 green mud. 



Soft sand 



Green mud 

 and fine 

 sand. 



....do 



Gray mud 



Green mud. 



Size and 

 number of 

 specimens. 



2 large, 190 

 mm. wide, 

 105 high. 



2 large 



4 medium . 



7 large and 



medium. 

 1 



2 medium. 

 1 medium. 



.do. 

 .do. 



Variety. 



Dodecabostrycha. 



Do. 



Do. 



Hyacinthina. 



Dodecabostrycha. 

 Do. 



Do. 

 Hyacinthina. 



Do. 

 Do. 



Genus LINUCHE Eschscholtz, 1829. 



Linuche Eschschultz, 1829, Syst. der Acalephen, p. 91. — Mayeb, 1910, 

 Medusae of the World, vol. 3, p. 557. 



Generic characters. — Coronatae with 8 rhopalia, 4 perridial, and 

 4 interradial. Eight tentacles, 16 marginal lappets; with hernia-like 

 sacs of the gastrovascular cavity protruding from the floor of the 

 subumbrella. Eight gonads grouped in four pairs close to the four 

 perradii. The central stomach opens by four perradial ostia into a 

 ring-sinus, which in turn breaks up into 16 branching, radiating 

 pouches in the lappets. A marginal ring canal is present in the 

 Pacific L. aquila, and according to Vanhoffen also in L. unguiculata 

 of the Atlantic, but I believe it is not always present in the Atlantic 

 form, for I am unable to demonstrate it by inflation of the pouches 

 with air in the living or recently preserved specimens. 



101825°— Bull. 100—17 13 



