198 



BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



D 5533, August 19, 1909, between Cebu and Siquijor, about 9.5 miles off Balica- 

 sag Island, depth 432 fathoms, bottom green mud and sand. One specimen 

 of A. wyvillei. Cat. No. 286S4, U.S.N.M. 



D 5631, December 2, 1909, south of Patiente Strait, about 4.5 miles off Doworra 

 Island, depth 809 fathoms, bottom green mud. One specimen approaching 

 condition of A. alexandri in having no distinct indentations or furrows at 

 the margin of the central lens. The dimensions of this specimen are given 

 in the table. Cat. No. 28682, U.S.N.M. 



D5650, December 17, 1909, in the Gulf of Boni, about 12.5 miles off Lamulu 

 Point, depth 540 fathoms, bottom green mud. One specimen distorted by 

 pressing upon the bottom of the bottle in which it was preserved, so that its 

 specific affinities can not be determined with accuracy. The medusa was 60 

 mm. wide, central lens 42 mm. wide, with a few faint indentations in its 

 margin. Twenty-four tentacles. Cat. No. 28683, U.S.N.M. 



D5652, December 17, 1909, in the Gulf of Boni about 7.5 miles off Lamulu, 

 depth 525 fathoms, bottom green mud. Four specimens, one of which is 89 

 mm. wide with 31 tentacles and is an A. wyvillei approaching the condition 

 of A. alexandri. Its dimensions are stated in the table. Another specimen 

 has five furrows in the margin of its central lens, but there is a plain-edged, 

 projecting annular ridge on outer side of ring furrow, as in A. bairdii. It 

 thus combines characters of A. loyvillei with those of A. bairdii. This 

 medusa is 51 mm. wide and has 29 tentacles. Two other specimens, one 

 33 and the 37 mm. in diameter, have each 20 tentacles, with the margins 

 of their central lenses notched as in A. loyvillei, while they have well- 

 developed annular ridges which project beyond the margin of the ring 

 furrow, resembling A. bairdii in this respect. Cat. No. 28687, U.S.N.M. 



D 5657, December 19, 1909, in the Gulf of Boni, about 15.5 miles off Oland Point, 

 depth 492 fathoms, bottom gray mud. One specimen of A. loyvillei 54 mm. 

 wide, central lens 41 mm. wide, 25 tentacles. Cat. No. 28688, U.S.N.M. 



Dimensions (in mm.) of some specimens of nontypical and typical A. wyvillei, collected 

 by the "Albatross" in the Philippine Islands. 



Diameter of entire medusa 



Thickness of bell 



Number of tentacles 



Diameter of central lens of exumbrella 



Condition of margin of central lens of exumbrella 



Depth of coronal furrow 



Length of tentacular pedalia 



Width of tentacular pedalia 



Length of rhopalar pedalia 



Width of rhopalar pedalia 



Length of marginal lappets 



Length of tentacles 



Diameter to outer edge of ring-muscle of subumbrella . 



Width of subumbrella ring-muscle 



Diameter across zone of gonads 



Dimensions of each gonad ( circumferential Xradial)... 



Diameter of central stomach 



Length of manubrium 



Forma 

 A . wyvillei 

 approach- 

 ing the 

 condition 



of .4. 

 alexandri.^ 



(?) 



19 

 73 

 5.5 



47 



I A. wyvillei 

 Typical A . approach- 

 wyvillei? ' ing A . 

 ! alexandri? 



A . wyvillei 

 approaching 

 A . alexandri.* 



{°) 



13 



48 

 3 



28.5 

 7X5 

 21 



68 



23 



45.5 

 (') 



5.75 

 6.75 

 6.75 

 5.25 



14 



56.5 

 4 



38 



( 9 ) 



24 



91 

 19 

 29 

 54 



9.5 



8.25 



7.5 



6.25 



5.75 



44 



8 

 25 

 25 

 ( 8 ) 



4 



6 



4.5 



3.5 



3 



37 



1 D 5652, Dec. 17, 190:), Gulf of Boni, depth 525 fathoms, near Lamulu. 



« D. 4201, Apr. 10, 1908, south end of Leyte Island, depth 554 fathoms. 



s D. 5631, Dec. 2, 1900, south of Pariente Strait, depth 809 fathoms. 



< D 5471, June 19, 1909, off Sialet Point Light, east coast of Luzon, 568 fathoms. 



5 Notched with about 5 more or less distinct radial furrows. 



6 Notched with 22 radial furrows. 



7 Only slightly wavy in places, no distinct notches. 

 8 Faintly wavy in outline, no furrows. 



» Spherical. 



