KlirZnsToM.l-: -Til "is A NnSToMA, I.OKIFKKA. (i<>:; 



slightly and then continues throughout the greater part of its length of nearly uniform width, 

 ending m a bl unt, distal extremity, covered with frilled mouths. The wings are thin, longi- 

 tudinal lamelhe, one- being inward 'axial) and two flaring outward i lateral i. The 2 laui.il 

 wings give rise each to short, small, secondary wings near their upper, outermost end. In tin- 

 upper third ot the lower arm the trilled mouths are developed upon the outer sides as will as 

 along the edges of the 3 wings. In the middle third they are confined to the edges of the 3 

 wings; and in the lower (distal) third, they are developed upon the sides and edges as in the 

 upper third of the arm. Thus in the proximal and the distal thirds of the lower arms the 

 mouths recall the condition seen in the mouth-arms of Mastigiai and Crainhirjnc. Then- 

 are neither terminal knobs nor other appendages upon the mouth-arms, but there are 

 numerous short, slender, filiform, tubular appendages upon the arm-disk. 



The arm-disk is quadrangular with rounded angles, with its sides about three-eighths as 

 long as the bell-diameter. The subgenual ostia are large and gaping, 4 times as \\ide as the 

 perradial columns of the disk, and are not narrowed by median flaps. There is a single, lame. 

 but low, subgenital porncus. 



There are only ring-muscles in the subumbrella. These are strongest near the margin 

 and the muscle-mass is widest in the 4 interradn. The muscles are onlv partially intei- 

 rupted in the 8 principal radii. The canal-system ot the subumbrella is characterized In the 

 considerable width of the 8 rhopalar canals, which are somewhat wider than the otlu-is. The 

 ring-canal is at some distance inward from the bell-margin and the anastomozing network of 

 vessels extends on both sides of the ring-canal, fusing with the 8 radial-canals and with the 

 central stomach. 4 canals arise from the perradial sides of the cruciform stomach and extend 

 downward through the 4 pillars into the arm-disk. Here each canal divides into 4 blanches, 

 2 horizontal ones leading into the center of the arm-disk and 2 vertical leading down into 2 of 

 the oral arms. Each arm-canal gives off 3 side branches which together with the axial-canal 

 extend down the mouth-arms, the side branches giving off branchlets to the 3 rows of mouths. 



This medusa is found in the Malay Archipelago, from Amboina, Philippines, and Moluc- 

 cas to Japan. It is described in detail by Haeckel, L. S. Schultze, and Kishim>uu-. The 

 exumbrella is violet or mauve colored at its center, grading into russet at its margin. Sub- 

 umbrella flesh-colored. Gonads and mouth russet or hazel-brown. Mouth-arms and arm- 

 disk violet. 



Kishinouye's T hysanostoma denser is pum, from Japan, is, I believe, onh the \oun of 

 T. thysanura. Lesson's Rfiisostoma brachyura, from New Guinea, has a whitish bell with 

 rusty-colored margin and yellowish-red mouth-frills, the general color pattern being MM 

 similar to that of the more highly colored (apane.se medusa. 



The dimensions in mm. ot a specimen obtained at Mindanao, Philippine Islands, by 

 the U. S. Bureau of Fisheries steamer Albatross are as follows: Uell, 100 wide; perradial 

 diameter of arm-disk, 74; diameter of arm-disk at level of origin of mouth-arms, 4^; mmt.ii 

 ostium, 40 wide; mouth-arms, 22O long, 24 \vide at widest part, 12 wide at their blunt tips; 

 8 to 12 velar lappets in each octant; filamentary appendages on the arm-disk, 10 to 15 long; 

 exumbrella finely granular. 



In another large medusa from Mausalay, Mindoro, Philippine Islands, taken by the 

 Albatross on June 4, 1908, from a depth of 150 feet, the bell is 120 mm. wide and the mouth- 

 arms IQO long. In a half-grown medusa obtained on the surface at the same time and place 

 the bell is 59 mm. wide with finely granular exumbrella. Mouth-arms 6~ long. Arm-disk 

 41 mm. wide at its origin from the subumbrella and \\ mm. wide at the level of the origins 

 of the mouth-arms. 



Genus LORIFERA Haeckel, 1880. 



Himaniosioma, A<,ASSIZ, L. t 1862, Cont. Nat. Hist. U. S., vol. 4, p. 152. HAECKEL, 1880, V. i uscn, p. 627. \ ',-.- 



HiiFFF.N, 1888, Bibliotheca Zoologica, Bd. i, Heft. 3, p. 45. MAAS, 1903, Scyphomcduscn dcr Siboga E\ 1 



pp. 77, 81. 



Lorifera, HAF.CKFI., 1880, Ibitl., p. 628. 



The type species is L. lorifera ot the Indo-Pactfic region. This genus is distinguished from 

 the closely allied T hysanostoma only by the naked, club-shaped extremities of iis mouth-arms. 



The name Himantostoma is preoccupied, baxms; been used by Loew, 1853, lor Diptei.i. 

 \\ e must therefore use Haeckel's alternative name Lorifera. 



