(i()l MHDUS.E OF THK WORLD. 



upon the exumbrella and 9 double lappets per octant, 144 in all. In Antipa's specimens from 

 the Gull of Smyrna, Mediterranean, the radial furrows had increased to be 144 and thus 

 corresponded in number with the lappets. Haeckel's specimens had only 80 terminal gastric- 

 canals, while Antipa's specimens had 144. 



The following is a description of Antipa's specimens, these being the more mature: 

 Bell flatly rounded, shield-shaped, 500 to 1,000 mm. wide, 144 radial furrows on the 

 exumbrella, and between them 144 marginal lappets. 8 marginal sense-organs in deep niches. 

 4 perradial, veil-like oral palps, each ending in 2 points, and thus (he palps have 8 adradial 

 points. These palps are more than 1.5 times as long as the disk-radius and their outer edges 

 are complexly folded. The numerous tentacles arise from the middle zone of the subumbrella, 

 halfway between the center and margin line, and are 3 to 6 times as long as diameter ot the bell. 

 There are 4 interradial protruding horseshoe-shaped gonads. Mouth-opening wide. Wall 

 of mouth-tube thickened at 8 subradial places. The 1(1 stomach- pouches terminate in 144 

 dichotomous ramuli ( 128 tentacular and 16 ocular). Color reddish-white (pink ?). Gulf ot 

 Smyrna, coast of Asia Minor, Mediterranean; Trieste, Adriatic Sea, GraefFe; Straits of 

 Gibraltar ( ?) Haeckel. 



Drymonema gorge F. Muller. 

 Dr\rnonema Qorgo, MULLER, F., 1883, Zool. Anzeiger, Jahrg. 6, p. 220. 



The disk is 20 to 500 (usually 300) mm. wide. "Mouth-arms" or palps longer than 

 diameter of umbrella, whereas they are only about halt as long as this in D. dalmatina. The 

 8 ocular stomach-pouches fork once, thus giving 16 marginal diverticula as in D. dalmatina. 

 The 8 velar stomach-pouches branch dichotomously 4 times, as in the mature D. dalmatina, 

 but the fifth, sixth, eleventh, and twelfth branches in D. gorge* branch dichotomously a fifth 

 time, and thus each of the 8 ocular stomach-pouches gives rise to 20 terminal branches in 

 the lappets. There are thus 8X20+16=176 dichotomous terminal gastrovascular canals in 

 D. gorgo and only 8X 16+16=144 in D. Jalmatina. 



Found at St. Catharina Island, coast of Brazil. Rare. 



This may prove to be a variety of /). J,ilmatina. 



Genus (?) PATERA Lesson, 1843; DONACOSTOMA L. Agassiz, 1862. 



Ptitcra, LFSSON, 184}, Hist. Zooph. Acalephe^, p. ;22. HAECKEL, 1880, Syst. der Medusen, p. ^;;. 



( ?) Me/HJ/Hfl, HAECKEL, iSSo,loc.cit.. p. 534; 1881, Report Deep-sea Medus;c Challengri Expedition, Zool., vol. 4, p. i (abandoned 



by Haeckel himself). 

 (?) Donacostoma, Agassiz, L., 1862, Cont. Nat. Hist. U. S., vol. 4, pp. IlS, 163. 



The type species of this problematic genus is Patera cerebnformis, first described as 

 Dianaa cerebnformis by Lesson, 1829, Voyage de la Cof/iiill,-, Zooph., p. 124. planche to. 

 The description and figure are evidently so inaccurate as to be all but worthless. Dianiza, 

 Lamarck, 1816 (Hist. Anim. sans Vert., tome 2, p. 504), is a synonym of Cier \oniu. 



GENERIC CHARACTERS. 



Cyaneidae which are said to have 16 rhopalia. 16 clusters of tentacles arise from the 

 subumbrella alternating in position with the sense-organs. Agassiz's Donacostoma has only 

 8 rhopalia, but 16 rows of tentacles. 



Put era eereln-ij'irinis is said to come from near the Cape Verde Islands, tropical Atlantic; 

 and another species Donacostoma icooJn L. Agassiz, 1862 (Cont. Nat. Hist. U. S., vol. 4, pp. 

 118, 163), is from the China Sea, and is said to have 8 "eyes," but with 16 branches ot 

 tentacles like Patera, arranged in a single row in each lobe. Neither is well enough known 

 to be worthy of description here, and indeed it is possible that both belong to the genus Dr\- 

 moncma or even to Cyanca itself. 



Family ULMARIDvE Haeckel, 1880, sens. ampl. 



Flosculi.Lr+l'lmntiiLr, HAECKEL, 1880, Syst. der Medusen, pp. 5^, ;;<> 

 I'lmnii.l.r, VANHOFFEN, 1906, Nordisches Plankton, Nr. ll, p. 56. 



FAMILY CHARACTERS. 



Semaeostomeae with simple or branched radial-canals and a ring-canal. With hollow 

 tentacles. 4 interradial gonads. 4 mouth-arms with folded, curtain-like margins. 



