STAUROMEDUS.^i: — LUCERNAKIA. 529 



ugally outward, and tlie components ot each pair are separated one from another by the 

 4 interradial septa. The gastric filaments in the regions of the gonads are small but very 

 numerous. 



This form is found on the I.abrador coast. A good description of it is given liy Ilaeckei, 

 1880. It is certainly closely related to, if not identical with L. quaJricornis, but Haeckel states 

 that the peduncle is separated from the bell by a pyloric stricture, or ring-furrow, which is 

 not the case in L. quadricornis. Haeckel studied only preserved specimens and I strongly sus- 

 pect that this so-called p\loric constriction may have been caused by unnatural contraction. 



Lucernaria walteri Antipa. 

 Lucernosa waiter!, Antipa, 1892, Zoolog. Jahrb., Abth. Syst., BJ. 6, p. 379, taf. 17, fign. 1-9. 



150 to 160 mm. high and 55 to 60 mm. across the bell. Bell goblet-shaped; stalk round, 

 single-chambered, somewhat higher than the bell. Stalk with 4 well-developed, linear, inter- 

 radial, longitudinal muscles. 8 arms arranged in pairs with the 4 perradial concavities between 

 the arms twice as wide at the 4 interradial notches of the margin. Each arm with a terminal, 

 ball-like cluster of 700 to 750 short, knobbed tentacles. 8 wide, lancet-shaped, adradial 

 gonads, e.xtending to ends of the 8 arms; they are folded, band-like, and lie in the subumbrella 

 wall of the perradial stomach-pouches. The cavity of the stalk e.vtends directly into that of 

 the bell, without a pyloric stricture. Color light brown. East Spitzbergen, Arctic Ocean. 

 This is one of the largest known Lucernarians. Special description given by Antipa. 



Lucernaria kiikenthali Antipa. 



Lucernosa kukenlhali, .i^ntipa, 1892, Zoolog. Jahrb., Abth. Syst., Bd. 6, p. 386, taf. iS, fign. 10, 11. 



More than 150 to 160 mm. high, 55 to 60 mm. wide across the bell. Bell goblet-shaped, 

 somewhat higher than wide. Stalk not quite as long as the bell itself, with no constriction 

 or other sharp distinction between stalk and bell. Stalk round, single-chambered, with 4 

 well-developed, linear, longitudinal muscles. 8 arms arranged in pairs. The 4 perradial 

 notches of the bell-margin are 3 times as wide and 3 times as deep as are the interradial. Each 

 arm has a terminal, ball-like cluster of 800 to 850 short, knobbed tentacles. Gonads are 8 

 small, lancet-shaped, cross-folded bands extending to ends of the 8 arms. Color ( ?) East 

 Spitzbergen, Arctic Ocean. Described in detail by Antipa, 1892. I am inclined to suspect 

 that this is only a variety of, if not identical with, Lucernaria ivaltcri. It appears to be dis- 

 tinguished only by its narrow lanceolate gonads and slightly wider perradial notches. 



Lucernaria haeckeli Antipa. 

 Lucernosa haeckeli, Antipa, 1892, Zoolog. Jahrb., Abth. Syst., Bd. 6, p. 388, taf. 18, fign. 12-14. 



60 to 65 mm. high and 27 mm. wide at widest part, which is below bell-margin. Bell 

 oval, goblet-shaped, widest near middle. Stalk conical, wide, and hardly one-third as long 

 as bell. Stalk single-chambered with 4 interradial, longitudinal muscles. 8 short arms 

 arranged in pairs. The 4 perradial notches of the margin only a little wider and deeper than 

 the 4 interradial notches. Each arm terminates in a ball-like cluster of 80 to 90 knobbed 

 tentacles. 8 very wide gonads, so wide that they overlap one another. The gonads extend 

 not quite to bases of arms, and quite fill the lower parts of the radial chambers of bell. 



This species is distinguished from L. hathyphila by its shoit bell-stalk and the position 

 and shape of its gonads. Color ( I) East Spitzbergen, Arctic Ocean. 



Lucernaria infundibulum Haeckel. 



Lucernaria injundihulum, Haeckel, 1880, Syst. der Medusen, pp. 392, 385. 



Bell funnel-shaped, flat, not quite twice as wide as high, 24 mm. wide. Peduncle some- 

 what less than 10 mm. long, 4-sided, pyramidal, and single-chambered. The medusa is 

 distinguished by having 4 hollow, interradial taeniolae each with a funnel-like, central cavity 

 extending to lower end of peduncle, recalling the condition seen in the aboral end of bell in 

 Periphylla. Each hollow septum bears along the entire length of its side walls a pair of well- 

 developed longitudinal muscles and 2 rows of gastric filaments. The 8 umbrella-arms are 

 arranged in 4 pairs, the 4 perradial notches being wider than the 4 interradial. Each arm has 



