STU i.'fiMi-.iii s i-; STI NO8< 1 Nil S. 



525 



'.I M'RIC CHARACTFRS. 



Stauromedusae with simple, undcft hell-margin without adradial lobes. With 8 (or 12 : i 

 perradial and imei -radial nundinal "anchors," S (or I 2 ": I adradial clusters of knobbed tentacles. 

 \\ith a ring-shaped, entire, coronal muscle. Stalk of attachment is 4 (or 6?) chambered. 

 Stomach 4-chambered as in the Eleutherocarpidae. Gunads interradial or on both sides of 

 the interradii. 



Kishinouye would constitute for S. innlnn a ne\\ famil\-.the Sti IIHM \ phidx, which would 

 he intermediate hei\\ei-n I laeckel's Tcssciid;i- and Lucernarida-. S. in<i/>,ii has a 4-chambered 

 stalk and 8 separate, adradial gonads. 



Broch, 1907, describes a medusa which may belong to tin- genus S/,n'ji,-\f>lius but which 

 has 12(6 perradial and 6 interradial) marginal anchors and 12 adradial clusters of tentacles. 

 1 he mouth is 6-rayed instead of 4-rayed, as in X. inabai. A \ariation in the number of ra\s 

 may be expected in these degenerate medusas and it seems inexpedient at present to sepa- 

 rate the 6-rayed from the 4-rayed form. 



Stenoscyphus inabai Kishinouye. 



Dtfastrum inahai, KIMIIMH-VI, iSij-,. /,n. .1 ., vul. ?, p. 411.. 



Stenoscyphus inabai, KISHINOL vi, l')O2, Journal College Science, Tokyo, vol. 17, art. 7, p. 2, plate I, figs. I, 2. 



About 25 mm. long, elongate, narrow, funnel-shaped, and quadratic in cross-section. 

 Stalk with 4 interradial grooves. Exumbrella smooth; subumhrella beset with large, urn- 

 shaped groups of nematocysts. The 8 principal tentacles are large, round, adhesi\e bodies 

 (anchors). Secondary tentacles are short and knobbed, and arranged in 8 adradial clusieis 

 of about 25 each. There are neither arms nor lobes to the subumbrella. The ring-like coronal 

 muscle is well developed and entire. 4 long, deep, interradial, gastrogenital pits extendin". 

 to the aboral end of the bell. 8 gonads, in form of 4 pairs of bands along the interradial 

 muscles. Each gonad composed of 40 sacs in 2 rows. 



Color dark brown flecked with white, anchors red, gonads bro\\n. 

 Subumbrella pale-green, manubrium \cllowisli. 



Kata-ura, Kii Province, and Misaki, Japan. In winter. Rare. 

 Attached to Sargassum. The animal can detach itself from the Sar- 

 ".assum "at will" and can crawl about, using its oral 

 and aboral adhesive organs, thus effecting a locomo- 

 tion resembling that of a leech. It can not swim by 

 pulsations of the bell. 



Stenoscyphus (?) hexaradiatus Broch. 



Sttnoscvphus (?) hexaradiatus, BROCH, 1907, Hydroidcn uml Metlusen, 

 Report Srn i in Arctic Eipcdition in the From, No. iz, 



p. 9, taf. 2, fij-n. 



Bell-shaped, with a cylindri- 

 cal peduncle sonu -\\hat longer 

 than height of bell. Bell about 

 (' mm. wide, total height of stalk 

 together with bell lomm. Throat- 

 tube short, 6-sidcd. Peduncle pro- 

 vided with 6 longitudinal muscles. 

 12 marginal anchors, 6 radial and 

 6 interradial. These are shaped 

 verj much as ordinary tentacles, 

 hut bent in the middle in a knee- 

 like form, and each provided with an abaxial cushion. Tentacle-clusters arranged in 12 adradial 

 groups, each composed of 7 to 10 tentacles which arise in several rows from the bell-margin. 

 Among each cluster of suctorial tentacles there are one or more tentacles which resemble the 

 marginal anchors. 6 horse-shoe-shaped, folded gonads with their con\e\ sides abaxial. The 

 two wings of each horse-shoe do not extend to the circular muscle. Color 



334 



I'n.. -,-,4. Stcnoseyphus inabia, after Kishimiuve, in Jcmr. College <! 



Tokyo, Japan. 

 Fie. 335. Steno.<c\phu! hexaradialut, after Broch, in Report of the Second 



Nonvr^ian Arctic F.xpi-Jition in the "I''rarrt." 



