STAUROMEDUS^ — CRATERLOPHUS, CAPIUA, LIPKKA. 539 



The stalk ot C. inacroscystis is two-thiids as long as the hell, whereas in (^. tethys it is 

 only one-touith to one-third of this length. In other respects it resembles the very closely 

 allied C. tethys with which it may prove to be identical. 



Genus CAPRIA Antipa, 1893. 



Capriti, Antipa, 1893, Mitth. Zoul. Sta. Kcaprl, BJ. 10, p. 628. 



The t\ pe species is Capna sturdzii Antipa, from the Island of Capri, Hay of Naples, Italy. 



GENERIC CHARACTERS. 



Stauioniedus;e with 8 adradial, lappet-like arms which lack knobbed tentacles, but are 

 each provided with a row of short, webbed, tooth-like or finger-shaped tentacles. Wart-like 

 clusters of nematocysts on subumbrella side of each of the 8 arms. No perradial or inter- 

 radial tentacles or "anchors." The circular muscle of the subumbrella is entire, not divided 

 into 8 isolated marginal muscles. The radial-muscle is funnel-shaped and spreads over the 

 entire surface ot the subumbrella. The 4 septal edges of the perradial stomach-pouches 

 extend nearly to the bell-margin, where they are pierced by the ring-canal. There is a long 

 throat-tube, 8 adradial gonads, and an aboral stalk to the bell serving for attachment. 



The genus Capria is the only representative of the family Capriids of Antipa, 1893, 

 which may be defined as Stauromedusae with 8 adradial arms which lack knobbed tentacles, 

 but have each a row of rudimentary tentacles joined by a web, one to the other. No anchors. 

 Ring-muscles of the subumbrella entire, not separated into 8 isolated sectors. Longitudinal 

 muscles equally developed over the entire subumbrella. Bell provided with an aboral stalk 

 for attachment. Stomach with 4 simple, perradial pouches as in Eleutherocarpidae. 



Capria sturdzii Antipa. 

 Capria sturdzii, Antifa, 1893, Mitth. Zool. Sta. Ncapel, Bd. 10, p. 168, taf. 40, fign. 1-18. 



Body 9 mm. long and 5.5 to 6 mm. wide; globular with a short, broad basal stalk or 

 peduncle about as long as the bell-portion itself. Basal plate of peduncle or stalk of bell 

 broad and flat and single-chambered, resembling a suctorial disk. There appear to be 

 normally 8 short, thick, adradial, paddle-like arms, although the single specimen found had 

 10 arms; these are hollow and devoid of knobbed tentacles, but are provided with a row of 

 16 to 20 tooth-like, or short finger-shaped, rudimentary tentacles which are fused one to 

 another by a web, thus giving the appearance of a multi-toed, bird-like web-foot. There 

 are 5 to 8 large clusters of nematocysts on the subumbrella side of each of the 8 arms. 

 There are no "anchors" or suctorial tentacles, but the spaces around the bell-margin between 

 the 8 arms are open and somewhat less in width than are the arms themselves. The circular 

 muscle of the subumbrella is entire, not cut into 8 isolated muscles, as in certain other 

 Stauromedusae. There are 4 rows of gastric filaments along the 4 interradial taeniolas from 

 the middle of the central stomach nearly to the foot-plate. Mouth-tube long, prismatic, 

 4-sided, with 4 interradial, longitudinal furrows. Mouth-opening cruciform and quadratic. 

 8 band-shaped gonads, above (aboral in reference to) the taeniolae. Color )'ellowish-white. 



Found attached to a Serpnia tube dredged from a depth of 40 fathoms near the Blue 

 Grotto, Island of Capri, Bay of Naples. It is described in detail by Antipa. 



Genus LIPKEA Vogt, 1886. 



Lipkea, Vogt, 1886, .Archiv. Sci. Phys. ct Nat. Geneve, ser. 3, tome 16, p. 356. 



The type species is Ltpkea ritspoUana Vogt, from the coast of Sardinia, Mediterranean. 



GENERIC CHARACTERS. 



Stauromedusae with 8 hollow (4 perradial and 4 interradial) arms. With a continuous 

 circular muscle. Neither tentacles nor "anchors." There are well-developed mucous glands 

 upon the subumbrella. The bell is attached by a sucker. 



