42 AMERICAN HYDEOIDS. 



CAMPANULARIA SUBRDFA Jaderholm. 



Plate 5, figs. 2, 3. 



Campanulana subrufa Jaderholm, Mitteilungen ueber einige von den Schwedischen Antonktischen Bxped., 1901-03, 



cingesommelte Hydroiden, 1904, p. 5. 

 Campanulwia subrufa Jaderholm, Hydroiden aua antarktischen iind subantarktischen Meeren, 1905, p. 15. 



Trophosome} — Stem strongly polysiphonic. Branches irregularly disposed but mainly lateral 

 in position, the ultimate ones being monosiphonic, divided into regular internodes each of which 

 bears a hydrotheca on a strong process near its distal end. The liydrothecae rest immediately 

 upon this without any trace of a pedicel. Hydrothecse alternate in position large, 1 mm. in height, 

 deeply campanulate, although departing somewhat from the strict radial symmetry of most of 

 the genus. They resemble a clay pipe in fonn, having the outer abcauhne side more distinctly 

 convex than the adcauline side, and the proximal portions bent downward as it approaches the 

 stem. There is a distinct thickening of the hydrothecal wall on the abcauline side a short distance 

 above the bottom of the hydrotheca. The margin is even and does not show the impressed band 

 so characteristic of 0. marginata (Alhnan) . The run is often shghtly everted and there is no evi- 

 dent diaphragm. The hydranth has about 20 tentacles, and some hydranths in the specimen 

 described are sufficiently well preserved to show a trumpet-shaped hypostome on dissection. 



Gonosome. — Gonangia (female) 2.5 mm. high, obconical in shape with a broad truncated 

 distal end and narrowing gradually to the proximal end. The walls are ornamented with regular 

 sharply defined armulations. Gonangial contents, ova, thus showmg that the species belongs to 

 the genus Campanularia. 



Distribution. — Jaderholm reports tliis form from Ludwig PhiUp's Land, Seymour Island ; Shag 

 Rocks and north of Joinville Land; 104 to 160 meters. All of these localities are in the Antarctic. 



This species, having no diaphragm, goes with doubt into the family of Campanularidse. 

 The form of the proboscis, however, seems to the writer more important than the presence or 

 absence of the diaphragm, and hence he places it in the Campanularidse, and in the genus Cam- 

 ■panularia on account of its producing ova without the intervention of medusae. 



? CAMPANCXARIA MACROSCYPHA Allman. 



Plate 5, fig. 4. 

 Campanularia macroscypha Allman, Hydroids of the Gulf Stream, Mem. Mua. Comp. Zool., vol. 5, No'. 2, 1877, p. 11. 



TropJbosome.- — Colony composed of unbranched pedicels springing from a creeping root- 

 stock which forms a reticulate pattern on the surface of the stem of another hydroid. Hydro- 

 rhiza smooth, constricted where a branch springs from what appears to be the main stolon, other- 

 wise without annulations. Pedicels and hydrothecse together sometimes attaining a height of 

 11 mm., pedicels usually smooth, sometimes with irregular and distant annulations, always with 

 a small spherical annulation just below the hydrotheca. Hydrothecse large, sometimes attaining 

 a height of 2.3 mm., tubular, from two to three times as long as broad and having a margin with 

 twelve to fourteen very symmetrical clean-cut and evenly rounded teeth. Hydrothecal walls 

 moderately thick with a strong amiular thickening forming a circular shelf very near the bottom 

 of the hydrotheca. Below this shelf is a relatively minute basal chamber. Hydranth apparently 

 of the usual campanularian type with numerous (more than 20) tentacles. 



Gonosome . — Unknown . 



Distribution. — Type-locality, off Sand Key, Florida, 120 fathoms. Albatross station 2366, 

 lat. 22° 28' N.; long. 87° 2'W.; 27 fathoms. Albatross station 2410, lat. 26° 47' 30" N.; long. 

 83° 25' 15" W.; 28 fathoms. Albatross station 2664, lat. 29° 41' N.; long. 79° 55' W.; 373 

 fathoms. Albatross station 2669, lat. 31° 9' N.; long. 79° 33' 30" W.; 352 fathoms. Albatross 

 station 2672, lat. 31° 31' N.; long. 79° 05' W.; 277 fathoms. 



Bathymetrical distnbution. — 27 to 373 fathoms. 



' The description of the general form of the colony and the gonosome is adapted from the original description of 

 Jaderholm. The details of branches and hydrothecse are taken from a fragment kindly sent me by Doctor Jader- 

 holm labeled: "Graham region. Cape Seymour, Swedish Antarctic Expedition." 



2 Description of a specimen from station 2664, lat. 29° 41' N.; long. 79° 55' W., 373 fathoms. 



