THE CAMPANULAEID.E AND THE BONNEVIELLID^. 67 



ORTHOPYXIS CRENATA (Hartlaub). 



Plate 16, figs. 3-5. 



Eucopella crenata Hartlaub, Hydroiden aus dem Stillen Ocean, 1901, p. 364. 



1 EucoTpella crenata Hartlaub, Die Hydroiden der magalhaensischen Region imd chilenischen Kiiste, 1905, p. 568. 



"? Eucopella crenata Billakd, Travailleur et Talisman, Hydroides, 1907, p. 176. 



A specimen sent me by Doctor Hartlaub and labeled "Eucopella crenata P. Pantalon" 

 does not agree with the origiaal description,' in that the hydi-anth is smaller than the hydro- 

 theca and completely retracted withm it. The foUowmg description is a translation of that 

 given by Hartlaub : 



Hydrorhiza forming a moderately broad network. Hydranths (pedicels?) scattered, unbranched, up to 5 mm. 

 high. Pedicels moderately thick, very variable in length, partly smooth, partly obliquely annulated, always with a 

 globular constriction below the hydrotheca. Hydrothecee very variable in size, in the thickening of their walls and 

 n form. Their margin is usually plainly toothed (about 12-14 teeth). Hydrothecal walls partly or completely thick- 

 ened, with the exception of their distal end, which is bent outward and very thin- walled. The hydranths are some- 

 times much larger than the hydrotheca and then are but partially retractile. Gonangia large, strongly compressed 

 with a wide rounded end, thick- walled with a sinuous surface, with a short smooth pedicel springing from the hydrorhiza, 

 containing two well developed medusae with easily recognizable mature sex-cells. 



Distribution. — Hartlaub thinks that this species is identical with a form described as a 

 " Campanularia allied to 0. caliculata" from New Zealand, by Coughtry,^ and also another form 

 described by the same writer as "Campanularia allied to C. integra," also from New Zealand.^ It 

 hardly seems likely to the present Avriter that the form E. crenata is identical with C. caliculata 

 var. malcrogona Lendenfeld, as suggested by Hartlaub.^ 



It appears then likely that the distribution includes New Zealand, the type-locality being 

 Eangitoto Island and Terra del Fuego (Hartlaub). This species is doubtless close to E. everta 

 (Clark) and may be identical with it. The hydrothecse of the latter species is much larger than 

 those of 0. crenata, as a comparison with a slide from Hartlaub shows. 



Bathymetric distribution, 1 to 7 fathoms. 



ORTHOPYXIS EVERTA (Clark). 



Plate 16, figs. 6-8. 



Campanularia everta Clark,- Trans. Conn. Acad., 1876, vol. 3, p. 253. 

 Campanularia everta Torrey, Hydroida of the Pacific Coast, 1902, p. 51. 

 Campanularia everta Torrey, Hydroids of the San Diego Region, 1904, p. 12. 

 Campanularia everta Hickson and Gravely, National Antarctic Exped., 1907, p. 24. 

 Campanularia everta Fraser, West Coast Hydroids, 1911, p. 37. 



TrophosomeJ' — Colony growing over a laminarian in the form of a creeping rootstock which 

 forms a reticulate pattern. Pedicels unbranched, sometimes attaining a height of 5 mm. They 

 vary greatly in extent of annulation, some being almost smooth and others closely annulated 

 throughout, but always show the spherical annulation below the hydrotheca. Both the root- 

 stocks and pedicels have their periderm greatly thickened. Hydrothecse exceedingly variable, 

 as Doctor Torrey" has said: "The rim of the hydro thecse may or may not be everted. It is 

 usually but not always crenate. The wall of the hydrotheca may be very thick or very thin, 

 and is either straight or convex in profile." Except for the frequent occurrence of a regularly 

 dentated margin, the hydro thecas can not be distinguished from that of 0. compressa and might 

 readily be mistaken for that species. 



' "Der Kopf des hydranthen manchmal viel grosser als den Kelch und dann nur theilweise in denselben zuriick- 

 ziehbar." Hydroiden aus dem Stillen Ocean, 1901, p. 365. 



2 Ann. Mag. Nat. Hist., ser. 4, vol. 17, 1876, p. 25. 



3 Trans. New Zealand Institute, vol. 7, 1875, p. 292. 



^ See Some new and rare Hydroids in the AustraUan Museum, by W. M. Bale, 1888, p. 755. 

 '' Description of specimen from Dr. H. B. Torrey, labeled "Monterey, CaHf." 

 ''Hydroida of the Pacific Coast, 1902, p. 51. 



