52 AMERICAN HYDKOIDS. 



a length of as much as 3 mm. but usually much shorter, with a number of distinct annulations 

 in distal end and also at base, the intervening portion being smooth. The hydrotheca is rather 

 slender, sometimes almost tubular, narrowing gradually at its proximal end and with the margin 

 armed with 7 to 12 very deeply cut, strong teeth which are acuminate and well defined. The 

 diaphragm is quite near the bottom of .the hydrotheca and is thin but evident without sectioning. 

 The hydrotheca is usually J to f as long as the pedicel. 



Gonosome.. — Gonangia almost cylindrical with a truncated top and base tapering to a short 

 stout peduncle. Gonangial walls deeply and evenly corrugated much as in Clytia johnstoni. 

 The gonangial contents are not well defined, but the gonophores appear to bear sporosacs. 



Distribution. — Type-locality, 10 miles north of Sablos Islaiid, West Indies, Great Bahama 

 Banks, on seaweed (S. U. I. Bahama Exped.); Cape Eomanos, Florida. 



The character on which Clarke based his specific name, spherical swellings on edge of 

 aperture leading from hydrotheca to stem, is one that is apt to be inconstant. 



CAMPANULARIA FUSIFORMIS Clark. 



Plate 10, fig. 5. 



Campanularia fusiformis Clark, Hydroids of the Pacific Coast, 1876, p. 254. 

 Campanularia fusiformis Tokrey, Hydroida of the Pacific Coast, 1902, p. 52. 

 Campanularia fusif amis Fraser, West Coast Hydroids, 1911, p. 30. 



TropTiosome.^ — Colony in the form of a creeping rootstock growing on a colony of Bimeria. 

 Rootstock much shorter than the pedicels and tortuous but not regularly annulated, except 

 where it projects in long tendriUike processes beyond the supporting body; in which case it is 

 closely and regularly annulated. Pedicels usually annulated throughout, the annulations 

 being ordinarily very regular and the pedicel ending in a spherical annulation just below the 

 hydrotheca. A typical pedicel and hydrotheca together measure 2 mm. in length. Hydro- 

 theca rather slender, sometimes approaching a tubular shape, with parallel sides. The margin 

 is armed with usually 12 rather blunt, rounded teeth. Not infrequently, however, specimens 

 on the same colony will in some cases have well-marked teeth and in others the margin will be 

 perfectly smooth. In the latter case it sometimes seems as if a toothed margin had been made 

 smooth by the filling in of perisarc between the teeth but in other hydrothecse there is a per- 

 fectly smooth rim with no such appearance. The diaphragm is of the ordmary type for this 

 genus. 



Gonosome. — The gonangia are typically fusiform or oval in general outline with the distal 

 ends produced into a more or less pronounced tubular, sometimes curved, neck with a round 

 ter min al aperture. Proximally they are abruptly rounded and supported on a short pedicel. 

 The length of a typical gonangium is 1.4 mm. and the gonangial contents appear to be sporosacs. 



Distribution. — Type-locality, Vancouver Island; also reported from Bay of Monterey, Cali- 

 fornia, by Doctor C. W. Anderson, and from Dillons's, California, and Point Reyes, California, 

 by Torrey. 



This species, as Torrey mentions, is closely related to C. urceolata, differing mainly in the 

 smaller and much more slender hydrothecse. None of the hydrothecse show the typical urceo- 

 late form of that species. The shape of the gonangium, especially the tubular neck, indicates 

 that this species is a Campanularia. 



? CAMPANULARIA LENNOXENSIS Jaderholm. 



Plate 10, figs. 6-7. 

 Campanularia lennoxensis Jaderholm, Aussereuropaische Hydroiden, 1903, p. 268. 



The writer has not seen this species and therefore contents himself with the following 

 free and somewhat condensed translation from the original description as given by Jaderholm : 



A very small species. Hydrorhiza creeping, thin and irregularly branched, .12 to .14 mm. in diameter. From 

 this spring the short upright unbranched pedicels which are from .29 to .43 mm. long and are more or less distinctly 



' Description of specimen received from Doctor Torrey, collected at Dillons, California, July 7, 1898. 



