NO. 1 fraser: hydroids 57 



Aglaophenia praecisa, new species 

 Plate 13, Fig. 64 



Trophosoine. — Colony small, 12 mm. high, divided into regular 

 internodes, each of which bears a hydrocladium. Hydrocladia nearly in 

 the same plane, given off almost at right angles to the stem. Hydro- 

 thecae closely approximated ; Margin with 9 teeth, the median sharp, 

 retrorse, but not very markedly so; the first, second, and third pairs, 

 rounded and nearly equal; the fourth pair more slender and sharper. 

 The widest angle lies between the first and second teeth on each side, 

 and the most acute between the median tooth and the first pair. Intra- 

 thecal ridges present but not strongly marked; lateral nematophores 

 reaching above the margin of the hydrotheca; median nematophore short, 

 not reaching nearly to the margin of the hydrotheca; the three nemato- 

 phores on each cauline internode similarly tubular. 



Gonosome. — Not observed. 



Distribution. — Santa Maria Bay, 10 fathoms. 



Aglaophenia rigida Allman 



Aglaophenia rigida Allman, Hyd. Gulf Stream, 1877, p. 43. 



Fraser, Beaufort Hyd., 1912, p. 378. 



Distribution. — Off White Friars, 25 fathoms; Isabel Island, 10- 

 25 fathoms; Santa Maria Bay, 10 fathoms and 35-40 fathoms. 



Genus ANTENNELLA 

 Antennella avalonia Torrey 



Antennella avalonia Torrey, Hyd. Pac. Coast, 1902, p. 74. 



Distribution. — East of islands off Navidad Head, 25-35 fathoms. 



Antennella compacta, new species 

 Plate 13, Fig. 65 



Trophosome. — Colony small, 6 or 7 mm. ; one or two proximal 

 internodes, long and without hydrothecae, have a varying number of 

 nematophores; the remainder of the hydrocladium is divided into alter- 

 nating hydrothecate and nonhydrothecate internodes; the hydrothecate 

 internode, with a transverse node proximally and an oblique node dis- 



