HYDROIDS OF BEAUFORT, NORTH CAROLINA. 



383 



Genus SCHIZOTRICHA. 



Trophosome. — Colony simple, branched, with hydrocladia pinnately arranged. • 



Gonosome. — Gonangia springing from the stem, branch or hydrocladium, not directly protected. 



Schizotricha tenella (Verrill). 



Ptumularia temella Verrill, Invert. An. Vineyard Sound, 1874, p. 



731- 



Sckizotricka UntUa Nutting, American Hydroids, pt. 1, 1900, p. 80. 



Trophosome. — Colonies usually growing in clusters, 

 reaching a height of 2 inches but usually much less than 

 that in the Beaufort specimens; stems dichotomously 

 branched; divided into intemodes, each alternate one 

 bearing a hydrocladium and a hydrotheca; hydrocladia 

 slender, often branched, divided into three kinds of 

 intemodes, the one following tlie other in regular succes- 

 sion, the first a short intemode without any nematophore 

 and with a transverse node at its distal end, the second 

 somewhat longer, with one or two nematophores and with 

 an oblique node at its distal end, the third about the same 

 length as the second or longer, bearing a hydrotheca, with 

 two supracalycine nematophores and a nematophore below 

 the hydrotheca; hydrotheca cup-shaped to cylindrical, 

 with about one-half of the distal end free. There are two 

 or more nematophores on each of tlie stem intemodes. 



Gonosome.— Gonangia appearing at the base of the hydrothecae, curved-comucopia-shaped, with 

 three or four nematophores not f.ar from the base. 



Distribution. — Ratlicr common in water about 10 feet deep in Bogue Sound and North River; found 

 also on the piles at Marshallberg. 



Fig. 52.— SdMao/ricAo tmella (Verrill). A, portion of 

 colony showing gonangium; B, portion of hydro- 

 cladium, more higtily magnified. 



