.' OJB 1 Till WOOD.S HOLE UKGIOJT. 



CLAVA, 



327 



Tropltnxnmf. Ilydranths single, with slender basal portions ami terete hod it's. Filiform tentacles, 

 about 20 to 30 in number, pcam-red over the body and proboscis. 



Qtmofome. Gonophores home in clusters Immediately below the basal tentacles. 



Clava leptostyla Agassi/. Fig. 1 . 

 (Contribution-; to tlir Natural History of Die United States, 1862, iv, p. 218.) 



Trophosnmi'. llydranths with a slender proximal portion and a long distal proboscis; tentacles 

 more than 20 in full-grown specimens, hydrorhiza forming a closely aggregated ineshwork of con- 

 tiguous tubes. 



Gmiosome. Gonophores borne below the proximal tentacles in compact clusters, which may 

 encircle the hydranths or be nnsvinmetrically collected on one side. 



Color. Brick-red. 



Distribution. Has been found on the rocks near the Hole, where it occurs in patches under the 

 seaweed. I have also found it attached to the piles of the old guano wharf. 



Under the head of "distribution," localities are given where the species have been found in the 

 Woods Hole region. 



2. Carili/lapham laauitris Alltnan. 



CORDYLOPHORA. 



Trophosome. Colony regularly branched. Hydranths with scattered filiform tentacles. 

 Qonosome. Gonophores borne on the branches, ovate, inclosed in a chitinous investment which 

 resembles a gonangium. 



Cordylophora lacustris Allman. Fig. 2. 



(Brit. Assoc. Rep., 1843.) 



Trophnsomi'. Colony regularly branched, attaining a height of about three-fourths inch. Main 

 stem not fascicled, straight, giving off alternate branches, which in turn often give off alternate branch- 



