vol. 1.] Torrey. — Hydroida of the Pacific Coast. 69 



Sertularia greenei Murray. 



Sertularia tricuspidata, Murray, Ann. N. H., 1860, p. 250. 

 Sertularia greenei, Murray, ibid, p. 504. 

 CotuUna greenei, A. Agassiz, 111. Cat., 1865, p. 147. 

 Sertularia greenei, Clark, Trans. Conn. Ac, 1876, III, p. 257. 



Distribution. Navarro, Cal. Vancouver I. to Santa Barbara, 

 Cal. (Clark). San Francisco, Cal. (Agassiz). 



Sertularia incongrua, sp. nov. 



PI. IX. Figs. 81, 82. 



Trophosome. Stems long, sub-cylindrical. Branches pinnately arranged, 

 alternate, longest less than 15 mm. in length. Both stem and branches 

 without nodal septa. Hydrothecae on stem in two rows, completely 

 immersed, alternate, three or five intervening between contiguous branches, 

 one being axillary; margin entire. Hydrothecae on branches similar to 

 those on stem, in two rows proximally, usually in three rows on distal halt 

 of each branch, spirally arranged. 



Gonosome absent. 



Distribution. San Pedro, Cal. 



The stem is slender, with heavy, brown perisarc. The collec- 

 tion contains fragments only, the longest of these being 130 mm. 

 in length. The branches are colorless, the perisarc being incon- 

 spicuous. The coenosarc is in poor condition, so that no data 

 concerning the hydranth can be given. 



The branches exhibit ;i transition from the Thuiaria to the 

 Selaginopsis type. I have thought it convenient to consider it 

 for the present a member of the former group. 



Sertularia traski, sp. nov. 



PI. IX. Fig. 83. 



Trophosome. Stems long, slender, divided transversely into internodes 

 of variable length, branching dichotomously once at the distal end. Other 

 branches pinnately arranged, alternate, three or five to each internode of 

 the stem, without nodal septa; borne by a narrow base on a short shoulder 

 process. Hydrothecae on stem well immersed, in two rows, alternate, three 

 between contiguous branches, one of which is axillary. Hydrothecae on 

 branches similar to those on stem, in two rows, alternate, the orifice of one 

 reaching the level of the base of the next distal one. Orifice small, without 

 teeth, semicircular, opereulate. 



Gonosome not present. 



Distribution. San Pedro, Cal. 



