*S'. F. Clafh — Ilydrokh of the Pacific CoaM. '251 



respects. It lias the same mode of growth, the same robust habit, 

 tlie same style and airangement of hydrothecse. There is quite a dif- 

 erence in the natural size figures of .S. ahietlna given by Uincks and 

 by Johnston. Our specimens from the New England coast agree very 

 well with Johnston's figure, which is just about twi(!e the size of 

 Hincks' H""ure. 



Sertularia argentea Ellis and Solander (Linn.) 



Three fine specimens of this widely distributed species have been 

 found at Santa Barbara, California ; they are in good condition and 

 loaded wdth gonothectB. The only characteristic which shows any 

 variation is the gonotheca?, which are proportionally a trifle longer 

 and also have the orifice a little larger than in our east coast speci- 

 mens. This slight difference being the only one and this character 

 varying considerably in the same specimen, I should not think of sep- 

 arating them. 



Santa Barbara, Cal., — INtrs. Ellwood Cooper. Height of largest 

 specimen, 160""". 



Sertularia Greenei Murray. 



Sertularia tricuspidata Murray, Ann. and Mag. for April, I860, p. 250, PI. XI, lig. 1. 



Sertularia Greenei Murray, Ann. and Mag., v, p. 504, 1860. 



Cotulina Greenei A. Aga.ssiz, Cat. of N. Amer. Acalepha?, 1865, p. 147. 



Plate XXXVIII, figure 6. 



Stems erect, slender, densely clustered, simple, thickly branched, 

 basal portion straight, above the first branch becoming slightly flex- 

 uous, forming a graceful arc between each two branches, color cor- 

 neous, usually darkest at the base ; joints placed at right angles to 

 the stem and very irregularly distributed, forming iuternodes which 

 bear from one to eight pairs of hydrothecEe ; branches alternate, erect, 

 many of them short; some of the lower ones equal in length to the 

 main stem and closely resembling it in every respect; others from 

 the middle portion of the stem are of a medium length aiul, like the 

 longest branches from the lower part of the stem, reach to the extrem- 

 ity of the main stem forming a corymb-like structure, Tlie branch- 

 lets, like the branches, are mostly short, but a few are of considerable 

 length, extending to the ends of the branches. Ilydrothecse sub-alter- 

 nate, tapering uniformly to the distal end, Avith oblique, toothed 

 apertures, which face toward the stem ; on the outer edge of the 

 aperture are two large, prominent teeth separated by a deep notch. 



Trans. Conn. Acad., Vol. III. 33 June, 187G. 



