234 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 4 



branches give rise to smaller secondary branches, none more than 1 cm 

 in length, sub-alternate or sub-opposite in position; these also are rigid 

 and straight, and are fascicled to within a short distance of the distal end. 

 All the parts of the colony are in the same plane. Hydrothecae are given 

 off the stem, primary and secondary branches; they are arranged alter- 

 nately, and on the terminal portion of the secondary branches, this alter- 

 nation is quite regular. The hydrotheca has a short pedicel, and there is 

 a slight twist where the hydrotheca leaves the pedicel. The hydrotheca 

 is nearly tubular, and is curved much like that in L. gracillima, but the 

 whole hydrotheca and pedicel are like those of Zygophylax rigida Fraser, 

 but they are entirely free from the stem or branch. As in Z. rigida, there 

 is a nematophore on the basal portion of the pedicel ; it is like the numer- 

 ous nematophores on the tubes of the fascicled stem, all of fair size, and 

 tubular. 



Gonosome. — The coppinia is large, encircling the main stem for a 

 distance of 4 cm or more. The gonangia are large, flask-shaped, and 

 closely crowded. There are no modified hydrothecae in the mass to serve 

 for protection. 



Distribtuion. — Station 1081-40, north of Isla Partida, Gulf of Cali- 

 fornia, 46-76 fathoms; 1 mile south of Ben Weston Point, Santa Cata- 

 lina, 45-49 fathoms. 



Remarks. — This species is much coarser than any other species of 

 Lictorella reported from the Eastern Pacific; in this respect it is more 

 like L. crassicaulis Fraser, obtained in the West Indies, but the branching 

 is not at all similar, nor is there much similarity in the other characters. 

 As mentioned above, the hydrotheca and its accompanying nematophore 

 are much similar to those of Zygophylax rigida. The nearest approach to 

 these in the genus Lictorella appears in L. reflexa Fraser, although here 

 the hydrotheca is smaller and the nematophore is larger. Among the spe- 

 cies already reported, this species must be the closest relative ; the two of 

 them have been obtained in the same region. 



Family Synthccidae 



Genus SYNTHEGIUM 



Synthecium cylindricum (Bale) 



Sertularella cylindrica Bale, Proc. Linn. Soc. N. S. W., (2), 3, 1888, p. 



765. 

 Synthecium cylindricum Fraser, Hyd. Pacific Coast, 1937, p. 124. 



