WEST COAST HTDEOIDS 53 



like processes "which may curve upward, or downward, or be di- 

 rected straight outward, according to the species" (Nutting). 



As nematocysts are found in many species of the Lafoeidw 

 group, I do not see any necessity of the genus Zygophylax that 

 Quelch has instituted. Even in Lictorella pinnata (Sars), they 

 are commonly present, though they seem to have been generally 

 overlooked, probably because they are so easily broken off. E. T. 

 Browne, in describing L. pinnata,-^ is the only one who has called 

 attention to them directly, as far as I know, Avithout putting the 

 species in another genus, while Broch-^ in calling attention to 

 this reference, remarks that if the species has nematocysts, it 

 must belong to the genus Zygophylax. Nutting in his Hawaiian 

 Island paper,-^ when defining the genus Lictorella, mentions the 

 frequency with which nematocysts are found in this genus. 



LICTOEELLA CAROLIXA new species 

 PI. 1\, Figs. 3-5 



Trophosome. — The only specimen of this species, 2.5 cm. in 

 length, was found detached, so that it may or may not have been 

 a complete specimen. The main stem is polysiphonic, with com- 

 paratively few hydrothecs, and was probably erect. The 

 branches coming off from the main stem are also polysiphonic, 

 but the tubes are much reduced in number, gradually disappear- 

 ing until in the secondary branches there is but a single tube. 

 An appearance of dichotomy is produced in most cases by a 

 hydrotheca from one tube originating in such a way that it seems 

 to come from the axil formed by the branching of another tube. 

 The ultimate branches are divided into internodes of almost 

 equal length by deep constrictions. From each internode, nearly 

 midway between the nodes a single hydrotheca is given off. 

 These hydrotheca alternate on successive internodes but are all 

 in the same plane. At the origin of each of these there is a dis- 

 tinct shoulder on the branch, which is divided by a deep con- 

 striction from the base of the hydrotheca. On this shoulder 

 there are two nematocysts present, which are deeply cup-shaped 

 and supported by a two-ringed pedicel. Evidently they are very 

 easily broken off, as I could find very few perfect ones, but the 



23 Hydroids collected by the ' ' Huxley ' ', 1906. p. 27. 



-i Hydroiduntersuchimgen II, 1909, p. 201. 



23 Hydroids of the Hawaiian Islands, 1905, p. 945. 



