60 AMERICAN HYDROIDS. 



PLUMULARIA FILICAULIS Kirchenpauer. 

 (Plate II, fig. 6.) 



I'lumularia filicaulis KIRCHENPAUER, Ueber die Hydroidenfamilie Plnimilaritl:i', 1X76, Pt. 2. p. 47, pi. v, fig. 6. 

 I'lumnUina jHicaulis BALE, Australian Hydroid Zoophytes, 1884, p. 134. pi. xi. 



Trophosome,. Colony attaining a height of about one-fourth inch, sparsely branching, not 

 fascicled; stein divided into iuternodes which are conical in front view and give off hydrocladia 

 from their proximal portions; hydrocladia with short iuternodes, every alternate one bearing a 

 hydrotheca near its proximal end; intermediate interuodes somewhat shorter than the hydrothe- 

 cate. Hydrothecii' closely approximated for this genus, eampuuulate in form and attached to the 

 hydrocladia by the basal half only; there is a corrugation on the posterior surface of the hydro- 

 theca extending about two-thirds around to the anterior face; a mesial nematopliore on the prox- 

 imal end of each intermediate interuode, and one in the form of a pediculate projection from the 

 distal part of the iuternode, which curves upward and supports the hydrotheca in front; supra- 

 calycine nematophores wanting in some specimens, but present in others. Color of dried specimens 

 reddish brown. 



Gonosome. Not known. 



Distribution. Found growing on alga- from the Bay of Talcaliuano, Chile: Portland, 

 Australia (Bale). 



This species was originally named by Poeppig, who did not figure or describe it. Many years 

 afterwards Kircheupauer found the dried specimens and described the species as named by Poeppig 

 in manuscript. A mere naming of a species without description or figure does not, in the opinion 

 of the writer, meet the requirements of scientific description, and hence the species is here 

 ascribed to Kirchenpauer. 



I am indebted to Professor W. M. Bale for an Australian specimen of this rare species. In this 

 specimen both the branched and unbranched forms are found growing from the same hydrorhiza, 

 and both have supracalyciiie nematophores. 



PLUMULARIA CATHARINA Johnston. 

 (Plate III, tigs. 1, 2.) 



riiimularia catharina JOHNSTON, Mag. Nat. Hist., 1833, VI, p. 498. 



I'liimnltii-ia catharina JOHNSTON, Brit. Zooph., 1847, p. 97. 



.Iglaoplienia catharina GRAY, Cat. Brit. Mus. Kadiata, 1847, p. 81. 



I'lumularia catharina HIXCKS, Brit. Hydroid /ooph., 1868, p. 299, pi. LXVI. 



I'lnmulariu catharina KIRCHENPAUEI;, Hydroidenfamilie Plumularid r, 187(5, p. 27. 



Plumularia catharina MARKTANNER-TuRNERETSCHER, Anualen des k. k. naturhist. Hofmnsenras, 1890, p. 253. 



Trophosome. Colony growing in tufts of plumose stems, attaining a height of 4 inches;' stem 

 not fascicled, proximal portion divided into irregular iuternodes, that portion bearing hydrocladia 

 divided into alternating longer and shorter interuodes, the shorter bearing the hydrocladia and a 

 single hydrotheca each, the longer bearing nematophores only; hydrocladia opposite, borne on 

 opposite sides of the stem, lying in the same plane and divided into alternating hydrothecate and 

 intermediate iuternodes, the latter being slightly the longer with a square node at its proximal 

 and an oblique node at its distal end. Hydrothecu- rather closely approximated, cup-shaped, about 

 as deep as wide, margins slightly everted; lateral nematophores borne on lengthened processes 

 from the internode and reaching the margin of the hydrotheca; usually two mesial nematophores 

 on each ititeruode of hydrocladia, but often only one on the hydrothecate interuode; cauline 

 uematophores numerous, scattered somewhat irregularly over the front of the stem. 



Gonosome. Gonangia (female) large, ovate, operculate, pediculate, with a pair of nematophores 

 at their bases; or (male) smaller, much more slender and without nematophores, according to 

 Hiucks's figure. Both kinds of gonophores are found on the same stem and even on the same 

 hydrccladitim, where they spring from the hydrothecate internode just below the base of the 

 hydrotheca. 



Distribution. Coasts of Great Britain down to CO fathoms (Ilincks); Albatross Station 2CGG, 

 lat. N. 30 47' 30", long. W. 79 49', 270 fathoms. 



1 History of British Hydroid Zoophytes, 1868, p. 301. American specimens are usually iiiiu-h smaller, scarcely 

 attaining a height of two inches. 



