136 W. M. Bale: 



Not Plumularia (for Aglnnpheiiia) vitiana, Kircheupauer, 

 Abh. Nat. Ver. Hamb., v., 1872, p. 34, pi. i. iii., fi^. 9; 

 Billard, Arch. Zool. Exp. et Gen., 4 Ser.. vii.. l!)07. 

 p. 388, figs. 22, 23. 



Hydrophyton aljoiit one inch in height, polysiphonic in the ohler 

 portions only, and small specimens monosiphonic througlnnit ; 

 branched or unbranched, branches when present all in one plane, 

 given off at very wide angles from the supplementary tubes; inter- 

 nodes normally supporting each a hydrocladium, but the nodes 

 often indistinct. Hydrocladia straight, alternate, divergent at a 

 wide angle (about 65 deg.) in one plane, nodes transverse, doisum 

 -of hydrocladia slightly serrate. 



Hydrothecae borne on the front of the hydrocladia, tubular, more 

 or less abruptly bent in the middle (proximal and distal extremities 

 being bent away from the hydrocladium); a -rudimentary ridge or 

 fold near the base, directed obliquely forward ; aperture expanding, 

 border with a large strongly-incurved anterior tooth, two large 

 triangular teeth on each side, and two angular lobes above the 

 lateral sarcothecae ; back entire, adnate. A very slight septal ridge 

 generally present, opposite the intrathecal fold. 



Mesial sarcothecae free for about half their length, embracing 

 the whole of the proximal part of the hydrotheca, and then project- 

 ing forward over the aperture; with a small circular terminal orifice 

 and a larger inferior one adjoining the hydrotheca, the two united 

 by an inconspicuous slit; an additional orifice opening into the 

 hydrotheca. Lateral sarcothecae small, sub-conical, directed for- 

 ward or downward and somewhat outward, terminal and lateral 

 apertures generally united. Cauline sarcothecae with wide, free 

 distal margin, two at the base of each hydrocladium. A minute 

 apparent perforation on each hydrocladium-process. 



Gonangial ramules with a normal hydrotheca on the first inter- 

 node; corbula consisting of about five pairs of leaflets with lobed 

 edges, which are united by the lobes, leaving a series of small 

 openings between them; rows of sarcothecae very irregularly placed. 

 those nearest the rachis mostly bordering the distal edges of the 

 leaflets, but those higluT up Iti sliort rows, not at the edges; each 

 leaflet with a large sinus near the base on the distal side, in which 

 is seated a small hydrotheca with its two lateial sarrotln'cae. Rachis 

 generally produced beyond the coibula, its tL'rniinal portion sup- 

 porting about two somewhat moditied liydrothrcae. 



Colour, light brown. 



