the collectrok of miss h. gattt. 157 



Plumulauia. 



Plumulabia lagenifera, n. sp. (PI. XXVI. figs. 1-3.) 



Trophosome.- — Stems simple, springing at very ^ short intervals 

 from a creeping reticulated stolon, each internode giving off a 

 short hydrocladium from alternate sides ; hydrocladium with the 

 hydrotheca-bearing internodes separated from one another by 

 several short internodes destitute of hydrothecse. Hydrothecse 

 wide and shallow, somewhat ventricose, springing from a point 

 near the middle of the supporting internode, and adnate to the 

 internode by the entire epicauline side ; a single mesial nemato- 

 phore borne by the hydrothecal internode at the proximal side of 

 the hydrotheca and another on one of the intervening internodes. 



Gonosome. — Gronangia springing singly from the proximal end 

 of the hydrocladium, oboviform, with the orifice raised on the 

 summit of a tubular neck-like projection, and with the base 

 narrowed into a short peduncle of attachment. 



Locality. Vancouver's Island. 



Fluinularia lagenifera covers the surface of seaweeds with a 

 dense growth of delicate hair-like filaments, which attain a height 

 of about 3 inches. 



The specimen was brought by Dr. Harvey from Vancouver's 

 Island. 



Plumulabia multinoda, n. sp. (PI. XXVI. figs. 4-6.) 



Trophosome. — Colony composed of a cluster of delicate simple 

 or very sparingly branched monosiphonic stems, which are divided 

 by transverse joints into rather short internodes, each sending off 

 a hydrocladium from a point close to its distal end ; hydrocladia 

 alternate with the hydrothecal internodes, separated from each 

 other by series of usually five short internodes. Hydrothecse 

 cup-shaped, wide and shallow, situated near the middle of their 

 supporting internodes, to which they are adnate by the whole of 

 their epicauline side ; a single mesial nematophore borne by the 

 hydrothecal internode at the proximal side of the hydrotheca, and 

 another on one of the intervening internodes. 



Gonosome. — Gonangia springing each from the side of a clado- 

 phore, elongated oviform, with the base tapering into a peduncle 

 of attachment, and with the summit tapering towards an even 

 circular, everted orifice. 



Locality. Tauranga, New Zealand. 



LINN. JOUKN. — ZOOLOGT, VOL. XIX. 13 



