82 IF. J/. BaU : 



latter invariably fail to exhibit any liydrotheeae witli characters 

 tending towards the S/I/nilan'a form. The distinction Isetween the 

 trophosomes is absolute, and I consider it lieyniid a doubt that 

 Eucopella campainddria, as originally described, comprises two 

 distinct species, one a typical Orfliopij.ris. tlie (.tlier. at least so 

 far as the trophosome is concerned, a typical SlJiciilaria. 



The acccvunt of the gonangia of E. ca luixnnddrld is contradic- 

 toiy, theii- length lieing stated as from two To tliree millimetres, 

 while they are fitiured as under .75 mm. ; but their compressed 

 •condition, and their cuneate outline, as seen in their broader 

 aspect, are (juite similar to the same features in the typical 0. 

 cornpressa. Only, therefore, in the event of future research reveal- 

 ing some important difference between the gonozooicl of that species 

 and Von Lendenfeld's description will be possible to maintain the 

 specific distinctness of E. campamilaria. 



0. compresm is found in Xoilli and Soutli Ameiica, where, like 

 Von Lendenfeld's specimens, is appears to giow hal)itually, if not 

 exclusively, on Laminaria. 



ORTHOPYXtS AXGULATA, U. sp. ( PU. 



Hydrorhiza thick and broad, pedunch 

 smootli, occasionally with one or more 

 rowed in at tjie base. 



Hydrothecae, in the broader aspect, very wide at the base, with 

 the floor somewhat flattened, often more or less thickened, thick- 

 ening sometimes confined to a convex band surrounding the distal 

 portion of the hydrotlieca, sometimes extending to the base ^ narrow 

 aspect funnel-shaped, with thin walls, except for a slight thicken- 

 ing where the sub-marginal band extends to them; margin plain, 

 everted. Length, .'M) — .45 mm., widtli at aperture. .27 — .37 mm. 



Gonotliecae broad, muclr compressed, the broad aspect ovate, trun- 

 cate, with edges undulated; a little narrov.ed in near the top, and 

 then widening outward and upward, forming angular projections 

 at each side of the top, or even produced into blunt, horn-like pro- 

 cesses, summit of the gonangium straiglit or sliglitly concave be- 

 tween them. Length, about L27 — 1.36 nmi.. width, .87 — .96 mm. 

 Two gonophores in each gonotheca ; lunbrella with foui- b)'ancliing 

 radial canals, and eight otocysts. 



//a7^._Port Phillip (Mr. J. Brace])ridgv \Vils(ui). 



This species agrees with 0. roniprcssa, and differs fiom the other 

 forms here described, in the stout, thick-walled, smooth peduncles. 



