72 University of California Publications. [zoology. 



each leaflet, save first and last, carrying on its anterior edge eight neniato- 

 phores. There is one hydrotheca (exceptionally two) between corbula and 

 stem. Gonophores in two rows, about twelve in number; oval statoblasts. 

 Color. Stem dark horn ; hydroeladia light brown. 



Distribution. San Diego, Cal., on piles of wharf, and at 

 month of harbor in 3-7 fathoms, July, 1901. 



This species differs from A. pluma, which it closely resembles, 

 in the possession of a recurved median tooth and much longer 

 stems and hydroeladia. 



Aglaophenia inconspicua, sp. nov. 



PI. IX. Figs. 87, 88, 89. 



Trophosome. Stems in clusters, stout, 35-40 mm. high; divided by 

 antero-posteriorly oblique nodes into internodes as broad as long. Hydro- 

 eladia borne on same side of stem, alternate, one from each internode, 

 3-4 mm. long; divided transversely into internodes of equal length. A 

 nematophore in the axil of each hydrocladium and two at its base, in line 

 with its axis. Hydrothecae deep, slightly compressed, free for not more 

 than one-fourth their length; median tooth recurved, the next one on either 

 side longest. Intrathecal ridge extending obliquely upward from near base 

 of theea. Two ridges on each internode. 



Mesial nematophore reaching nearly or quite to the mouth of theca. 

 Supracalycine nematophore divergent, not reaching level of mouth of theca. 



Gonosome. Corbulae in place of hydroeladia, not more than twice as long 

 as deep, arched, slightly compressed; form of tour to six leaflets the longest 

 with ten nematophores on distal edge and occasionally one or two at tip of 

 proximal edge. One well formed hydrotheca on distinct internode at base. 

 Gonophores sporosacs, six to twelve in number. 



Dimensions. Hydrotheca: length, .29mm.; width, .155mm. Hydro- 

 eladial internode, .24-. 28mm.; cauline internode, .18-. 20mm. Corbulae, 

 2mm. long; greatest diameter, 1.1mm. 



Distribution. San Diego, Cal., 5 fathoms. July, 1901. 



Several shoots were growing in a cluster of A . struthionides, 

 and so closely resembled the smaller shoots of the latter in color 

 and habit that at first I overlooked them, distinguishing them 

 finally by the shape of the corbulae and the much smaller hydro- 

 thecae with nine instead of eleven marginal teeth. 



A. inconspicua approaches the European A. pluma, from 

 which it differs in the recurved form of the median tooth, the 

 shape of the corbula and the stiff, ungraceful habit. 



