NO. 1 OSBURN : EASTERN PACIFIC BRYOZOA — CHEILOSTOMATA 147 



of the scutum of the adjoining zooecium and occur on practically all of 

 the zooecia. The lateral avicularia also occur on every zooecium, small 

 but prominent with triangular mandible. There are no giant avicularia. 

 The vibracular chamber is elongate, one-third or more the length of a 

 zooecium and visible from in front for about half of its length; groove 

 longitudinal; the setae are strong and very elongate (as long as 1.80 mm, 

 but usually shorter). The radicle chamber is situated laterally between 

 the base of the vibraculum and the lateral avicularium ; radicle 0.04 mm 

 in diameter, with numerous strong retrorse barbs near the distal end. 



Ooecium prominent (length 0.20 by width 0.18 mm) with a few 

 small, short-tubular pores which are connected by wavy lines. 



This species resembles S. pusilla (Smitt) of the Atlantic in the form 

 of the zooecia and the exsertion of the vibracular chamber, but it is much 

 larger in all of its measurements and has a full quota of frontal avicularia, 

 none of which are enlarged or otherwise modified. 



Type, AHF no. 38. 



Type locality, Hancock Station 1340-41, Tanner Bank, off San Di- 

 ego, California, 32°4r00"N, 119°06'30''W, 38 fms. 



Also at Stations: 1112-40, San Gabriel Bay, Espiritu Santo Island, 

 Gulf of California, shore; 1247-41, Ranger Bank, off Cedros Island, 

 Mexico, 77 fms; 1150-40, Avalon Bay, Santa Catalina Island, southern 

 California, 98 to 116 fms; 1896-49, middle of Tanner Bank, 22 fms. 



Scrupocellaria talonis new species 

 Plates 17, fig. 3; 19, fig. 3, and 20, fig. 7 



Zoarium erect, internodes of moderate length (1 to 2 mm), with 4 to 

 6 pairs of zooecia, the joint proximal to the opesia on both outer and 

 inner zooecia of the branches. 



Zooecia about 0.40 mm long by 0.20 mm wide at the widest part, 

 narrowed to 0.13 mm or even less near the proximal end, the distal end 

 rounded and without angulation. Opesia elhptical, large, occupying a 

 little more than one-half of the frontal length; cryptocyst moderately 

 developed, finely granulated. Spines small, weak, one outer and one inner, 

 often wanting. The scutum is a small spine, occasionally slightly notched 

 at the tip, curving over the opesia, attached somewhat above the middle 

 of the opesial border, often wanting. 



Frontal avicularia small, usually one on the axial zooecium below a 

 bifurcation in the midline, the mandible triangular and directed laterally; 

 rarely another avicularium down on the intemode. The marginal avicu- 

 laria are of two kinds, normal and giant. The normal triangular ones 

 are moderate in size and occur on most of the zooecia; the giant avicu- 



