142 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



in number, 3 or 4 outer and 2 inner, the proximal outer and inner spines 

 often bifurcate and erect. 



Small triangular lateral avicularia are present on nearly all of the 

 zooecia, behind the first outer spine. Frontal avicularia are all small, 

 slightly elevated, proximal to the opesia, with a triangular mandible di- 

 rected outward or somewhat downward ; occasionally only the one just 

 proximal to the bifurcation is present. 



Vibracula are found on most of the zooecia, short but nearly as wide 

 as the zooecium, the groove nearly transverse; setae short and weak; 

 radicle chamber at the outer, proximal corner ; radicles strong and with- 

 out hooks. One axial vibraculum. 



Ooecium large and prominent, its distal end elevated, definitely 

 broader than long, covering the distal zooecium to its opesia; length 0.15 

 mm, width 0.18 to 0.20 mm; perforated by non-tubular pores. 



This species closely resembles S. reptans (Linnaeus) but the joint 

 crosses the opesia of the outer zooecium, the vibracular chamber is dif- 

 ferent ; there are forked erect spines and other minor differences. 



Type, AH F no. 35. 



Type locality, Perlas Islands, Panama (author's collection). Also 

 Hancock Station 850-38, off Cape San Francisco, Ecuador, 15 fms; and 

 Station 470, one-half mile north from Black Beach, Charles Island, Ga- 

 lapagos, 9 fms. 



Scrupocellaria profundis new species 

 ! ^ Plates 17, fig. 7 and 21, fig. 1 



Zoarium slender, the branches elongated, 3 or 4 zooecia in a series 

 in an internode. Zooecia large and elongate (0.70 to 0.80 mm long by 

 0.25 mm at the widest part), narrowed below the opening to about 0.15 

 mm at the narrowest part. Opesia long, oval, more than half the frontal 

 length, the mural rim high and thin, smooth, with a slight smooth crypto- 

 cyst. Spines vestigial or wanting; no scutum. Lateral avicularia very 

 minute, often wanting ; frontal avicularia wanting except for one minute 

 avicularium usually present at the side of the proximal end of the opesia 

 of the axial zooecium at a bifurcation. Two axial vibracula, their grooves 

 parallel and as long as those of the lateral ones. The lateral vibracula 

 are small, not visible from the front, about one-fourth as long as a zooeci- 

 um, the groove slightly diagonal ; seta not as long as a zooecium ; radicle 

 chamber on the outer side, rounded and bulbous, radicles smooth and 

 slender. No ooecia present. 



The zooecia bear a rather close resemblance to S. simplex Kluge 

 (1914:607) from the Antarctic, but Kluge's description and figure indi- 



