140 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



visible from a frontal view, the groove diagonal ; seta slender and as long 

 as two or three zooecia. Radicle chamber small, situated at the outer 

 proximal border of the avicularian chamber ; radicles smooth, with a few 

 retrorse barbs (diameter 0.03 mm). One axial vibraculum. 



Ooecium flattened, very prominent, the tip elevated and extending 

 upward and forward over the proximal one-third of the opesia above the 

 scutum; the surface roughened by irregular lines and with small short- 

 tubular pores. 



Type, AHF no. 34. 



Type locality, Acapulco, Mexico, 15 fms, Capt. Fred E. Lewis, col- 

 lector. Also at Hancock Stations 270, Angel de la Guardia Island, 14 

 fms; 2180, Magdalena Bay, Gulf of California, 18 fms; 1281-41, Santa 

 Rosa Island, southern California, 23 fms; and 1856-49, Santa Barbara 

 Basin, 321 fms. 



Scrupocellaria obtecta Haswell, 1880 

 Plates 18, fig. 7, and 21, fig. 4 



Scrupocellaria obtecta Haswell, 1880:37. 

 Scrupocellaria obtecta, Harmer, 1926:378. 



Zoarium much branched, spreading over sponges ; internodes usually 

 of 4 zooecia in a series but there may be 6 or more. The joint crosses the 

 proximal part of the opesia of the outer zooecium, involving it to near 

 the origin of the scutum ; on the inner zooecium the joint crosses immedi- 

 ately proximal to the opesia and sometimes involves its lower border. 



Zooecia stout and closely set, ranging from 0.30 to 0.40 mm long by 

 0.20 mm wide, narrowed to about 0.14 mm at the proximal end, the 

 outer border nearly straight. The opesia is large, occupying two-thirds 

 of the frontal length, its rim sHghtly raised and the cryptocyst well de- 

 veloped and finely granulated. The scutum, which does not conform in 

 shape to the opesial area, is roughly triangular in outline with the corners 

 rounded, the proximal lobe is longer, the alcicorn figure conspicuous and 

 the stalk is strong. Spines usually 3 outer and 2 inner, the second and 

 third outer and first inner spines are long and strong, the others much 

 weaker, and all are jointed at a little distance above the base. There is 

 no indication of bifurcation of any of the spines. 



The frontal avicularia, wanting on many zooecia, are slightly ele- 

 vated, considerably compressed, with a pointed rostrum and mandible, 

 both of which are strongly hooked, directed laterally, those on the axial 

 zooecia often larger and much elevated. The lateral avicularia, usually 

 present, are small with a triangular mandible. 



