146 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



The zooecia are rather closely set, 0.35 to 0.40 mm long, not greatly 

 narrowed proximally ; opesia elliptical, occupying about two-thirds of the 

 front; the cryptocyst rather broad, especially proximally. There is no 

 scutum. Two or three spines on the outer distal border. Frontal avicularia 

 are entirely wanting and the lateral avicularia, present on all of the 

 zooecia, are correspondingly large, with hooked rostrum and triangular 

 mandible. 



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

 zooecium, its groove slightly diagonal; seta not longer than a zooecium. 

 The radicle chamber is situated at the proximal end of the vibracular 

 chamber. Two axial vibracula. 



The ovicells are small, smooth and imperforate. 



This very widely distributed species had been noted once before in 

 the Eastern Pacific region, as Hastings has recorded it from the Galapagos 

 Islands at 5 fms. 



Hancock Stations: 272-34, Tenacatita Bay, Mexico, 25 fms; 217-34 

 and 850-38, off Cape San Francisco, Ecuador; and a specimen in the 

 author's collection from the "Gulf of California, W. Mexico." Also, 

 Gulf of Panama, Galtsofll[ collection, on pearl oysters. 



Scrupocellaria spinigera new species 



Plates 19, figs. 7 and 8, and 21, fig. 7 



Zoarium erect, with divergent slender branches ; the internodes vary 

 from 1.00 to 3.00 mm in length and consist of from 2 to 7 zooecia in a 

 series; the joint crosses the outer basal zooecium immediately proximal 

 to the opesia. 



The zooecia are slender and curved (length 0.45 to 0.55 mm ; breadth 

 0.18 at the widest part, narrowed to about 0.12 at the proximal end), 

 the outer border evenly incurved from the tip of the lateral avicularium 

 to the proximal end. The opesia is ellipsoid, length 0.18 to 0.20 mm, 

 sometimes slightly narrowed proximally; the cryptocyst well developed 

 on older zooecia and finely granulated. The scutum is oval with a double 

 cervicorn figure, nearly covering the opesia, attached a little distal to 

 the middle of the opesia, the lower lobe longer, the upper lobe slightly 

 elevated at the tip. The spines usually are 4 outer and 2 inner, all 

 elongate and slender; the first outer spine is the smallest and curved in- 

 ward; the second and third outer and the first inner spine are very 

 elongate (as much as 1.00 mm in length) and spread outward and curve 

 forward somewhat like the fingers of a slightly closed hand. 



Frontal avicularia all of moderate size, short pedunculate, with tri- 

 angular mandible directed laterally; they are situated opposite the base 



