136 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



Hincks did not figure it, nor was he able to observe the ovicell. Robertson 

 lists the species from San Francisco to south of Point Conception, Cali- 

 fornia. O'Donoghue records it from numerous places in British Columbia 

 and Puget Sound. 



Hancock Stations: 1250-41, San Benito Island, west coast of Lower 

 California, the farthest south it occurred. Northward from this point it 

 was taken at Stations 1059, 1951 and 1234 at San Miguel Island, 1191 

 at Cortez Bank, 1281-41 and 1283-41 at Santa Rosa Island, southern 

 California, and 1492-42 at Cape Arago, Oregon. Since it did not occur 

 regularly in dredge hauls, though it is common along shore, it is probably 

 limited to rather shallow water. 



Scrupocellaria diegensis Robertson, 1905 

 Plates 15, fig. 9, and 22, fig. 1 



Scrupocellaria diegensis Robertson, 1905 : 261. 

 Scrupocellaria diegensis, O^Dono^nt, 1923:18; 1926:41. 



Zoarium coarse, large (50 mm or more in height), bushy; internodes 

 elongate, as many as 12 zooecia in a series; joint crossing the proximal 

 part of the opesia of the outer zooecium. 



The zooecia are moderately large, 0.45 to 0.55 mm long by about 

 0.26 mm wide, the outer margin straight. The opesia is large, oval, and 

 occupies considerably more than half of the frontal surface, the crypto- 

 cyst broad and finely granulated. The scutum is ellipsoid in form, the 

 proximal lobe longer, not quite covering the opesia and attached by a 

 strong pedicel a little above the middle of the opesia ; the cervicorn figure 

 is only slightly developed. Spines, 3 outer and 2 inner, strong, and the 

 first outer and inner spines frequently bifurcate. 



The frontal avicularia are usually small, slightly raised, with a tri- 

 angular mandible, but giant avicularia, more elevated, with a compressed 

 rostrum and attenuated mandible which is strongly curved, occur especi- 

 ally on the axial zooecium. The lateral avicularia, on every zooecium, 

 are small with a triangular mandible. The vibracular chamber is excep- 

 tionally large, elongate (as long as 0.30 mm), prominently exposed from 

 the frontal view for about two-thirds of its length, its groove longitudi- 

 nal; the setae are coarse and elongate, frequently more than 1.00 mm 

 long. The radicle chamber is at the outer side of the proximal end of the 

 avicularian chamber. 



The ooecium is large, prominent, slightly broader than long, some- 

 what flattened and provided with numerous pores. 



