622 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



It is a widely distributed species in the northern hemisphere, in Eu- 

 ropean waters from Norway to the Mediterranean Sea and the Cape 

 Verde Islands, and in the Pacific from British Columbia to the Gala- 

 pagos Islands. As a fossil it is known as far back as the Miocene of 

 Italy. 



Hancock Stations: 155-34, 324-35 and 450, Albemarle Island, 45 

 to 70 fms; 183-34, between Albany and James Islands, 50 to 70 fms, 

 and Barrington Island, 52 fms, Galapagos; 328, Cocos Island, Costa 

 Rica, 14 fms; 1150-40, 1187-40 and 1316-41, Santa Catalina Island; 

 1064, Santa Barbara Island; and 1268-41, Anacapa Island, southern 

 California. Also collected by Miss A. E. Blagg at Monterey Bay, Cali- 

 fornia, and by Dr. John L. Mohr at the San Juan Islands, Puget Sound. 



Proboscina sigmata new species 

 Plate 65, figs. 3 and 4 



A very delicate species. The zoarium is encrusting and consists of 

 linear biserial to quadriserial branches with very sjmimetrical sigmoid 

 lateral curves; the curvature is evidently due neither to the substratum 

 nor to lateral branching, as there is evidence of only one such branch 

 on the outside of a curve. The dorsal side, which is not extended laterally, 

 measures about 0.25 mm in width, and is only slightly wider in the 

 region of the ovicells. 



The zooecial tubules are narrow, slightly embedded, the separating 

 grooves distinct. Their peristomes are thin, about 0.10 mm in diameter, 

 very elongate, averaging about 0.65 mm in length but sometimes more 

 than 1.0 mm, semi-erect, their walls thin and the aperture about 0.08 

 mm in diameter. There is a tendency for the peristomes to arise in 

 alternate pairs; the bases of such a pair may be connate for a short 

 distance but the tips are widely divergent. 



The ovicell is an ellipsoid swelling, pointed at the base where it 

 disappears among the tubules and narrowed more roundly at the distal 

 end where it ends in the terminal ooeciopore, near the base of a peri- 

 stome. In the two ovicells in my material there is no evidence of an 

 ooeciostome, but this may be due to incomplete development. Length 

 of ovicell 0.65 mm, width 0.33 mm. 



Type, AHF no. 57. 



Type locality, off Rocky Point, southern California, at 45 fms, on 

 the surface of a sunken buoy. Earl Fox, collector, two small colonies, 

 both in reproduction. 



