402 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



is absent the pores extend forward to the aperture. No spines. Ovicell 

 wanting in our specimens, but Hincks describes it as large, immersed, 

 the surface roughened and punctured around the edge. 



Houston Stewart Channel, British Columbia (Hincks). 



Hancock Stations: 650-37, San Francisco Island, Gulf of California, 

 24°47'35''N, 110°32'20"W, at 47 fms; and 1258-41, Natividad Island, 

 oflE Lower California, 27°44'17''N, 115°14'20"W, at 66 fms. Also a 

 specimen from off San Pedro, southern California, "deep water." 



Smittina arctica (Norman), 1894 

 Plate 47, figs. 13-14 



Smittia arctica Norman, 1894:128. 



Escharella porifera var. majuscula Smitt, 1867:9, Plate 24, figs. 36-38. 



Smittina arctica, Norman, 1903:121. 



Smittina arctica, Nordgaard, 1906:29. 



Zoarium encrusting. The zooecia are usually quite regular in ar- 

 rangement, elongate-ovate; the front considerably inflated, a tremocyst 

 evenly perforated with small pores. The primary aperture is about as 

 wide as long, rounded with the proximal border transverse; the lyrula 

 is of moderate width (Norman, 1903:121, describes it as slender, but 

 it is often as wide as it is long) ; the cardelles small, often scarcely notice- 

 able. The peristome is thin and raised on the sides, embracing the suboral 

 avicularium on the proximal border, more or less fused with the ovicell 

 in fertile zooecia. The avicularian chamber is comparatively small and 

 low, the rostrum projecting slightly over the aperture and bearing a 

 semicircular to subtriangular mandible. 



The ovicell is quite prominent in the young stage, more or less 

 embedded later, with a few minute pores or punctures and usually with 

 a transverse groove across the top formed by the union of the secondary 

 covering layers. 



This is an arctic species and is probably circumpolar in distribution. 



Point Barrow, Alaska, Arctic Research Laboratory, G. E. Mac- 

 Ginitie, collector. 



Smittina retifrons new species 

 Plate 47, figs. 6-8 



Zoarium encrusting shells and the stems of hydroids, uni- or multi- 

 laminar, white or light yellowish, with a shining ectocyst. The zooecia 

 are elongate-hexagonal, regularly arranged in quincunx, averaging in 

 length about 0.65 mm by 0.50 mm in width, distinct in younger stages 



