752 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



Terebripora comma Soule, 1950 

 Plate 80, fig. 6 



Terebripora comma Soule, 1950:380. 



The zoaria have successive zoids alternately placed to the right and 

 left of the primary stolon at the end of a short secondary stolon. The 

 short lateral stolon has a septum at the junction point where the stolon 

 meets the zoid. The secondary stolons enter the zoids about midway 

 between the distal and proximal extremities of the zoids, but always 

 nearer to the distal end. Two types of zoids are in evidence, the auto- 

 zoids (feeding individuals) and zoids modified for reproduction that 

 may be termed gonozoids for convenience. Anatomically, the autozoids 

 are typical of the usual ctenostomate type. The polypide bears a promi- 

 nent globular gizzard. In length the autozoids range from 0.32 to 0.35 

 mm, and in width from 0.06 to 0.08 mm. The tentacles are short, and 

 are 8 in number. The autozoids are elongate, with the distal aperture 

 bluntly square, and the proximal portion terminating in a tapering 

 rounded point. No brown bodies were seen. The reproductive zooecia 

 or gonozoids have a prominent, large, oval embryo measuring about 

 0.06 mm in diameter at maturity. In length, the gonozoids range from 

 0.29 to 0.33 mm, and in width from 0.07 to 0.08 mm. 



Hancock Station, 1937-50, Anacapa Island, southern California. Also 

 off Newport, southern California. Depth, 18 to 43 fms. 



Family Immergentiidae Silen, 1946 



Zoaria with only primary stolons, that are not stolons in the strict 

 sense, being prolongations of the zoids. These stolons arise directly from 

 the distal tips of the preceding zoids, and connect one zoid with another 

 in a series. 



Genus IMMERGENTIA Silen, 1946 



Zoaria imbedded in the shells of both living and dead mollusks. The 

 stolonal connections between zoids are slender, thread-like, originating 

 at the distal ends of the zooecia. The zoids are small in size, elongate, 

 narrow. The proximal end may be bluntly rounded or tapered to a 

 narrow point. The distal tip bears a centrally placed square shaped 

 aperture. No zoid specifically modified for reproduction is known to 

 occur. Genotype: Immergentia calif ornica Silen, 1946. 



