in08] Bohcrtson. — Incrusting Bryozoa. 279 



"form" indica; while those fi-om San Pedro agree with no one of 

 the "forms," either the type or otherwise since in different parts 

 of the same colony aviciilaria, ooeeia, and tuberosities or blunt 

 processes are found. The oacia, however, are typical, as are the 

 blunt processes and there seems to be no good reason to consider 

 these colonies as other than unusually fine specimens of the cos- 

 mopolitan species T. rozicri. Hincks reports the "form" gothica 

 as abundant at Santa Monica, California, whose beach is directly 

 continuous with that of San Pedro and whose fauna is almost 

 identical. The mere absence of ooeeia is too slight a character 

 on which to base a difference especially when the ooeeia occur 

 only in scattered groups and so might not be found unless one 

 had abundance of material. The original "form" gothica, viz., 

 Membranipora gothica Busk, was obtained from Lower Califor- 

 nia, and Busk ('56) found two knob-like structures "at the bot- 

 tom of the cell (zocecium) in front" which he considered repre- 

 sent the ovicell. The correctness of this conjecture is, however, 

 doubtful and taken in connection with all the evidence it is 

 probable that M. gothica is a synonym of T. rozieri. 



T. rozieri is abundant at San Pedro, California, found on sea 

 weed at low tide and off shore at a depth of a few fathoms; it 

 has been frequently obtained at various points of the San Diego 



region. 



Cribrilinidae Hincks. 



Celleporidce Johnston, 1847. 

 EscharelUdce, d'Orbigny, 1851. 

 Membraniporidoe, Busk, 1854. 

 Cribrilinidce Hincks, 1880. 



Zoarium incrusting or erect. Zoacia having the front wall 



more or less fissured, or traversed by radiating furrows. 



Cribrilina Gray. 



CribrUinn Gray, 1848, p. 147. 

 Lepralia (part) Johnston, 1847. 

 Beptescharella d'Orbigny, 1851. 

 Escharipora Sniitt, 1867. 

 Cribrilina, Smitt, 1873. 

 Cribilina, Hincks, 1880. 



Zoarium incrusting, Zooecia contiguous, having the front 



wall more or less occupied by tran.sverse or radiating, punctured 



furrows. Orifice semi-circular or snb-orlucular. 



