68 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 16 



Several small corallites are present, the largest calice 3 mm in dia- 

 meter, moderately deep and with 32-38 septa; first and second cycle 

 septa with 2-3 even-sized, sharp paliform lobes, third and fourth cycles 

 with 3-4; uppermost paliform lobe on first and second cycles with an 

 upward projecting, pointed spine; upper parts of septa slightly serrate; 

 septal faces with tall granules ; columella small, papillose. Exterior of 

 corallite covered with a stereomal deposit ; costae when evident very low 

 and diminishing towards base. 



This species has been reported previously only in the Pleistocene of 

 Coronados Island, Gulf of California. 



Hypotype: Cat. no. 27.1 (Sta. 1044-40). 



Material examined: Sta. 1044-40 (6), 



Distribution: South of Tiburon Island, 2-16 fms. 



Astrangia (Astrangia) cortezi Durham and Barnard, new species 



Plate 5, figs. 28a, b 



Corallum colonial, poorly arborescent, composed of numerous coral- 

 lites ranging from 8-10 mm in length, 3.5-5.5 mm in diameter; individ- 

 ual corallites scolecoid to subtrochoid, but closely attached to one another 

 by peritheca; calices subcircular, usually 2-3 mm in depth; septa about 

 48 in number, slightly rounded at the top, then descending sharply to 

 the bottom of the calice ; septal interspaces twice as wide as thickness 

 of first cycle septa; first 3 cycles of septa approximately uniform in size, 

 fourth cycle narrow and apparent only in upper half of calice, disappear- 

 ing at depth and somewhat dentate ; inner edges of first 3 cycles of septa 

 with 5-8 blade-like teeth which merge at the bottom with the columella; 

 teeth with deep U-shaped notches between them, notches usually nar- 

 rower than the teeth; third cycle septa usually fusing to adjacent second 

 cycle septa near columella; first 3 cycles of septa approximately equally 

 exsert, those of first cycle just slightly more exsert than others, fourth 

 cycle less exsert than other cycles ; septal faces with a moderate number 

 of medium-sized granules ; costae corresponding to septa, low, rounded, 

 moderately granulated, intercostal spaces one-third or less the width 

 of the costae, at top of corallum moderately deep, but shallow below; 

 in main portion of corallum costae become obsolete and are only repre- 

 sented by a finely granulated surface; columella composed of 8-10 pali- 

 form teeth. 



Remarks: This species appears to be closely related to A. {As- 

 trangia) caboensis Durham, but may be separated from that species by 

 the greater number of septa and by the fact that the fourth cycle septa 



