348 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 10 



2. Distal spike pennate (pi. 35, fig. 73) .... P.lapidosa 



2. Distal spike plumose (pi. 37, fig. 87) .... P. californica 



3. Larger; tubes coarse; opercular paleae with distal appendage 

 frayed (pi. 35, fig. 76) P. rnoerchi 



3. Tiny; tubes small, fine; opercular paleae with distal appendage 

 entire (pi. 37, fig. 84) P. peruensis 



Phragmatopoma lapidosa Kinberg 

 Plate 35, Figs. 73-75 ; Plate 36, Fig. 79 ; Plate 40, Figs. 102, 103 



?P. caudata (Kroyer) Morch, 1863, p. 442. 



Kinberg, 1867, p. 349. 



Sabellaria (Pallasia) castelnaui Grube, 1870, p. 69; Augener, 1926, pp. 



214-216. 

 Sabellaria fauveli Gravier, 1909, pp. 650-654, pi. 18, figs. 60-69. 

 Johansson, 1926, p. 2; 1927, pp. 99-100. 



Centrocorone spinifera Treadwell, 1939, pp. 1-3, figs. 1-9; 1939, pp. 307- 

 309, fig. 118. 



Collections.— A 20-39 (3 ) ; A 25-39 ( 1 ) . 



Other materials examined. — Type specimen, Swedish Museum (no. 

 921). The following at the U.S. National Museum: Itajahy, St. Catha- 

 rina, Brazil, coll. H. Liiderwaldt in 1919 (6+) ; east of Gaullie, Florida, 

 shore, coll. E. M. Kindle, Dec. 10, 1938 (10+) ; Miami Beach, Florida, 

 shore, coll. Capt. Frank O. Bowman, July, 1936 (20+) ; ocean jetty 

 near Norris Cut, connecting Biscayne Bay with Atlantic, about 3^ mi, 

 east of Miami, Florida, coll. E. Bursten Thomson (tube masses) ; from 

 rocks near Praia, Sao Francisco, Brazil, shore, coll. W. L. Schmitt, Oct. 

 1926 (tube masses) ; Conto do Rio, Brazil, shore, coll. W. L. Schmitt, 

 Aug. 1925 (1 + ). 



P. lapidosa has been redescribed by Johansson (1927, pp. 99-100) 

 and clearly distinguished from other species. The opercular crown is 

 more or less circular, flattened; outer paleae are characteristic, having a 

 long, conspicuous, pinnate plume, arising some distance from the upper 

 distal edge of the palea (pi. 35, fig. 73). The opercular crown and stalk, 

 from the right side, are shown in pi. 36, fig. 79; from the front, the 

 crown is more or less circular, flattened. There are about 10 rows of oral 

 tentacles. Palpi are long, slender, tentacular. Abdominal tori, from about 

 the fourteenth abdominal segment, are very long. Total number of 

 abdominal segments is 32 or more. 



P. lapidosa may be an important agent in constructing sandy reefs in 

 warmer parts of the west Atlantic; from Brazil, north to Miami, Florida, 



