96 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



in most places. Internal longitudinal vessels fairly numerous, both 

 on the intervals and on the folds. In a fairly large specimen a count 

 of them resulted as follows : 



dorsal 4 (23) 5 (19) 6 (21) 4 (12) 5 ventral. 



Stigmata numerous and narrow ; 7 or 8 intervene between internal 

 longitudinal vessels on the intervals between folds in the dorsal part 

 of the sac; in the ventral part often 10 to 12, or more; next to the 

 endostyle the fields often contain about 20 stigmata. 



Intestine of large diameter, but forming a rather narrow loop in 

 the posterior part of the body. Stomach inconspicuous, being neither 

 of large diameter nor showing very distinct plications on the ex- 

 ternal surface. Rectum moderately long, making a fairly sharp bend 

 at its origin. Margin of anus with many lobes. 



Owing to the condition of the specimens, and to the fact that 

 these organs are deeply buried in the thick opaque tissues of the 

 mantle, the gonads are not easily distinguished. Apparently they are 

 rather small short sacs containing eggs and small pyriform testes, 

 and are distributed in moderate numbers on each side of the body 

 (on the left side anterior to the intestinal loop only). No evidence 

 was found of their becoming confluent with each other as in the next 

 following species. 



This species is represented by specimens from 5 stations; 21 

 fathoms being the greatest depth recorded. 



No. 128. Mansalay, Mindoro (reef). June 4, 1908. One specimen, attached 

 to a piece of coral. (Cat. No. 6014, U.S.N.M.) 



No. 107; Surigao, east coast of Mindanao (reef). May 8, 1908. One speci- 

 men. (Cat. No. 6015, U.S.N.M.) 



No. 161. Station D5254, off Linao I'oint, Gulf of Davao, 21 fathoms, sand 

 and coral, May 18, 1908. One specimen. (Cat. No. 6018, 

 U.S.N.M.) 



No. 159. Station D5156, off Tinakta Island, Sulu Archipelago, 18 fathoms, 

 fine sand and shells, February 21, 1908. One specimen. (Cat. 

 No. 6017, U.S.N.M .) 



No. 131. Tumindao Reef, south end, near Sibutu Island, Sulu Archipelago, 

 February 26, 190S. Two specimens. (Cat. No. 6016 U.S.N.M.) 



There are specimens in the United States National Museum from 

 Porta Galera Bay, Mindoro, collected by S. F. Light, who reports it 

 common also at Culion Apo, and at Tatay, Palawan. 



This large and conspicuous form is common and widely distributed 

 in the Malayan region, and was collected by the Siboga expedition 

 at many stations, 74 meters being the greatest depth of any of them. 

 Herdman, 1899, has described a variety {plana) from Port Jackson, 

 Australia. In life P. aurata is said to be yellow or orange in color 

 (Willey, 1902, p. 712). Pandocia botryllifera Michaelsen, 1912, from 

 Samoa is evidently a very closely allied form. 



