174 UNITED STATES NATIONAL MUSEUM BULLETIN 251 



Figure 71. — Polycarpa cryptocarpa (Sluiter): Simple ciliated grooves of the specimens 

 from a, the Solomon Islands and b, Bikini Island. 



the body is extended into a 15 mm. long peduncle. Surface generally 

 fouled with sponges, compound ascidians, and other organisms. 



Test leathery, usually brownish black or purplish black, although 

 yellowish brown in two specimens respectively from Bikini Lagoon 

 and the Gilbert Islands. Section and inner surface of test are whitish, 

 grayish white, or sometimes faintly greenish or purplish. Mantle 

 rather thick and dark brownish, brownish black or purplish black. 

 Viscera also brownish black. Very frequently many small, 150-160/i, 

 in long diameter, oval capsules full of brownish-black pigment scat- 

 tered over surface of mantle. Ciliated groove very complex in con- 

 figuration, but may be rather simple in a few cases (fig. Tla, &). 

 Gonads distributed nearly evenly over entire imier surface of mantle 

 and buried beneath relatively thick mantle tissue, practically invisible 

 from surface. Some specimens carry parasitic copepods or pontonid 

 shrimps in branchial sac. 



87. Polycarpa iwayamae Tokioka 



Figure 72 

 Polycarpa iwayamae Tokioka, 1950, p. 143, fig. 18. 



MATERIAL EXAMINED 



Pai^u Islands : Iwayama Bay, west side of Kogai-hanto, Auluptagel Island ; 

 GVF sta. 100. Two specimens attached to Spondylus shell (USNM 11417). — 

 Iwayama Bay, east side of Oyster Pass ; GVF sta. 220. One specimen 60 mm. 

 long (USNM 11412).— GVF sta. 220A. One specimen 55 mm. long (USNM 

 11415). 



Gilbert Islands : Onotoa Atoll ; P. E. Cloud, sta. GOC-35. One specimen 20 

 mm. long (USNM 11494) . 



