142 



UNITED STATES NATIONAL MUSEUM BULLETIN 251 



66. Ascidia minuta Tokioka 



FiGUEE 52 



Asoidia minuta Tokioka, 1950, p. 129, fig. 10. 



MATERIAL EXAMINED 



Palau Islands : Barrier reef 8 mi. NW. of Koror Island ; GVF sta. 25. Two 

 small specimens (USNM 11384). — Iwayama Bay, Geruherugairu Pass; GVF sta. 

 85. One specimen imperfectly preserved (USNM 11451). 



Description. — Of the three specimens examined from the Palau 

 Islands, two are probably juveniles and less than 3 mm. in length, the 

 other is 8 mm. in length and torn in the posterior part of the body. 



Branchial aperture terminal, 6-lobed, each lobe more or less sub- 

 divided into two lobules ; atrial aperture situated near middle of right 

 side of body and 10-lobed in largest specimen. Test thin and trans- 

 lucent or transparent, surface usually holds fine sand or other foreign 



a 



Figure 52. — Ascidta minuta Tokioka: a, 3 mm. specimen; b, left side of mantle body of 

 same; c, ciliated groove of 8 mm. specimen; d, dorsal languet of same; e, a supporting 

 process of inner longitudinal vessels. 



