184 UNITED STATES NATIONAL MUSEUM BULLETIN 251 



MATERIAL EXAMINED 



Japan: Hokkaido Island; Otaru. E. S. Morse, coll. One specimen (USNM 

 11692). 



Description. — A single 13 mm. tall specimen attached to the sur- 

 face of a specimen of Pyura mirabilis Drasche collected in Japanese 

 waters was examined. It is roughly hemispherical (fig. 776) and 

 attached to the substratum by the right ventral side. Both apertures 

 sessile. Test extremely thin, but tough, pale brownish white, surface 

 quite smooth. On mantle body branchial aperture nearly terminal, 

 atrial subterminal. Mantle thin but strong, brownish orange, color 

 deepest on siphons. Atrial tentacles found on velum. Tentacles about 

 17( ?), edge of dorsal lamina irregularly serrated (fig. 77e). Ciliated 

 groove simply U-shaped. Six slender gonads on each side. About 

 30 testicular follicles found on a 4.5 mm. long undulating gonad, 

 arranged roughly in a single row on attachment surface. 



94. Cnemidocarpa personata (Herdman) 



Figure 78 



Styela personata Herdman, 1899, p. 41, pi. Cyn. 15, figs. 1-7. 



Styela ctltcridgii typical "personata" form, Kott, 1952, p. 220, figs. 19-20. 



MATERIAL EXAMINED 



Australia : Port Jackson. William Stimi>son, North Pacific Exploring Exped., 

 1853-56, sta. SH 142. Two specimens (USNM 11758), on Hcrdmania momns f. 

 grandis (Heller) (USNM 11767). 



Description. — The two specimens examined were found attached 

 to a giant specimen of Herdinanm inomus f. grandis (USNM 11767) 

 from Northern Australia. Specimens measured 22 mm. and 28 mm. 

 in length, were attached by right ventral side in the smaller, and by 

 whole ventral side in the larger specimen. Test leathery but thin, 

 yellowish brown, irregularly grooved on surface. Branchial aperture 

 subterminal, atrial aperture situated with anterior margin located at 

 or near middle of body ; both apertures nearly sessile as siphons are 

 extremely short. Inner surface of test whitish. Mantle of a moderate 

 thickness, yellowish brown. Numerous endocarps on inner surface, 

 fine atrial tentacles along the inner base of atrial siphon. 



In branchial sac imier longitudinal vessels in the 22 mm. long speci- 

 men arranged (D = dorsal,V= ventral) : 



Left D (33) 3 (20) 7 (21) 7 (16) 5 V 



Right D 6 (20) 5 (20) 6 (18) 6 (15) 3 V 



Transverse vessels arranged: thick thin thin thin medium thin tliiii 

 thin thick. Parastigmatic vessels present; 3 to 5 stigmata in each 

 mesh. Tentacles about 30, large and small alternate regularly. Cili- 

 ated groove U-shaped, with one ami incurled. A parasitic copepod 

 found in branchial sac of one specimen. 



