PACIFIC TUNICATA OF U.S. NATIONAL MUSEUM 173 



8 mm. long imlividual 

 (10) 3 (12) 2 (11) 

 (9) 2 (12) 2 (10) 



27} mm. long individual 

 (15) 3 (13) 3 (13) 

 (10) 4 (13) 4 (13) 



Transverse vessels alternate with parastigniatic vessels in the 8 mm. 

 long individual or may be arranged — thick p thin p thm p tliin p 

 thick — in the 25 mm. long individual (p represents parastigniatic 

 vessel). Four to five elongated stigmata in each mesh, although they 

 may be up to 8 in larger meshes along endostyle. Tentacles 18 in the 

 8 mm. long specimen, while up to about 30 in the 25 mm, long speci- 

 men. Ciliated groove U-shaped and sometimes with incurled horns in 

 smaller specimens. Alimentary canal located in rear part of body 

 posterior to atrial aperture ; the larger the body size, the smaller the 

 relative size of alimentary canal. Second intestinal loop very shallow, 

 rectum short. Stomach oval, with about 15 longitudinal plications on 

 surface, a small caecum at inner pyloric corner. Anal margin divided 

 into several lobules. Gonads quite immature in small Saipan 

 specimens. 



86. Polycarpa cryptocarpa (Sluiter) 



Figure 71 



Styela cryptocarpa Sluiter, 1885, p. 210 pi. 7, figs. 1-3. 



Polycarpa cryptocarpa Hartmeyer, 1906, p. 17. — Hastings, 1931, p. 75. — Tokioka, 

 1950, p. 139, figs. 16-17 ; pi. 10, figs. 2-3. 



MATERIAL EXAMINED 



Palau Island : Iwayama Bay, east side of Oyster Pass. GVF sta. 220. Two 

 specimens (USNM 11411). — Iwayama Bay, mouth of Oyster Pass. GVF sta. 236. 

 One specimen (USNM 11422). — Fringing reef of small island in lagoon 

 (Meharehar of Eil Malk. GVF sta. 252. Oue specimen (USNM 11433). 



Solomon Islands : New Georgia Island ; cliff 5 ft. below surface, near Munda 

 Airport. W. G. litis, sta. 38, October 17, 1944. One specimen (USNM 11522). 



Gilbert Islands : Onotoa Atoll ; P. E. Cloud, sta. GOC 51. Four specimens 

 (USNM 11510).— Onotoa Atoll; P. E. Cloud, sta. G0O55. Two specimens 

 (USNM 11509) and one specimen (USNM 11513).— Onotoa Atoll; A. H. Banner, 

 coll., July 29, 1951 ; depth, 10-20 ft. Three specimens, attached to dead coral 

 (USNM 11519). 



Marshall Islands : Bikini Atoll ; lagoon, 180-200 ft. L. I'. Schultz, sta. S-46- 

 44, March 29, li^O. Oue specimen ( USNM lllM ) . 



Description. — A total of 18 specimens were dissected for examina- 

 tion. The largest is 80 mm. in length. Body somewhat compressed 

 laterally as shown in following measurements: 75 mm. in length, 

 50 mm. in width, 20 mm. in lateral thicloiess. Animals usually at- 

 tached to substratum by posterior part of body, which may rarely be 

 prolonged into a peduncular protuberance, as is seen in a 35 mm. long 

 specimen from the Gilbert Islands, in which the posterior portion of 



