1855.] 377 



15. Edwardsia. rubricollum. Subclavate, attached to stones beneath the 

 surface of the sand ; body covered with a loose brownish epidermis except at a 

 red band beneath the tentacula, the upper margin of which is tuberculated ; 

 mouth-disc pale yellow ; mouth deep red ; tentacula yellowish, stout, tapering 

 to a point, about 40 in number, arranged in two rows ; half as many in the inner 

 as in the outer row. Length 4 inches. 



Hab. China. 



16. Edwardsia cretata. Body covered with a brownish epidermis, encrusted 

 with sand; anterior extremity naked, striate, and striped with alternately broader 

 and narrower streaks of white ; tentacula slender, pointed, black, spotted with 

 white along their inner sides, about 30 in number, the inner ones lougest. Length 

 1 inch. 



Hab. Japan. 



TUNICATA. 



17. Ascidia tubifera. Elongated, cylindrical, smooth, hyaline, pale greenish, 

 attached at the small anterior extremity ; branchial tube nearly as long as the 

 body, with a trumpet-shaped aperture, 8-lobed, with 8 red ocelli and the same 

 number of short cirri; anal tube half a3 long as the branchial, with a contracted 

 aperture, 6-lobed and 6-ocellate ; both apertures encircled by a thread of bright 

 yellow. Length 2 inches. 



Hab. China. 



18. Ascidia calcata. Oblong, somewhat rectangular, flattened, papillose, 

 dark-green ; apertures small, sessile on 8- and 6-lobed prominences, encircled 

 with darker green. Length \\ inch. 



Hab. Japan. 



SCHIZASCUS, n. g. Tunica exterior fissa ; parte posteriore complanata, 

 cavum alterius tamquam operculo claudente et biphones retractoscelante. Aper- 

 turae sexangulatae. 



19. Schizascus pellucidus. Ovate-triangular when contracted ; test and 

 opercular thick, hyaline ; tubes short, flesh-colored, streaked with crimson ; a 

 few transparent tubular processes around the apertures. Length 1 inch. 



Hab. China. 



20. Schizascus papillosus. Subrectangular, transparent ; test covered with 

 small papiiias ; apertures with salmon-colored ocelli at their angles. Length f 

 inch. 



Hab. China. 



21. Molgula labeculifera. Small, globular, encrusted with mud; tubes 

 transparent, the branchial shortest; apertures 6- and 8-lobed; lobes pointed 

 and covered with sordes at their extremities. Diameter f inch. 



Hab. China. 



22. Cynthia satsumensis. Subglobular, smooth when young, corrugated and 

 distorted with age, of a pale orange or flesh-color; tubes short, subconical, 

 rounded ; apertures 4-lobed, with deep red markings, the anal one-third the size 

 of the branchial. Diameter 1 inch. 



Hab. Japan. 



23. Cynthia delicatula. Globular, nearly smooth, of a pale red color ; tubes 

 short, subcylindrical ; the branchial one with four longitudinal, bluish-white 

 stripes margined with dark red ; apertures nearly equal in size, rounded in ex- 

 pansion, cross-shaped when closed ; a red circle at the mouth of the branchial 

 cavity. Diameter f inch. 



Hab. Tanegasima. 



24. Cynthia ocellifera. Body rounded, coriaceous, of a pale red color with 

 darker clouds ; tubes large, rather produced, about equal in size, striped alter- 

 nately with red and white toward their extremities ; branchial aperture somewhat 



