60 UNITED STATES NATIONAL MUSEUM BULLETIN 251 



Stigniatal rows 17, and about 15 (?) stigmata in eacli row. No 

 papillae along transverse vessels. About a dozen tentacles, besides 

 some smaller ones ( ? ) . Ciliated groove a longitudinal slit. Dorsal 

 languets finger-shaped and arranged along the dorsomedian line. 

 Anus opens at the dorsoposterior corner of brachial sac. Stomach 

 elongated and situated near the posterior end of the intestinal loop 

 approximately at middle of region containing both abdomen and post- 

 abdomen, separated from rear end of loop by distance of stomach 

 length; surface marked with 8 longitudinal plications, also 2 typh- 

 losolis. Hind stomach defined distinctly, but region of middle intes- 

 tine quite obscure. Two groups of testicular follicles, each consisting 

 of only a few follicles, found posterior to intestinal loop. Pleart sit- 

 uated at level of posterior one-third of postabdomen. Distal end of 

 postabdomen somewhat swollen where it contains corpuscles densely ; 

 nine small knobs found around base of swollen portion. 



Kemarks. — Euherdnmnia claviformis (Ritter) from the California 

 coast has about 12 stigmatal rows and up to 40 stigmata in each row, 

 therefore fewer rows and many more stigmata in each row than in this 

 species. These differences are considered, at present, to be too remark- 

 able to be regarded as intraspecific variations. 



18. Polyclinic! in strobilization (?) 



Figure 19 

 MATERIAL EXAMINED 



Korea Straits : Albatross sta. 4876. One specimen (USNM 11813). 



Description. — The single colony is roughly ovoid in shape, about 10 

 mm. in height and attached to the substratum by a slightly narrowed 

 basal end. 



Test very soft, gelatinous, and pale yellowish brown; encrusted 

 with sand grains on the surface, but not impregnated. No 

 system found in arrangement of zooids. Zooids less than 5.2 mm. in 

 length and all in a degenerated state, respective parts of zooids dif- 

 ficult to discern properly. Probably anteriormost elongated and 

 tapering part, about 1.2 mm. in length, is atrial languet, and following 

 thickest portion, about 3 mm. in length, may represent thorax proper, 

 on which about 20 rows of rudimentary or vestigial stigmata are seen 

 faintly. Both branchial and atrial apertures obscure, although 

 branchial aperture may be situated just anterior to stigmatal rows. 

 Next segment approximately 1 mm. in length, striated faintly with a 

 few longitudinal muscles (?) and followed by a short sausage-like 

 part. The former may represent the abdomen and the latter a part of 

 the postabdomen. A small prominence found at the juncture of 

 thorax and abdomen on the dorsal ( ? ) side is considered to represent 

 either the anus or a vestige of the retractile muscle of the thorax. 



