PACIFIC TUNICATA OF U.S. NATIONAL MUSEUM 101 



piiyan Island, the Philippine Islands. Test soft, gelatinous and trans- 

 parent, lacunae very spacious. About 7 stigmata in each stigmatal 

 row. From these characteristics it is clear that this does not belong 

 to Leptoclinum, macdonaldi (Herdman). Probably this is a frag- 

 ment of the colony of L. mitsiikurii (Oka) or L. calciforme Sluiter. 

 As the style of attachment is unknown in the present specimen, further 

 identification is impossible at present. 



Family Polycitoridae 



43. Clavelina fecunda (Sluiler) 



Figure 34 

 PodoclavcUa fecunda Sluiter, 10(M, p. 7, pi. 3, figs. 23-24. 



MATERIAL EXAMINED 



Palau Islands: Reef 1% mi. S. of Ngaremediu, east side of Urukthapel; 

 GVF sta. 227. Three spec-imens ( USNM 11448) . 



Description. — Three individuals from the Palau Islands were ex- 

 amined. They are respectively 12, 14, and 18 mm. in length and 

 found in a solitary state, although it is uncertain whether these in- 

 dividuals were connected by a stolon when alive or if isolation is their 

 natural characteristic. The animal is elongated, narrowed poste- 

 riorly, and attached to the substratum by the posterior end ; the basal 

 one-fourth of the body somewhat swollen, hardened, and thus dif- 

 ferentiated distinctly as a short peduncular portion. Test covering 

 body proper gelatinous but rather hard, slightly milky white, smooth 

 on the surface and transparent, while that of peduncular portion is 

 hard, yellowish white, translucent, wrinkled, and carries some foreign 

 matter on the surface. Zooids taken from test strongly contracted 

 in all specimens and only G.5 mm. in length; thorax and abdomen 

 nearly equal in length. Both apertures roundish and plainly mar- 

 gined. Anterior half of thorax nearly transparent except the an- 

 terior part of endostyle, dorsal ganglion, and a small roundish pig- 

 ment fleck situated on each side of the dorsal ganglion, all of these 

 deep purplish brown. Posterior half of the thorax and stomach 

 side of abdomen pigmented rather heavily. The coloration when the 

 animals were alive may have been bluish. 



Both branchial and atrial siphons very short, situated at the an- 

 terior side of the thorax ; about a dozen longitudinal muscles on each 

 side of thorax, all very strong. A very prominent incubatory pouch 

 formed on dorsoposterior part of thorax, and posterior portion of 

 pouch containing many fecundated eggs strongly projects from 

 thorax. In zooids examined, there are as many as 42 embryos and 

 fecundated eggs in various developmental stages. About 20 stigmatal 

 rows, 50-60 stigmata in each row. Tentacles in an examined zooid 

 14 in number, also a few minute ones; usually larger and smaller ones 



