JAPANESE CHEILOSTOMATOUS BRYOZOA. 



423 



20 BuyuUi jolmstoniœ (Gray). 



Halophila johnstonicc, Gray 1848, Cat. Brit. Anim. — Busk 1875, Cat. Brit. Mus. 

 Foly., I, 43, pl. xxx. — Smitt 1S72, Flor. Bry., I, 17, pl. v. 



Bttgula longissima, Busk 187g, Chall. Rep., vol. X, pt. XXX, 42, pl. xxxi, fig. 7. 

 Bitgula johristoniœ, Ortmann 1S90, Jap. Bry., 24, pl. i. fig. 16. 



Numerous large colonies of the above species from following 

 localities in Sagami Sea : off Niijima ; off Odawara (93 fms.) ; Yodomi 

 (78 fms.) ; Mochiyama (312 fms.). 



21. Utiyula lasca Robertson. 



Bugida /axa, Robertson 19^5, Univ. Calif. Pub. Zool., vol. II, 275, pi. xii, figs. 

 61, 62. 



A few small colonies in the collection is referable to the above 

 species. They were collected at Okinosé from a depth of 234-312 fms. 

 The oral spines are characteristically developed. On all young, as also 

 on all marginal, zocecia, there are usually two spines on each side of 

 the aperture, and those of the two sides arch over the aperture. The 

 same spines in the older zocecia of intermarginal rows number 3 or 4 

 on each side. A large number of rootlets, by means of which the 

 colonies are attached to the substratum, arise from the outer frontal 

 angle of proximal zocecia on the dorsal side. The Californian speci- 

 mens, on which Robertson based the species, were without avicularia ; 

 whereas, the specimens now before us exhibit avicularia on all inter- 

 marginal zocecia, and occasionally on some marginal zocecia also. The 

 avicularia of marginal zocecia are much larger than those of others. In 

 this respect, the present species resembles B. murrayana (J.), but differs 

 from it in the shape of avicularia. The species also closely agrees with 

 B. japonica Ort., but there exists difference between the two in the shape 

 of zocecia and in the stronger apertural spines of the former. 



