JAPANESE CHEILOSTOMATOUS BRVOZOA. 



425 



rounded knob, similarly as in the typical iorm. The rootlets arise from 

 the dorsal surface of intermarginal zoœcia in the lower parts of zoarium. 

 They terminate each with an elliptical expansion, with which they 

 adhere to the substratum. 



This form occurs in considerable abundance in the shallow water 

 of Aburatsubo, close to the Misaki Marine Station. 



24. Bug ulti scaphoides Kirkpatrick, var. constricta, n var. 



Pl. Vii, fig. 7. 



Bugula scaphoides, Kirkpatrick 1890, Ann. Mag. Nat. Hist., 6. V, 18, pi. iv. 



The specimens from a depth of 350 fins, at Meranosé in the Sagami 

 Sea seem to be a form of B. scaphoides K. They differ from the 

 typical form chiefly in the existence of an indentation on the 

 outer lateral wall of each zocecium near base, and in the shorter 

 spinous process at the outer angle of zocecial aperture. The variety 

 bears a strong resemblance to B. simiosa Busk, but differs from it by 

 the biserial zoœcia and the pedunculated avicularia. 



Kinetoskias Busk 1 88 1. 



25. Kinetosliias mitsul;ui'ii. n. sp. 



PI. VI. , fig. 1 1 ; textfig. 7. 



Zoarium consists of an umbellate or inverted-conical crown of 

 branches and of a long stalk. The crown, 30-40 mm. long, is made 

 ■ up of numerous, slender dichotomously dividing, main branches, which 

 can be traced down to a single primary zocecium. The branches 

 exhibit zoœcia in biserial arrangement ; in the preserved state they 

 may appear to form a simple tuft, but in reality lie In a plane so 

 rolled as to take the form of the wall of a funnel, with the primary 

 zocecium at the apex ; they are gently bent outwards at the distal 

 end, giving the funnel a somewhat out-flaring rim. The stalk, 60-75 



