JAPANESE CIIEILOSTOMATOUS 1ÎRYOZOÀ. 



417 



are mostly entirely destitute of the spine in question. On the other 

 hand, we have noticed that, while in C. lata, the zoœcial aperture is 

 elliptical and simply margined, in the specimen under consideration of 

 C. climacina it is of a somewhat quadrangular shape with rounded 

 corners and exhibits a small mucronate-like projection in the middle 

 of its lateral margins Further, we find in the specimen that frontal 

 avicularia are directed upwards, — -not obliquely downwards as in C. lata. 



12. Cahevea darivinii Busk. 



Caberea darivinii. Busk 1884, Chall. Rep., vol. X, pt. XXX, 29, pi. xxxii, fig. 

 6.— McCoy 1S87, Prod. Zool. Vict., decade XIV, 141, pi. exxxvii, figs. I & 5. — 

 Waters 189S, Journ. Linn. Soc, XXVI, 10, pi. i, figs. 13, 21-25. 



There exists in the collection a moderately large colony which 

 may be identified with the above species. It was obtained from a 

 depth of 100 fms. at Yodomi in the Sagami Sea. In this specimen, 

 there always exists a single oral spine on the outer side of each 

 zocecium, instead of two as in the specimens hitherto known. 



13. Caberea tueaaèet'as. n. sp. 



Pl. VI., fig. 5 ; textfig. 5. 



Zoarium a flabellate tuft, 25-50 mm. high, with delicately textured 

 surface. Branches dichotomously dividing at rather wide intervals. 

 Zocecia biserially arranged, elongate, nearly uniformly wide throughout 

 length ; their aperture orbicular, occupying about half the front of 

 zocecium, with broad, minutely granulated and outwardly recurved 

 margin ; the margin armed with four spines, of which three are at the 

 upper outer angle and one on the upper inner. Scutum ovate. Lateral 

 avicularia wanting. Frontal avicularia dimorphic : on zocecium partially 

 covered over by the oœcium of the next lower zocecium, the avicu- 

 larium is usually small and is turned to one side of the aperture, with 

 the triangular mandible directed upwards ; while on freely exposed 



