CRATEROMOEPHA CORRUGATA. 79 



About fifteen specimens in all have passed tlirough my 

 hands. ISTo doubt they all came from the Sagami Sea ; a more 

 exact statement of locality can l)e made only in the cases of five 

 specimens from Outside Okinosé by the Iwado-line (200-oOü fms.) 

 and of one from a spot in Döketsba (100 fms.). The latter speci- 

 men, together with Euplectella m'irs//al/i, Mttacrinus rotundus, etc., 

 was obtained by Professor Mitsukuri in one of his excursions 

 on the " Gülden Hind." 



At first sight the species may appear not unlike C. meyeri 

 tuherosa or rugosa (PI. VI., fig. 6). The general shape of the 

 body is that of a bowl of irregular contour, broadest at the base, 

 the central portion of which passes below into the stalk. The 

 periphery of the body-base may somewhat overhang the insertion 

 of the stalk. 



The external surface of the body proper is very peculiarly 

 characterized. Though it looks much the same as in C. meyeri 

 along the thin smooth oscular border, the greater part of it pre- 

 sents a nuich folded or corrugated appearance. The rounded and 

 quite irregular folds causing this appearance may at once be dis- 

 tinguished frDUi tlic simple j'rotuberances of G. meyeri tuberosa 

 or from the wrinkled irreguhirities of C. meyeri rugosa. Between 

 the folds are furrow like or 2:)it-like depressions; many of tiiese 

 are shallow and plainly show the cul-dc-sac bottom, while others, 

 esj)ecially the pit- like ones, are frequently deep and may even 

 be so deep and canal-like that their course can be followed only 

 by introducing probes or by cutting open the wall. And among 

 such deeply penetrating pits or canals there invariably exist some 

 that internally freely intercommunicate with others of the kind. 

 The canals may divide in their course and the branches may by 

 anastomosis from a tunnel-system that opens externally by more 



