/8 ART. 7. 1. TJIMA : HEXACTINELLIDA, IV. 



fore it is scarcely possible to discriminate any one of the under- 

 lying diactins as being hypoderinal and not parenchymal. 



The dermalia, so far as I have seen, are all small rough 

 pentactins, exactly comparable to the same of G. mej/eri. They 

 do not form a distinct dermal la ce work, being closely adherent 

 to the tissues below. The gastraUa, which are likewise lOugh 

 pentactins, also show no noteworthy point of diaerence from the 

 same ot C. mei/eri. 



The same may further be said of the hexasters of this 

 species, so that I need not enter into a description of them be- 

 yond making the following cursory remarks. 



The oxyhexaster is abundantly present in all parts of the 

 parenchyma. Diameter, 80-100 /a Number of terminals to each 

 principal, 2-4. 



The microdlscoliexüstcr is common in the parenchyma gene- 

 rally. Diameter, oS-50 //.. The figure of this rosette given in 

 PI. IV., fig. 9, from (J. itieiferi tuberosa, may pass equally well 

 as that of one from the present species. 



CRATEROMORPHA. CORRUGATA Ij. 



PI. VI., figs. 1-8. 



Craleromorplia corrugata. I.iima, '98, p. 49. 



I consider thi& as a very well characterized species, which, 

 unless the specimen to be identified is too imperfectly preserved, 

 can be easilv recognized. 



