20 EUPLECTELLA. — HOLTENIA. 



Euplectella aspergillum, Owen. 



Euplectella asperrjillum, C. G\a,\x^,\JehQV Euplectella aspergillum, Marburg (1868). 

 Euplectella aspergillum, W. Marshall, " Untersuchungen iiber Hexactinelliden," 



Zeitschrift fiir wissenschaftliche Zoologie, Band xxv. Supplement, Seite 



142 (1875). 

 Euplectella aspergillum, W. Marshall, " Ideen iiber die Verwandtschaftsverhalt- 



nisse der Hexactinelliden," Zeitschrift f lir wissenschaftliche Zoologie, Band 



xxvii. Seite 113 (1876). 

 Euplectella aspergillum, R. Owen, " New Genus and Species of Sponges," Pro- 

 ceedings Royal Society London, vol. ix. pp. 3-5 (1841). 

 Euplectella aspergillum, E,. Owen, " Description of a New Genus and Species 



of Sponge," Transactions Zoological Society London, vol. iii. part 2, 



p. 203, tab. xiii. (1843). 

 Euplectella aspergillum, F. E. Schulze, " On the Structure of the Soft Parts of 



Euplectella aspergillum, Owen," Transactions Royal Society Edinburgh, 



vol. xxix. p. 661, tab. A (1880). 

 Euplectella aspergillum., E. E. Schulze, Report on the Hexactinellida, Reports 



of the Results of the Voyage of H.M.S. ' Challenger,' vol. xxi. p. 64 (1887). 



Geographical Distribution. — Philippine Islands. Off the coast of 

 Portugal. 95-100 fathoms. 



Eamilia ROSSELLID-ffi. 



Euplectellidse the dermalia of which have no centripetal ray. 



Genus HOLTENIA. 

 Monozoic, sac-shaped Rossellidee, with or without oscuhini, 

 always without peristomal apparatus. Root-tussac irregular and 

 only slightly developed. Besides the typical hexaradiate spicules 

 there are some with only five rays, besides those with four rays. 

 Pappus-shaped termini to the defensive spicules. Cloacal cavity 

 clothed with hexaradiate spicules. 



Holtenia pourtalesii, Schmidt. 



Iloltenia pourtalesii, W. Marshall, "' Ideen iiber die Verwandtsehaftsverhalt- 

 nisse der Hexactinelliden," Zeitschrift fiir wissenschaftliche Zoologie, Band 

 xxvii. Seite 113 (1876). 



Holtema pourtalesii, O. Schmidt, Grundziige eiuer Spongienfauna des atlaa- 

 tischen Gebietes, Seite 14 (1870). 



