REPORT ON THE HEXACTINELLIDA. 443 



genera witliin this group it is striking that in the Pacific alone 5 species of Eurete 

 were found, while this genus did not occur once in the other two oceans. 



Mseaudrospongidse were represented only in the Atlantic and Pacific, in each by 2 species. 



Further details as to the separate genera and species yield the following results. 

 The genus Euplectella was found in the Atlantic and Pacific, but not in the Indian 

 Ocean. The beautiful Euplectella aspergillum was only obtained at the one familiar 

 locality, namely, at the Philippine Island, Zebu. Euplectella crassistellata was also 

 found in the Pacific, but at a great distance from the mainland. Eu2:>lectella suberea 

 and Euplectella nodosa appear to be restricted to the Atlantic. 



In each of the three oceans one or two representatives of the genus Holascus were 

 discovered. Malacosaccus was found at one locality in the Atlantic, and in the Indian 

 Ocean. The two Tasgerinse occur in the Pacific ; Twgeria pulchra near the Fiji Islands, 

 and Walteria flemmingii ofi" Kermadec. 



Of Asconematidas, only one species, namely, Sympagella nux, was found in the 

 Atlantic, near the Cape Verde Islands ; four species in the Indian Ocean, viz., Poly- 

 rhahdus oviformis, Aulascus johnstoni, Balanites pipetta, and Caulophacus latus, and 

 two in the Pacific, namely, Caulophacus elegans to the east of Yokohama, and the 

 peculiar Trachycaulus gurUttii in the middle of the South Pacific. 



While the Rossellidse were represented in the Atlantic region only lay the small 

 Lanuginella pupa, found ofi" Little Ki Island, and by Polylophus 2^hil{pp>inensis, near the 

 Philippine Island, Zebu, Rossella antarctica was found both in the South Pacific and in 

 several regions in the South Indian Ocean, and in especial abundance near Kerguelen. 

 Of the genus Acanthascus, one species, Acanthascus grossularia, was found in the Indian 

 Ocean, the other, Acanthascus dubius, in the Pacific portion of the Magellan Strait. 

 The species of Bathydorus are similarly distributed in the same two oceans, Bathydoi-vs 

 spinosus occurred in the Indian Ocean, near the Crozet Islands ; Bathydorus fimhriatiis, 

 Bathydorus baculifer, and Bathydorus stellatus, in the Pacific, the first in the North 

 Pacific at two localities, Bathydorus bacidifer in the middle of the South Pacific, and 

 Bathydorus stellatus in the Magellan Strait, where Rhabdocalyptus ra-peri also occurred. 

 All the four Challenger species of Crateromorpha were found in the Pacific, Cratero- 

 morpha meyeri from the neighbourhood of the Philippine Island, Zebu, Crateromorpha 

 thier/elderi and Crateromorpha murrayi ofi" Little Ki Island, and Crateromorpha 

 tumida ofi" one of the Banda Islands. The species of Atdochone were also obtained 

 in the Pacific, Atdochone cylindrica from the Kermadec Islands, and Atdochone 

 lilium from the Philippines. On the other hand, Caulocalyx tener was found in 

 the middle of the South Atlantic, and Atdocalyx irregularis both in the Atlantic 

 near the Bermudas, and in two localities in the South Indian Ocean, namely, near Prince 

 Edward Island and ofi" the Crozets. Finally, the Dictyonal-like Euryplegma auricxdare 

 was found in the Pacific near the Kermadec Islands. 



