•422 THE VOYAGE OF H.M.S. CHALLENGER. 



From this it appears that in 1873 six specimens were known from the neighbourhood 



of Portugal, viz 



1. Asconema setuhalense, Sav. Kent. 



2. Hijaloiiema ludtanicum, Bocage. 



3. Pheronema ijraiji, Sav. Kent. 



4. Fan-ea sp. 



5. ApTirocallistes hocagei, "Wright. 



6. Fieldinrjia lagettoides, Sav. Kent. 



from the PhiHppiues six species were also known, viz.: 



1. Eupledella aspergiUum, Owen. 



2. PohjlopliMS pliilipjnnensis, Gray. 



3. Crateromorpha meyeri, Gray. 



and from the West Indies five species :- 



4. Pheronema Tiemisplixrieum, Gray. 



5. SempereUa sclmltzei, Semper. 



6. Eurete sp. {simpKcissima, Semper). 



1. Phcronetna annx, Tueidj. I 3. Dadylocalyx pumiceus, Stutchhuij. 



2. {Farrea ?) infundibularis, Carter. | 4. MyUusia callocyatMis, Gray. 



5. Aulocystis grayi, Bowerbank. 



and lastly, one or two species from widely separated localities. 



From a list published a few years ago by Marshall,^ in which several additional forms 

 were included, and a few bathymetrical data were also furnished, the author drew the 

 following conclusions (oj:>. cit., p. 151) : — "From this survey it is seen that the Hexac- 

 tinelhda have a horizontal distribution from about 65° north latitude to about 50° south, 

 and a vertical distribution from about 500 to over 4000 fathoms. It may seem striking 

 that several localities have yielded a relatively large number of Hexactinellid species, e.g., 

 Portugal, Florida (and the West Indies), and the Philippines, but it must be noted that 

 the two first regions have been specially explored by deep-sea expeditions, while the 

 Philippines are the home of an exceedingly keen fishing folk, who are wide awake to the 

 fact that any new form means gold to the finder." 



Without entering on any detailed review of the several reports which have been made 

 on the distribution of the HexactineUida, I shall tabulate all the trustworthy and definite 

 notices of locality with which I am acquainted, so far as they refer to sufiiciently defined 

 species. The first of the two synoptic tables is arranged zoologically according to my 

 system, the second according to the localities. I have further marked all the localities on 

 the accompanying map of the world. In this way the state of knowledge independent 

 of the results of the Challenger Expedition is clearly indicated. 



1 Zdtschr. f. wiss. Zool., 1875, Bd. xxv. Suppl., p. 150. 



