REPORT ON THE HEXACTINELLIDA. 289 



infundibularis, Carter), Farrea gassioti, Bowerbank, and Farrea pocillum, Bowerbank. 

 The last of these three forms [Farrea pocillum, Bowerbank) certainly does not belong to 

 the genus Farrea, as Bowerbank's figures ' and description clearly show. On the other 

 hand, Farrea infundlbuliformis, Carter, and Farrea gassioti, Bowerbank, may quite 

 possibly belong either to the genus Farrea itself or to some related genus within the 

 family Farreida^. I only desire to direct the attention of specialists to this funnel-shaped 

 Farreid, for such at least the fragment figured in PI. LXXVI. certainly is. 



Subtribe 11. Scopularia (Carter), F. E. Schulze (Pis. LXXVII.-XCVIIL). 

 Besides the pentact hypodermalia and hypogastralia, radially disposed scopulae occur. 



Family L Euretid^, F. E. Schulze (Pis. LXXVII.-LXXXIL). 



Branched and anastomosing tubes, which either form an irregular framework with 

 tubes of almost uniform width, or else the wall of a cup. The dictyonal framework 

 exhibits from the very first more than one layer, so that a single layered network of 

 strands never occurs at the ends of the tubes. 



Genus 1. Eurete (Semper), Carter (Pis. LXXVII.-LXXIX.). 



1868. Semper, Verhandl. d. Wiiizburg. phys.-med. Gesellsch., Sitzungb. vom July 18. 



1875. Marshall, Zeitsclir. f. wiss. Zool., Suppl., Ed. xxv. p. 181. 



1876. Marshall, Zeitschr. f. wiss. Zool., Ed. xxvii. p. 113. 



1877. Carter, Ann. and Mag. Nat. Hist., ser. 4, vol. xix. p. 112. 



1877. Zittel, Abhandl. d. k. baier. Akad. d. Wiss., Bd. xiiL Heft 1, p. 1. 

 1880. 0. Schmidt, Die Spougien des Meerbusens von Mexico. 



History. — In the Transactions of the Physico-Medical Society of Wiirzburg, 1868, 

 there occurs, in the report of the session held on 18th July 1868, the following notice : — 

 " Mr. Semper showed some new siliceous sponges from the Philippines. One is a new 

 species of the genus Hyalonema, and another may be regarded as a type of a new genus 

 Eurete." " The genus Eurete was established for a sponge, having the form of a 

 coral, the cylindrical and hollow branches of which are everywhere united to one another. 

 The wide openings at the extremities of the branches seem to be exhalent, the fine 

 pores between the network, which constitutes the walls of the tube, are apparently 

 inhalent. The tissue of the wall of the tube — which measures about 1 mm. in thickness 

 — is composed of a tolerably dense network of fine siliceous tubes, which are sometimes 



I Proc. Zool. Soc. Land., pi. xxxix. fig. 48, 1875. 

 (zool. chall. EXP.— part uii. — 1887.) Ggg 37 



