THE ANNALS 



AND 



MAGAZliXE OF NATURAL HISTORY. 



[SIXTH SERIES.] 



'• per litora spargite museum, 



Naiades, efc cireiim vitreos eonaidite fontes : 

 Polliee virginco teneros h'lc earpite florea : 

 rioribus et pictum, divje, replete canistrum. 

 At vos, o Nymphae Craterides, ite sub undas ; 

 Ite, recurvato variata eorallia trunco 

 Vellite museosis e rupibus, et mihi conchas 

 Ferte, Dese pelagi, et piiigui coiiohylia aucco." 



N.PartheniiGianiiettasii Eel. 1. 



No. 7. JULY 1888. 



I. — On some neic Species o/'Uruguaja, Garter^ loith Remarks 

 on the Genus. By George Jennings Hinde, Ph.D. 



[Plate IV.] 



I AM indebted to the kindness of my friend Dr. H. Wood- 

 ward, F.R.S., for the opportunity of studying a specimen of 

 a freshwater sponge from the River Uruguay, brought to this 

 country by Alex. R. Mackinnon, Esq. The specimen proves 

 to be a new species of the genus Uruguaya, Carter, and it is 

 more particularly interesting from the fact of possessing well- 

 developed gemmules, which have not hitherto been discovered 

 in examples of this genus. In comparing the new species 

 with specimens of U. corallioides, Bowbk., sp., in the British 

 IVIuseum and elsewhere, I have ascertained that gemmules are 

 likewise present in a specimen referred by Mr. H. J. Carter, 

 F.E.S., to Bowerbank's species, but which appears to me to 

 be distinct from it; and I have further met with some 

 minute forms which appear to be yet undescribed. I pro- 

 pose in the present paper to refer to all the forms of the 

 genus from South America, and to discuss the validity of the 

 genus in view of the fact that some of the sponges included 

 in it are gemrauliferous. 



Ann, & Mag. N. Hist. Ser. 6. Vol. ii. 1 



