10 F. A. SMITT, 



Fil. bryozoarium ramosum, ramis teretibus, superficie anteriori zooeciis decumben- 



tibus ornata; zooeciis glabris, minutissime punctåtis, apice tubuliformi magis 



minusve erecto prasditis, seriatis vel sparsis; superficie stirpis posteriori con- 



vexa atque longitudinaliter sulcata; 



with almost the same words as that given by Stoliczka in the definition of Filisparsa 



orakeiensis. The most important difference is expressed in the ramis teretibus instead 



of depressis. 



The only specimen — but this a very good one — that was sent me for examina- 

 tion, was brought up by Pourtales from 60 fathoms, southwest off Tortugas. In the 

 neigbourhood of the Azores I have seen a little fragment very like this species. 



Of the genus Hornera, the Floridan collection contains two specimens of a very 

 beautiful and easily characterized species, that I have nowhere seen described, 



Hornera galeata (Pl. IV, figs. 23 — -25). 



Char.: Stirps erecta, flavido-eburnea, ramosa, ramis in uno piano positis, striata, 

 striis perlucide poris punctåtis, vel deraum granuloso-porosa, striis calci- 

 ficatione evanescentibus, zooecia praebet minima (apertura cura peristomate 

 = 0,12 mm.) omnino fere occulta, quorum apertura peristomate elevato 

 superne tegitur, ooecia in superficie posteriori posita prssbet rotunda, ver- 

 rucis aculeata. 

 Hab.: Specimina duo e 183 orgyis sustulit Pourtales ad Floridam mense Maji 



1868. 

 It is one of the smaller Horneros, almost of the size and general appearance of 

 the H. violacea, but with smaller and fewer zooecia, 3 or 4 in the breadth of the stem, 

 which gives it a totally different aspect under the microscope. Yet the resemblance 

 to that species is more evident on the back side, especially in the higher degrees of 

 calcination, when the furrows are dissappearing from the limits of the zooecia and the 

 smooth or very tinely granulated surface presents the pores in an irregularly quincun- 

 cial order. Even the ooecia remind one of the descriptions thereof on H. violacea, 

 given by Särs and Norman, except that they are verrucose and round instead of smooth 

 and elongate. The most of them, on our specimens, are broken, and then we see a 

 round opening, much greater than that of the zooecia, overwhelmed by a usually den- 

 tated lamel. 



The height of the tigured stem (fig. 23 and 24) was 8 mm.; the breadth of 

 the lowest part of the stem 0,:>, the breadth of the branches 0,:>ä mm. 



In the same manner as the Proboscina (Aud., mihi), in its colonial development, 

 "akos its origin among the creeping Tubuliporido?. (Alecto) *), so also are the 



PUSTULIPORI1XE 

 shown by Hincks 2 ) to stånd in the same relation to a similar origin. Hence these two 

 groups are to be placed very near each other in the genealogical system, although as 



*) Krit. Fört., öfvers. Vet.-Akad. Förh. 1866, p. 458 etc. 



2 ) Cat. Zooph. S. Dev. S. Cormv., Ann. Mag. Nat. Hist., ser. 3. vol. IX, p. 306. 



