636 Cl. Hartlaub, 



Sertularella ßliforniis Allm. 1888. 



Sertalaria ßliformis Allm., in: E.ep. sc. Res. Challenger, V. 23, p. 51, 



tab. 24, fig. 1, la. 

 Sertidaria gracüis Allm., ibid., p. 51. 

 Sertularella füiformis Haetl. 1900, Rev. d. Sertularella-Arten, p. 101. 



Allman's Beschreibung- lautet: 



„Trophosome. — Stern nionosiphonic, slender, profusely branched; 

 primary ramification pinnate or subpinnate, many of the. primary 

 and secondary branches presenting a similarly pinnate or subpinnate 

 ramification. Hydrothecae alternate, distant, one borne on every 

 internode. nearly cylindrical. adnate to the internode for about two 

 thirds of their height, then bending outwards; orilice with a broad 

 cusp on each side. 



Gonosome. — Gonangia springing each from a point just below 

 the base of a hydrotheca, urniform, with very prominent annular ridges, 

 distal end continued as a narrow cylindrical tube, which carries the 

 even, circular orifice on its summit. 



This slender and very elegant species was brought up in 

 luxuriant masses about flve inches in height, and richly laden with 

 gonangia. The ramification, which is very profuse, commences with 

 pinnately disposed branches, many of which soon brauch in a similar 

 way, and the primary ramification is further repeated in ramuli of 

 a secondary, tertiary, and even higher order. The branches are 

 given off each close to the base of a hydrotheca. 



The gonangia are very beautiful. The regularity and prominence 

 of the annular ridges constitute a feature in the highest degree 

 attractive. The distal end is prolonged into a short, wide neck, 

 which terminates in a saucer-shaped. summit, from the centre of 

 which rises a narrow, cylindrical tube, which carries the relatively 

 small orifice of the gonangium. 



The annular ridges, which are very prominent on the apocauline 

 or outer side of the gonangium, are nearly obsolete on the inner or 

 epicauline side, a condition which is obviously connected with the 

 close proximity of this side to the opposed surface of the stem. 



Sertularia gracüis has considerable resemblance to SerUüaria 

 tricuspidata, Alder. It difters from it in the absence of annulation at 

 the distal side of every hydrotheca, in the hydrothecae having only 

 two marginal cusps, and in the more elongated gonangia." 



