THE COLLECTIOlir 01" MISS H. &ATTT. 135 



corrugations, opening by a circular orifice, which is surmounted 

 by an acrocyst. 



Locality. Cape of Good Hope. 



This is a minute but interesting species. It attains a height 

 of about 5 of an inch, and was found creeping over the surface 

 of a seaweed. It is rendered remarkable by the fact that all the 

 bydrothecae are borne directly by the stem without the inter- 

 vention of pinnge. The creeping fibre, however, by which the 

 colony is attached may probably be regarded as a prostrate 

 creeping stem, and then the free portion, which carries the 

 hydrothecse would represent the pinnae. The species is further 

 distinguished by the secund disposition of the hydrothecse, by 

 their membranous rim, and by the nearly globular gonangia 

 vdth their acrocysts. 



Sertulaeella teimucronata, n. sp. (PI. X. figs. 1, 2.) 



Trophosome. — Stem pinnate, monosiphonic, springing at inter- 

 vals from a creeping filament ; pinnae alternate. Hydrothecae 

 borne both by stem and pinnae, deep, nearly cylindrical ; orifice 

 with three strong teeth, two of which are situated anteriorly and 

 one posteriorly ; hydrothecae of pinnae with their axis all directed 

 towards the same side. 



Gonosome. — Gronangium sessile on the side of an internode 

 near the base of the hydrotheca, oviform, marked by shallow 

 annular rugae, opening on the summit by a narrow, slightly 

 elevated orifice. 



Locality. Australia. 



This is a very slender and delicate form. It attains a height 

 of about 1 inch ; and is characterized by its deep, nearly cylin- 

 drical hydrothecae with tricuspid margin and secund disposition, 

 and by its large, broadly oviform, and narrow-mouthed gonangia. 



Sertulaeella teochocarpa, n. sp. (PI. X. figs. 3, 4.) 

 Tropliosome. — Main stem monosiphonic, and carrying piuuately 

 disposed ramuli with every internode supporting two alternate 

 hydrothecae. Hydrothecae rather wide, adnate for about two 

 thirds of their height to the internode; orifice with two long 

 acute teeth on the apocauline and a single wider tooth on the 

 epicauline side. 



Gonosome. — Gronangia springing each from a point just below 

 a hydrotheca, amphora-shaped, surrounded from base to summit 

 with very regular, close-set, annular ridges, and terminating 



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