342 Notes on Neio Species 



in soundings from Ycddo Bay, but this may have been an 

 accidental admixture. Its rarity is sufficiently attested by 

 the fact, that although seen in this locality six years ago, 

 it is still undescribed, and I believe unknown to most 

 microscopists. It is exceedingly beautiful, and difficult to 

 describe. In the lateral view the centre of the valve is 

 destitute of puncta, and is of a stellate form correspond- 

 ing to the number of cones, with which it is connected by 

 roof-like ridges. The striae are fine, and parallel to the 

 surface of the connecting ridges. A single valve very 

 closely resembles a crown. Only one species has yet been 

 noticed, in which the number of lateral projections varies 

 from six to ten, the usual number being seven. There is 

 also considerable diversity of size. 



Figs. 60 and 61. Triceratium Shadboltii, Bail., nov. 

 sp. ? Sides concave ; in front view constricted beneath the 

 processes ; concave sides decussately punctate ; lateral 

 surface bearing distinct rows of short, curved setae, and 

 three long, sharp spines, near the bases of the processes. 



Hab. San Antonio Bay. 



The side view of this beautiful species can scarcely be 

 distinguished from T. contortum of Shadbolt, from which 

 in this view, it difi'ers chiefly in the straightness and sharp- 

 ness of the spines, which project outwards. In front view, 

 however, they are easily distinguished. The sides are con- 

 cave, instead of straight, the spines are closer to the proc- 

 esses, and are comparatively short, projecting outwards. I 

 regard this as of a different species from T. contortum of 

 Shadbolt, with which it was carefully compared by both 

 my father and myself. Several specimens occur in this 

 locality. It is probable that the two figures 60 and 61 

 were drawn from different specimens, which would account 

 for the difference of size. I have omitted the details of 

 Fig. 60, as I have been unable to find a similar specimen. 



Figs. 62-64. Syringidium Americanum, Bail., nov. sp. 



