62 Mr. J. Y. Johnson on new 



The radiating series of connate or partially free uniserial 

 tubular cells are of ditferent lengths ; some begin at the centre 

 and extend to the top of the vertical marginal wall, others 

 are irregularly shorter. The innermost cells are very short, 

 with oblique elliptical mouths, and some of them are free. 

 The higher cells towards the margin have circular horizontal 

 simple mouths. The walls of the cells and the spaces between 

 them are transversely rugose. The margin of the zoariura 

 rises steeply from the basal plate, and this boundary wall is 

 entirely composed of the mouths of immersed cells to the 

 number of four in a vertical series. Ooecia not observed. 



This species is common on shells from deep water. The 

 longer axis of the largest specimen I have seen measures 

 7 millini., excluding the basal plate, but the majority of my 

 specimens are much smaller. In colour the younger ones are 

 white, the older brownish. 



Diasiojyora pulcliellaj J. Y. Johnson. 



Cells distinct, erect, highest at the centre, gradually shorter 

 towards the margin, ^Yllich is low and thin ; disposed quin- 

 cuncially ; mouths round, horizontal, simple. No adven- 

 titious tubules. Ooecia large, embracing several cells, in- 

 flated, semiglobular, tinely granular, and punctate. Zoarium 

 white hyaline. 



The largest of my few specimens has a diameter of 

 3*5 millim. Three of them in beautiful condition are inside 

 the valve of a Lima ; others are on seaweed. 



Lichenoporidae. 

 (Discoporellidce, Bk.) 



Lichenopora spinata, J. Y. Johnson. 



Zoarium circular, on a thin calcareous base, elevated, 

 almost cylindrical, slightly concave at the centre. Cells 

 distinct, uniserial, higher at the inner end, in radiating some- 

 what irregular series, long and short, four to six in a series. 

 Mouths with four or five spines. In the vertical exterior 

 wall are seen the mouths of about six immersed cells piled 

 one above another. Central area studded with numerous 

 spines and pierced by circular or suboval pores, the latter 

 round at one end, angular at the other, the larger pores often 

 partially filled up within. Surface of central area finely- 

 granular and punctate. One or two spines project hori- 

 zontally from the lower part of some of the inner cells. 



