17 



Coscinodisciis. Cells sexagonal; regularly arranged; largest in centre; FIG. 3. 

 margin ornamented with double row of verticaLcfills. 2000 fathoms 



Note. Some of these forms may be Eupodiscii, although the elevated 

 processes were not visible. 



These discoidal forms Coscinodiscus, Eupodiscus, Asterolampra, 

 Asteromphalus, Aulacodiscus, &c., and many others so much resemble 

 one another when subject only to a medium power, that an error in 

 classification will be excusable here. 



Eupodiscus. Cells circular; eleven transparent oval cells near PLATE 2. 

 margin ; single row of vertical cells, with spinous margin, like a pro- 

 jecting fringe of silex. 



There were also found a great number of smaller forms like B in 2000 fathoms 

 this sounding probably Thalassicolla. 



Coscinodiscus. Cells circular ; margin smooth ; colour pale blue in FIG. 2. 

 centre, margin brown ; upper valve convex at centre. 



Lagena Vulgaris. Of ovate form; neck long and contracted; orifice PLATE 3. 

 perforated ; tube two-thirds ; transparent and hyaline texture ; FIG. l. 

 foraminse not visible. This is a variety of the form of Lagena Vul- 

 garis. 



Asterolampra (Moorheadii). Centre oval, surrounded by one row FIG. 2. 

 of cells ; equally formed except the median ray, which swells on each 

 side of the oval ; the marginal semicircular discs are covered with 

 minute areolae gradually decreasing in size to the margin."* 



t This pattern was also transferred to ivory, and appeai-ed (if possible) more beautiful 

 than the Asterolampra Bishopii. It was a nice way of perpetuating these rare and 

 pretty forms. Diameter, 2-^ inches. This I named after my friend Dr. Moorhead, of 

 Weymouth. 



C 



