“ans 
A. Mollert Grun. 
A. Rogersit (Bail.) A. S., common at 90 ft. 
The deposit presents all the forms figured by Schmidt, with a 
number of intermediate variations. 
Biddulphia Tuomeyi (Bail.) Roper. Several variations of this 
form approach 2. e/egantula Grev., and others are much smaller 
than the type. 
Coscinodiscus apiculatus Ehr. 
C. marginatus Ehr. 
C. emphalanthus Ehr. 
C. perforatus Ehr. 
C. radiatus Ehr. 
C. vobustus Grev. 
The forms of Coscinodisct noticed furnish an interesting study 
of variations, especially in those which approach apzculatus and 
marginatus. 
Craspedodiscus coscinodiscus Ehr., 120 ft. 
Lupodiscus radiatus Bail. A form with five ocelli occurs rarely 
at the depth of go ft. 
Goniothecum odontella Ehr., 90 ft. 
Grammatophora maxima Grun. var.? rare. 
Fyalodiscus laevis Ehr. 
FT. subtéis Bail. The markings in the greater number of 
specimens examined are much coarser than in the type form. In 
some valves which present a greenish color when dry, numerous 
spines are seen at regular intervals, and the zone between umbil- 
icus and margin resembles that of 7. maximus, P. Petit (Diato- 
mee’s de l’le Campbell, f/. z. fig. 7). Other forms without spines 
correspond closely to the var. Japonica of Castracane (Rep. on 
Diat. coll. by H. M. S. Challenger, p/. 78. fig. 4). 
Melosira sulcata (Ehr.) K., abundant. 
Navicula Lyra Ehr., very rare, 90 ft. 
NV. praetexta Ehr., very rare, 90 ft. 
Pleurosigma affine, var. fossilis Grun. 
Podoswa Montagnei Kiitz.? , very rare, 90 ft. This form is 
doubtful as the rim is wider and the general appearance more. 
robust than in any. of the figures published. 
Khaphoneis gemmifera Ehr. 
