78 MICROSCOPICAL OBJECTS FOUND 



Figs. 69 and 70 are two species of Dentalina 

 (D'Orbigny). In the former, the cells are 

 longitudinally striated, and in the latter smooth 

 I have seen some examples like fig. 69? but 

 in which the axis was straight, instead of being 

 curved, and which, consequently, would belong 

 to D'Orbigny's sub-genus Nodosaria. Fig. 72 

 exhibits a small sectional view of fig. 70. 



Fig. 71 belongs to the recent genus Lagena, 

 or to Oolina of D'Orbigny. 



Of the nature of the two bodies figs. 73 and 

 74, I have not been able to form an opinion. 

 They are small flask-like objects, curiously echi- 

 nulate, the projecting spines being sharp and 

 transparent. They very much resemble some 

 recent Lagense, only the latter are, I believe, 

 always equilateral. Mr. Harris suggests that 

 they may be fragments of Dentalina aculeata, 

 D'Orbigny. 



Fig. 75 represents a lateral, and fig. 76 a dorsal 

 view of a very beautiful Entomostracous animal, 

 which may be conventionally arranged under 

 the genus Cytherina. It is remarkable for the 

 singular series of marginal tubercles, or projec- 



