for the Microscope. 93 



in appearance from its mature stage. In the former con- 

 dition it is very common. (PI. IX., fig. 23.) 



726. The GLOBIGERINA (Globigerina bulloides). This 

 very much resembles the Chalk Globigerina, and is by 

 some authors regarded as the same species. It is like a 

 spiral mass of little globes. This species is found almost 

 everywhere, not only around our coasts, but from the 

 bottom of the Atlantic. 



727. The TRUNCATULINA (TruncatuHna lobatuld). 

 This is a parasitic species, with a spiral form, containing 

 numerous segments. It is found attached to the larger 

 sea-weeds and the shells of molluscs, and abounds on all 

 parts of the coast. 



728. VARIABLE TEXTULARIA (Textularia variabilis}. 

 This genus has the segments arranged in two series; and 

 in this species the form is oblong, with the segments a 

 little elongated transversely, diminishing slightly towards 

 the apex. It is somewhat transparent, and of a dirty-white 

 colour. (PI. IX., fig. 19.) 



729. WEDGE-SHAPED TEXTULARIA (Textularia cunei- 

 formis). The outline of this shell is wedge-shaped, with 

 numerous segments divided by depressions. Of a pale 

 dirty-brown colour. Found in numerous localities around 

 the British coast. (PI. IX., fig. 24.) 



730. TWIN-CELLED SHELL (Bifav/taa ringens). The 

 shell is oval, with its last segment projecting beyond the 

 previous one, with a rounded margin. It is white, glossy, 

 and opaque. Found at Exmouth, Scarborough, White- 

 haven, Plymouth, and other places. (PI. IX., fig. 20.) 



731. SEED-LIKE MILIOLINA (Miliolina seminuluni). Of 

 a very peculiar structure, generally with only five segments 

 visible. Oblong, and compressed on one side. In tex- 

 ture it resembles porcelain, being white, opaque, and 

 glossy. (PI. IX., fig. 21.) 



732. PARASITIC SPONGE (Grantia compressd). Small, 

 whitish, pear-shaped, flattened objects attached to sea- 

 weeds; may be sliced lengthwise into two thin segments, 

 mounted dry or in balsam, and thus exhibit sponge structure. 



