10 



HARDWICKE'S SCIENCE-GOSSIP. 



[Jan. 1, 1S70. 



hands ; all we design is to supply figures, since these 

 appear to be the first want, and the only want that 

 we have been called upon to satisfy. Hereafter 

 some of the fossil forms may come in for a share of 

 illustration ; but all we intend to promise, for the 

 present, concerns living species. 



run along from end to end of the shell, and its 

 length is about ^ inch (fig. 19). 



Fig. 17- Biloculina sphcera. 



Biloculina spluera (D'Orb.) is one of the rarer 

 forms of the British coast. Mr. Brady says of it, 

 that "in its fully-developed condition it is suffi- 

 ciently distinguished from its allies by its spherical 

 shape, and the large rounded outer chamber, which 

 almost entirely embraces the inner ones" (fig. 17). 



Fig:. 18. Biloculina rlngens. 



Biloculina ringens (D'Orb.) is more common, and 

 is found in the South, whereas the Shetlands is the 

 only recorded locality for the last-named. In fact 

 this species is found almost all around our coast, 

 and is also recorded from the coast of Norway. 

 Two or more of its varieties, which have ranked as 

 distinct species, are almost equally common 

 (fig. 18). 



Fig. 19. Triloculina tricarinata. 



Triloculina tricarinata (D'Orb.) is a common 

 form, in many seas, and is also found in a fossil 

 state in tertiary deposits. Three keels or ridges 



Fig. 20. Trilneuliwi trignnulu. 



Triloculina trigonula (Lam.) is the Miliolina of 

 Williamson's monograph, and is found not only on 

 the coast of the Shetlands, but also at Scarborough 

 and several recorded stations on the South coast- 

 It is about the same size as the last, and, like it, 

 it is opaque, and of a porcelain-like appearance 

 (fig. 20). 



Fig. 21. Plrmorbulina Mediterrancnsis. 



Planorbulina Mediterranensis (D'Orb.) may be 

 regarded as the most common of its genus on our 

 coast, and is the Planorbulina vulgaris of William- 

 son. It is very widely diffused, not only in the 

 Mediterranean and around our own coasts, but also 

 occurring in the Gulf of Mexico, Cuba, Teneriffe, the 

 Antilles, and probably elsewhere (fig. 21). 



Fig. 22. Plunorbulina Ungeric.na. 



Planorbulina Ungeriana (D'Orb.), from the Shet- 

 land seas, is a rarer species, and very delicate. " It 

 has a deep central umbilicus, and the chambers arc 



