336 Messrs. W. K. Parker and T. R. Jones on the 



(A. a-e). Walker, Test. Min. figs.* 1, 2, 3, 4, & 10. These 

 are Miliolce, of the Quinqueloculine type. Some are young- 

 forms, as figs. 2 and 10. Fig. 10 is the double primordial 

 chamber of a carinate Quinqueloculinaf . Fig. 2 represents a 

 young striated shell J in a more advanced stage of growth than 

 that shown by fig. 10. These forms, which are characteristic- 

 ally the young forms of the Quinqueloculine varieties of Miliolu, 

 have been named Adelosina by D'Orbigny. 



Figs. 1 & 3 represent small specimens of Q. Seminulum§ ; 

 fig. 3 is pi'obably a flattish individual ||, broken through the 

 middle %. Although showing only three chambers (and inso- 

 much Triloculine), fig. 4 (Vermiculum subrotundmn, Montagu) is 

 probably an undeveloped form of the common inflated Q. Semi- 

 nulum, var. secerns**. 



(B.) Fig. 5 is a specimen of the common Polymorp/miaff, of 

 small growth. This is well known as P. communis, D'Orb. 

 (with interminable degrees of size and shape; but the name 

 lactea (Kanmacher, for Walker and Jacob) is an older appella- 

 tion. 



(C. a-d.) Fig. 6 is a well-formed Lagena%%, with strong riblets, 

 and presenting one of the countless modifications of the costate 

 ornament. This is the Serpula [Lagena) sulcata of Walker and 

 Jacob (in Kanmacher's edition of Adams's l Essays') ; also the 

 L. striata of Montagu. In quoting Kanmacher, Turton in his 

 ' Linn.' misnamed this Lagena " Serpula Lagena," instead of 

 S. (L.) sulcata. Montagu appears not to have referred to Kan- 

 macher, but to have used Turton's list ; and he supplied the 

 trivial name " striata " from the description in the ' Test. Minut.,' 

 whence also Jacob had previously taken the name sulcata, pub- 

 lished by Kanmacher. 



Prof. Williamson has hence been led to figure and describe as recent two 

 fossil specimens of Frondicularia well known as belonging to the Chalk. 



* The figures on the plates in Walker's work are numbered consecutively 

 throughout. 



t For the plan of growth of Miliolm, see Parker, ' On some Indian Mi- 

 liolitidfe,' Microsc. Transact, new ser. vol. vi. p. 53; and Williamson's 

 Monogr. Recent Foram. p. xviii. 



X "From Sandwich and Reculver; though not common." 



§ Fig. 1 is referred with a doubt to this species by Walker and Jacob, 

 who also observe, " It varies in size and shape, and is found in every por- 

 tion of the sea-sand which hath been examined." It is the Vermiculum 

 intortum of Montagu, who hesitates to place it with M. Seminulum. 



|| " From Sandwich ; very rare." 



5T Montagu also intimates that it must have been a mutilated specimen. 



** "In sand of all the different, parts of the shore." 



ft" " From Sandwich ; not common." 



X+ " From Sandwich, Reculver, and Sheppcy ; very rare." 



