I860.] JONES AND PARKER — FOBAMIHTFEBA. 305 



Arctic Seas), has more than one chamber, the shell in its early stage 

 being formed of a few spirally arranged hut variable chambers ; and 

 at a later period being moulded on an undivided, vermiform sarcode, 

 either discoidal or irregularly elevated ; sometimes passing at nearly 

 right angles over the disc, or forming sudden loops and twistings*. 



T. squamata proper has the shell divided throughout into lunate 

 and flattened chambers, several in a whorl, and regularly increasing 

 with the progress of growth. It much resembles those flatter varie- 

 ties of Eotalia Turbo which are intermediate between R. globular is 

 and R. rosacea. T. squamata may easily be confounded with little, 

 conical, scale-like varieties of Valvulina triangularis; but the latter 

 (more nearly allied to the Yemeuilino Te.rtularia}) have never more 

 than three chambers in a whorl, and are more coarsely sandy. 



T. squamata inflata (Motalia infiata, Montagu) has been already 

 described (Ann. Nat. Hist. Joe. cii.). 



92. Valvulina angularis, D'Orb. Clavulina annularis, D'Orb. Ann. 

 Sc. Nat. vii. p. 102, pi. 12. f. 7. The chief distinctive feature 

 of this Clavuline form is the lingual process, or valve, partially 

 occluding the aperture, — a characteristic of Valvulina. 



94. Globigerina Jielicina, D'Orb. Ann. Sc. Nat. vii. p. 277, No. 4 ; 

 Soldani, Testaceog. i. pt. 2. pi. 130. fig. qq, rr,pp,p. 



97-108. These arc varieties of Rotalia (Planorbulina) farcta, F. it M . 



109-118. Varieties of Rotalia repanda, F. & M. 



114. Rotalia elegans, D'Orb. Ann. Sc. Nat. vii. p. 276, No. 54 ; 

 Soldani, Saggio Orit. pi. ii. f. Q, It ; Rotalia Partschiana, D'Orb. 

 For. Foss. Vien. pi. 8. f. 1-3. This is a variety of R. repanda. 



116. Rotalia vermicula ta, D'Orb. Planorbulina vermiculata,WOrb. 

 Ann. Sc. Nat. vii. p. 280, No. 3 ; Soldani, Testaceog. i. pt. 3, 

 pi. 161. fig. A B C D. This flat few-celled Spirilline Rotalia, 

 resembling the Planorbuline forms of R. farcin merely in 

 outline and flatness, passes gradually into the R, repanda by 

 regular gradations, especially through 11. pulchella : and differs 

 in structure and habit very markedly from every variety of 

 Rotalia (Planorbulina) farcin. 



118. Rotalia excavata, D'Orb. Valvulina exoavata, D'Orb. For. 

 Canaries, pi. 1. f.43— 46. The Lobular process of the chamber 



(common in varieties of R. repanda), which has nothing in 

 common with the lingual plate of sandy Valvulina, has caused 

 this form to he mistaken I'm- n Valvulina. The shell is essen- 

 tially ltotalian in its BtrUCture. 

 1 L9 123. These an' varieties of Rotalia Beecarii, I. inn. 



1 20. Rotalia ammonifbrmu, 1»"< n-b. Ann. Bo. Nat. \ ii. p. 276, No. 33 ; 

 Soldani, Testaceog. i. pt. 1. pi. 34. tig. A'. 



* The Serpula muilla of Schlotheim (Sptrillina jnuilla, Jones), from the 

 Permian Limestones of Durham and Germany, is probablj oloaalj relati 

 this form. 



/. -J 



