94 CATALOGUE OF THE RECENT FORAMINIEEEA OF 



5. QUINQUELOCULINA, D'Orb. 



1. Q. Sehinelem, Linn. Miliolina SerainuLuin. Rec. For. Gt. 



Br. PI. VII, figs. 183-185. 

 Common everywhere. 



This may be looked upon as the "type" or central form to 

 which the whole of the Biloculina, Spiroloculince, Trihculince, 

 and. Quinqueloculince, specifically belong. To those whose studies 

 have been confined to more highly organized animals, it may 

 seem strange to regard forms which in their full development 

 appear severally to possess marked distinctive characters, as 

 varieties of a single species ; but the examination of large numbers 

 of specimens leaves no doubt that this is a correct conclusion. 

 Some general observations on this subject are given in the intro- 

 ductory remarks. 



2. Q,. bicobnis, W. Sf J. Miliolina bicornis, Eec. For. Gt. Br. 



PI. VII, figs. 190-194. 

 Common. 



3. Q. secans, 3' Orb. Miliolina Seminulum, var. disciformis. 



Rec. For. Gt. Br. PI. VII, figs. 188, 189. 

 Common, 



4. Q. Feeessacii, D'Orb. Miliolina bicornis, var. angulata. 



Rec. For. Gt. Br. PI. VII, fig. 196. 



One or two small specimens of a sub-angular, ribbed Quinque- 

 loculina, found in sand dredged off Coquet Island, may, with some 

 reservation, be assigned to this form. 



5. Q,. sebkotwda, Montagu. [PL XII, fig. 2.] 



Montagu, in his " Testacea Britannica" (p. 521), describes a 

 sub-orbicular Miliola figured in "Walker's "Testacea minuta" 

 (fig. 4), under the name of Vermiculum subrotunclum. Any doubt 

 which the somewhat vague description might leave as to the 

 species intended is dispelled by reference to Walker's drawing, 

 which represents a possibly not fully grown specimen of an out- 

 spread, round-edged Quinqueloculina, without surface-ornamenta- 

 tion. Diameter -„Vth of an inch. 



