Dr. G. C. Wallicli on a new Sessile Foraminifer. 501 



suporne paululum infra suturam sulco angusto leviter constrict!, 

 iufra sulcum costis subrotundatis (iu anfr. ultimo tlexuosis iiiferne 

 desineutibus circiter 14) instructi, striis spiralibus remotis paucis 

 (in anfr. ult. ad 12) insculpti ; anfr. ultimus subventricosiis, 

 testae -g- aequans ; apertura intiis fuscescens, basi oblique lateque 

 canaliculata, longitudinis totius | aequans ; labrum tenue, suporne 

 ad sulcum leviter siuuatum ; columella medio arcuata, basi obliqua. 

 Long. 26 mill., diam. 10. 



Hah. South Africa. 



This shell, although without a locality attached, in all 

 probability inhabits the Cape of Good Hope, having with 

 some species from there such a general resemblance as to 

 warrant the supposition ; the brown band occupies about half 

 the whorls, not quite reaching the upper ends of the ribs. 



Pleurotoma [Glionella) platy stoma. 



Testa elongata, turrita, flavescens (interdum pallide roseo-fusca), 

 suporne juxta suturam et mediaue inter nodulos dilute fusco 

 notata ; anfract. 7, primi 2 convexi, papillares, Iteves, caeteri 

 superne ad suturam margine incrassato leviter nodoso, deiude 

 concavi, medio angulati, infra angulum plani, circa medium nodu- 

 lorum parvorum obliquorum (ad 13) serie unica ornati, spiraliter 

 striati, striis subdistantibus 10-12, in anfr. ultimo circiter 24, 

 incrementi lineis obliquis striati ; apertura lata, sub(]uadrata, 

 longitudinis testae totius fere -^-^ aequans ; sinus latus, mediocriter 

 profundus ; columella callo tenui induta ; canalis apertus, brevis- 

 simus. 



Long. 13 mill., diam. 5. 



Hah. Cape of Good Hope. 



The two apical whorls are remarkably large. The faint 

 nodules at the top of the whorls and the more distinct ones 

 around the middle have faint dots of bi-own between them ; 

 and the spiral strife are interrupted by them. 



L. — On Rupertia stabilis, a new Sessile Foraminifer from 

 the North Atlantic. By G. C. Wallich, M.D., Surgeon- 

 Major Retired List, H.M. Indian Army. 



[Plate XX.] 



It will, I think, be conceded that a special degree of interest 

 attaches to the Foraminifer about to be described, when I 

 state that it not only represents a well-marked new genus, but 

 is one of the very few forms as yet discovered whose pecu- 

 liarities of structure point to their being sessile inhabitants of 

 the bed of the ocean. 



Ann. & Mag. N. Hist. Ser. 4. Vol. xix. 34 



