S C A L X R 1 A. 



Plate I. 



Genus SCALARIA, Lamarck. 



Tesla turrita, frequenter alba, Iwvigata. anfradiha)< 

 rotundis, frequenter separatis ; costis variconis plus 

 minusve regularibus ornatis ; apertura inteyra, 

 manjine rejlexo, rotundo. Operculum corneum, 

 paucispirale. 



.Shell turritcd, froqueiitly wliito, smooth, whorls 

 rounded, frequently separated ; oniaiuented with 

 more or less varicose ribs ; aperture entire, 

 margin reflected, rounded. Operculum horny, 

 with few whorls. 



The system of regular varices, often continued from 

 whorl to whorl in a half-spiral direction up to the apex, 

 the separation of the whorls in some instances, the 

 delicate colouring in others, and the e.xcpiisite sculpture 

 of many species, combine to render tliis one of the most 

 attractive of genera. The geographical distribution of 

 the genus is world-wide, and many individual species 

 have a very wide range indeed. China and tlie 

 Philippine Islands produce a large number, and a few 

 are found in Great Britain and more northern localities. 



jpecies . 



(Mus. Nobis.) 



SCALARiA NEGLECTA. Scu. testd late pynimiclatd, per- 

 forata, inter varices pallide falvi'i ; anfractibus 

 rapide crescentibus, disjunctis ; varicibns sub- 

 numerosis, tenuiusculis, continuis, prope suturam 

 aculeatis. 



The neglected Scalatja. Shell broadly pyramidal, 

 perforated, pale fulvous between the varices ; 

 whorls rapidly increasing, disunited ; varices 

 rather nmnerous, rather thin, continuous, aculeated 

 near the suture. 



Adams & Reeve. Voy. Samarang, Zool., p. .Tl, pi. 11, 

 f 15. 



Scalaria Pallasii, var. Sowerby Thes. Cunch. 



Ilab. China. 



Scalaria Pallasii is a narrow shell with proportionally 

 larger and more distant ribs. The difference between 

 the two sjiecies is well maintained in all the 

 specimens. 



ipecies 



(Mus. 



LAIilA (IIIADATA. Sc(l. lesti'l el,>ll;/<ll<)-j 

 clerata, acumiiiatd, alb,) ; anfnictihiis n,„ 



■III, hit,. 

 ,'nlibii. 



•lS,_'ulil 



prvp 

 The sTEi- 



qn< 



,li,n-iil. 



;IA. Shell elongate, pyramidal, elevated, 

 acuminated, white ; whorls contingent, slowly in- 

 creasing ; ribs scarcely contiguous, rather thin, 

 stjuare near the suture, slightly aculeated. 



Hinds. Fid. Sowb. Thes., PI. XXXIV. fig. lO'J. 



Scalaria nodosa, Carpenter. 



Ilab Amboyna. 



This very characteristic shell appears in the British 

 Museum under the name nodosa. Carp, 



Species 3. (Mus. Noliis.) 



ScALAi:iA AusTi'.ALIs. Scu. tcsta elimijalil, crassA, 

 ohtusiusculd, inter varices grisescenti ; anfractibus 

 lentc crescentibus, contiguis, subcompresais, infra 

 caiiiiii obtusd, crassd cinctis ; varicibns crassis, 

 subdistantibus, rectiUsculis, continuis. 



The Australian Scalaria. Shell elongated, thick, 

 rather obtuse, greyish between the varices ; whorls 

 slowly increasing, contiguous somewhat com- 

 pressed, encircled below with an obtuse thick 

 keel; varices thick, rather distant, rather strai-ht, 

 continuous. 



Lamarck. Anim. s. vert. Sowb. Thes. Cunch., f r>2. 



Hah. Swan River, Australia. Cape uf Gn.jd Hope. 



