48 ZOOLOGY OF THE VOYAGE OF THE SULPHUR. 



Family — Scalariace^. 

 Scalaria. Lamarck. 



195. Scalaria glabrata, Hinds, Proceed. Zool. Soc. 1843, p. 124. Testa elongata, polita; 

 anfractibus decerns, rotundatis, fere disjunctis ; costis membranaceis, vicinis supra, et infra connatis, 

 prope suturam dilatatis; anfractu ultimo decemcostato ; apertura ovali ; umbilico peritremate tecto. 



Inhab. Amboina ; Straits of Macassar ; Straits of Malacca. On the muddy 

 floor, in from ten to seventeen fathoms. 



The specimens were all obtained without the animal, but the mottled appear- 

 ance which they present seems to indicate, that when recent they were most pro- 

 bably of a light brown colour. 



196. Scalaria Diana, Hinds, 1. c. p. 125. Testa, ovata, acuminata, polita ; anfractibus 

 septenis connatis, costis valde alseformibus ornatis ; anfractu ultimo hexacostato, ad basin obtuse 

 carinato ; apertura, rotundata, inferne subtruncata; peritremate extus alato ; umbilico nullo. 



Inhab. Gulf of Nicoya ; from thirty-six fathoms, among mud. 



197. Scalaria vestalis, Hinds, 1. c. p. 125. Testa ovato-elongata, pallida; anfractibus nonis 

 rotundatis, connatis; costis numerosis, tenuibus, sparsim varicosis, lineis transversis eleganter 

 cancellatis ; apertur& ovali ; umbilicata. 



Inhab. New Guinea ; from seven fathoms, among mud. 



An elegant cancellated species, with numerous fine ribs, which, when becom- 

 ing varicose, are slightly spined above. The number of ribs on the last whorl 

 appears little liable to fluctuation, and they become a very useful and valuable 

 character in the discrimination of the species. In S. vestalis their number is 

 twenty-two. 



198. Scalaria suturalis, Hinds, 1. c. p. 125. Testa elongata, pallide fusca ; anfractibus 

 decenis, connatis ; costis numerosis, parvis, approximatis, lineis transversis decussatis, subdistanter 

 varicosis; sutur£i et anfractu ultimo ad basin carinato ; apertura subrotunda ; umbilico nullo. 



Inhab. Straits of Malacca ; from seventeen fathoms, among mud. 



An elongated shell ; also somewhat cancellated by lines traversing the nu- 

 merous small ribs. At intervals of something less than the volution of each 

 whorl a thick rounded varix is formed ; a keeled line also occupies the most 

 inferior portion of the whorl, close to the suture. The specimens had been left 

 by the animal some time previous to being captured, and though they are not in 

 very good condition, there still remains a disposition to a dark brown banding. 



