44 



parvis, antica bilobata; labio interno angusto, vix sulcato, 

 antice gibboso, rosea, tincto. 



A most beautiful shell, rarely seen in perfection. It 

 is white, beautifully and regularly marked with brown ; the 

 outer lip is much dilated, strongly grooved, and banded on the 

 margin between the digitations with pinkish buff ; the inside 

 is marked by a tinge of rich purple. There are ten small 

 fiattish digitations besides the caudal canal. 



10. P. Elongatum. (pi. xi. f. 4.) Swains. Sow. Tank. 

 Cat. P. Croceum, Reeve. Conch. Syst. pi. 248. f. 2. 



[G. B. S. Jun. regrets the necessity of changing his opinion, 

 with respect to the relative merits of the two names given 

 above. The author of the Tankerville Catalogue has expressed 

 his assurance that the name elongatum was published by 

 Swainson previously to being quoted in that work. The 

 name is also in common use.] 



T. sub-elongata, spiraliter sulcata, tuberculis magnis ad 

 angulum, costis noduliferis, infra-angulum ; spira elongata, 

 acuminata ; apertura sub-angustata ; labio externo crasso, 

 margine lato, complanato, intus sulcis albis purpureo 

 interlineatis, striato ; labio interno crasso, sulcato, margine 

 distincto, digitis extra canalem anticam octo, quarum una, 

 pcstica, elongata, bilobata, turn una sub-recta, sub-elongata, 

 deinde sex brevibus obtusis. 



This species is remarkable for the elongated spire, and the 

 flattened margin of the outer lip, with the short obtuse 

 digitations. The colour is the same as in other species, with 

 purplish black lines between the white grooves of the aperture, 

 and a strong tinge of yellow inside. 



EXPLANATION OF PLATE XI. 

 1. Pteroceras Scorpio Sp. 6. 



2. Pseudoscorpio. 7- 



3. Millepeda. 8. 



4. elongatum. 10. 



5. Lambis. 2. 



6. , var. 



7- , var. 



8. Multipes. 9. 



9. rugosum, var. 5. 



10. 



11. Aurantia. 3. 



12. Chiragra. 4. 



13. truncatum. Sp. 1. 



