On new Deejy-sea Molhisca. 367 



Plate XVIII. 



Fiy. 1. Antennule, male. X 12G. 



Fiij. 2. Mandible and palp, female. X 127. 



Fiff. 3. Mandible and palp, mile. X 258. 



Fie/. 4. Maxilla, male, x 253. 



Fi(/. 5. Anterior foot-jaw, male. X 253. 



Fiff. 6. Fifth pair of feet, male. X 127. 



Fig. 7. Fifth pair of feet, immature male. X 190. 



F'iff. 8. Abdomen, male. X 84. 



Fi(/. 9. Abdomen, female. X 84. 



LV. — Natural History Notes froin U.M. Indian Marine 

 Survey Steamer ''Investigator^ Commander C. F. Oldham., 

 R.N. — Series II., No. 22. Descriptions of new Deep-sea 

 Mollusca. By Edgar A. Smith. 



Of the twelve new species about to be described I regret to saj 

 that, with one exception, all are based upon single examples 

 which have to be returned to the Indian Museum at Calcutta. 

 Dr. Alcock, the Superintendent of that institution, kindly 

 promises, however, to send to the British Museum any dupli- 

 cates which may eventually be obtained. The species are to 

 be figured in the " Illustrations of the Zoology of the ' Inves- 

 tigator '." 



Some of them are extremely interesting on account of their 

 remarkable form and surface ornamentation, whilst others are 

 peculiar on account of their close similarity to species which 

 occur in the North Atlantic. In one instance, Puncturella 

 asturiana, I can find no distinguishing features between the 

 Atlantic and Indian Ocean specimens. 



Pleurotoma Kienerij Doumet. 



Pletirotoma Kieneri, Doumet, Mag. de Zool. 1849, pi. x. 



Pkiirotoma carinata, Reeve (nou Uray), Con. Icon. fig. 56 ; Tryon, 



Man. Conch, vol. vi. p. 173, pi. iv. tig. 49 ; Weinkauff, Jahrbuch. 



deutsch. mal. Gesell. vol. ii. p. ^Sfi, pi. ix. fig. 2; Conch.-Cab. p. 15, 



pi. iii. fig. 1. 



Hah. ? {Bve.., Tryon, Weinkauf) ; China [Brit. Mus.) ; 

 off Ceylon, lat. N. 6° 50' 20", long. E. 79° 36' 20", in 180- 

 217 fathoms {^Investigator^). 



Only a single specimen was obtained. Tiie colour is 

 normal, except that the keel below the suture is rather redder 

 than usual and the spotting or dotting upon the ridges 

 encircling the body»vvhorl is rather fine and inconspicuous. 



26* 



