140 Mr. A. Adams on some Molluscous Animals 



tenuato, acutiusculo, ad dextram leviter verso ; apertura subro- 



tundato-ovata, intus albida niteute. 

 Long. 6, lat. 4, alt. 2^ mill. 

 Habitat in regione Matelle Ceylanica. 



Two specimens were procured by Mr. F. Layard from the 

 Lagalle division of the Matelle district. This is the first species 

 of the genus which has been found in Ceylon. It is related to 

 the European A. fluviatilis, but may at once be distinguished 

 by the elevated radiate ribs which occur at short intervals and, 

 equally with the depressed spaces, are marked longitudinally 

 with the minute ribs at their sides. 



M. Bourguignat represents Ancylus Baconii as occurring in 

 Bengal. A. Verruca, Bens. (Annals for January 1855), taken 

 by me at Bhimtal, and by Dr. Bacon and myself in Rohilkhund, 

 and which was found by Mr. Theobald in Orissa, is the sole 

 Indian species decidedly known. I strongly suspect that M. 

 Bourguignat^s species is that which was taken by Dr. J. F. Bacon 

 at Henley Park, six miles from the Darling Range, in West 

 Australia. 



Cheltenham, Dec. 26, 1863. 



Erratum. — In ' Ann. & Mag. Nat. Hist.' for December 1863, p. 42/, 

 line 11 from top, for "parietal" read " columellar." 



XVIII. — Notes on some Molluscous Animals from ike Seas of 

 China and Japan. By Arthur Adams, F.L.S. &c. 

 " There is in shell-fish something more to consider than their 

 shells," observes wise old Adanson ; and indeed we are all aware 

 that a knowledge of its testaceous envelope is not always suffi- 

 cient to determine the natural position or affinities of a mollusk. 

 I lately placed my genus Scaliula with the " Wentletraps," and 

 associated my Diala with Planaxis', Fenella also fared no 

 better, and was regarded by me as a Pyramidellid. On becoming 

 acquainted, however, with the animals of those genera, I have 

 been enabled, by means of the ^ Annals,^ to refer them to their 

 natural families ; and as any account of these molluscous crea- 

 tures, written down from careful observation on the spot, must 

 be of interest, I have thrown together some of my notes for in- 

 sertion in your Journal. The photographic art may some day 

 be applied to portray the forms of the Mollusca : in the mean- 

 time, accurate drawings should not be despised; and I trust at 

 some future period to be able to reproduce a few of mine of the 

 mollusks of Japan. 



Photinula qucesita, A. Ad. 

 P. testa orbiculato-conica, imperforata, spira elatiuscula, regione 



