1883.] 'lightning' AND 'PORCOPINe' ICXPEDITIONS. 99 



body-whorl only, or on the upper whorls, or round the umbilicus ; 

 some (var. coronata) have a row of beads below the suture. In all 

 my specimens there is a minute tubercle on the broad and fretted 

 pillar near its base, but not at its base as stated by Mr. Dall in the 

 description of liis specimens. The young are always umbilicate. 



Philippi's description of his genus Oxystele in the ' Ilandbuch der 

 Conchyliologie und Malacozoologie,' 1853, p. 210, is as follows: — 



" Oxystele, Ph. 1847, Zeitschr. f. Malak. p. 19 \ Das Gehiiuse ist 

 conoidisch, glatt, ungenabelt, anstatt des Nabels eine diinne porzel- 

 lanartige Ausbreitung der Spindel ; diese ist platt, schneidend, geht 

 allmiihlig in die diinne aussere Lippe liber. Tr. merula.'" These 

 characters exactly suit the present species. Mr. Dall proposed a 

 new sectional name Bathymophila. 



The manuscript name which I had given to the present species 

 was nitens ; but that name had been already used for an x\ustralian 

 species. 



I' 11. Trochus suturalis, Philippi. 



T. suturalis, Phil. En. Moll. Sic. i. p. 185, t. x. f. 23, 23a; ii. 

 p. 156. 



' Porcupine' Exp. 1869 : St. 36. 1870 : Atl. 3, 3a, 6, 8, 9, Vigo 

 B., 13, 24-28a, 36 ; Med. 4.5, Rasel Amoush, G. Tunis. 



Distribution. Bay of Biscay and G. Marseilles ('Travailleur' Exp.); 

 174-1025 fms. 



Fossil. Pliocene : Monte Mario, Calabria, and Sicily. 



Animal pale brownish-yellow : tentacles conical, edged on each 

 side with a purplish-brown line : eyes black, conspicuous, placed 

 as usual in the genus : foot thick, fringed with white conical papillae, 

 4 on each side ; uo ocelli or eye-spots. 



The small fossil originally described and figured by Philippi did 

 scant justice to this beautiful shell, which has now been discovered 

 to be still living. My finest specimens are about seven tenths of an 

 inch in length and breadth ; the colour is cream with the tint of a 

 blush rose ; and the sculpture is variable as regards the beaded 

 rows of strise. Young specimens have a deep umbilicus which is 

 enclosed within a sharp ridge. The callus which covers the umbili- 

 cus in the adult is proportionally thinner than in the last species. 



T.folini of Fischer is a variety of this species. 



C. Trochocochlea, Klein. 

 u 12. Trochus lineatus, Da Costa. 



Turbo lineatus. Da Costa, Brit. Conch, p. 100, t. vi. f. 7. 



Trochus lineatus, B. C. iii. p. 317 ; v. p. 203, pi. Ixii. f. 9. 



' Porcupine ' Exp. 1869 : St. Donegal B. 1870 : Atl. Vigo B. 



Distribution. N. Ireland and Anglesea to Mogador, the iEgean, 

 Adriatic, Canaries {d' Oi-bigny)1 ; 0-20 fms. My friend Mr. 

 Watson kindly sent me from Madeira specimens of an allied species, 

 ^ "dSiis echarf, crrijXij Saule." 



