REPOKT ON THE GASTEROPODA. 69 



rather more oblique, but less curved, the base is flatter, the umbilical pad is thicker, the mouth more 

 transverse and squarer in form ; and yet, after all, I greatly doubt that they are really distinct. The 

 embryonic apexes are identical. 



29. Trochus (Photinula) tceniatus (Sowerby). 



Turbo tceniatus, G. B. Sowerby (1825), Tankerville Catalogue, Appendix, p. xiii. No. 1402. 

 Trochus bicolor, Lesson, "Coquille," Plates 1826, Text 1830, p. 345, pi. xvi. fig. 3. 

 Margarita tamiata, Sowerby, Conch. 111., fig. 2. 



„ „ Reeve, Conch. Syst., vol. ii. p. 169, pi. ccxxi. fig. 2. 



Trochus (Margarita) tceniatus, Philippi, Abb. und Besch., vol. i. p. 137, pi. xxxii. (Generis iv.), fig. 2. 



„ tceniatus, Philippi, Conch. Cab. (ed. Kiister), p. 251, sp. 322, pi. xxxvii. fig. 12. 



„ (Margarita) purpuratus, Forbes, Proc. Zool. Soc. Lond., 1850, p. 272, pi. xi. fig. 11. 



„ tceniatus, Wood, Ind. Test. (ed. Hanley), p. 219, pi. v. fig. 12. 

 Margarita tamiata, Reeve, Conch. Icon., vol. xx. pi. i. fig. 4. 

 Trochus tceniatus, Fischer in Kiener's Iconog., p. 319, Mo. 184, pi. c. fig. 2. 



Station 315. January 26-28, 1876. Lat 51° 40' S., long. 57° 50' \V. Port William, 

 Falkland Islands. 5 to 12 fathoms. Sand and gravel. 



Station 316. February 3, 1876. Lat. 51° 32' S., long. 58° 6' W. Port Louis, Falk- 

 land Islands. 2 to 5 fathoms. Mud. 



Habitat— Straits of Magellan (Lesson and British Museum), Falklaud Islands (Phil.), 

 W. coast of N. America (Forbes). 



The operculum of this species does not seem to have been mentioned. It is thin, of many whorls, 

 which are flanged on the outer face along their edge. 



30. Trochus (Photinula) expansus (Sowerby). 



Margarita expansa, Sowerby, Malacol. and Conchol. Mag., p. 24, and Conch. Illustr., figs. 16 and 17. 

 Trochus expansus, Philippi in Conch. Cab. (ed. Kiister), p. 254, sp. 327, pi. xxxvii. fig. IS. 



(Margarita) Hillii, Forbes, Proc. Zool. Soc. Lond., 1850, p. 272, pi. xi. fig. 10. 

 Photina expansa, Adams, Monog. Trochid., Proc. Zool. Soc. Lond., 1851, p. 191, sp. 3. 

 Photinula expansa, Adams, Genera, vol. i. p. 428. 

 Photina expansa, Tapparone-Canefri, Viaggio " Magenta," p. 67. 

 Trochus (Photinula) expansa, E. A. Smith, Moll. Kerguelen, Phil. Trans., 1877, p. 11 (sep. imp.) 



Station 144a. December 26, 1873. Lat. 46° 48' S., long. 37° 49' 30" E. Off Marion 

 Island. 50 to 75 fathoms. Volcanic sand. 



Station 145. December 27, 1873. Lat. 46° 43' S., long. 38° 4' 30" E. Between 

 Marion Island and Prince Edward Island. 50 to 140 fathoms. Volcanic sand. 



Station 149b. January 17, 1874. Lat. 49° 28' S., long. 70° 30' E. Near entrance 

 of Royal Sound, Kerguelen. 25 fathoms. Volcanic mud. 



Station 149c. January 19, 1874. Lat. 49° 32' S., long. 70° E. Balfour Bay, Royal 

 Sound. 60 fathoms. Volcanic mud. 



