REPOKT ON THE GASTEROPODA. 71 



33. Trochus (Omphalitis) hotessierianus, D'Orb. 



Trochus hotessierianus, D'Orbigny, Moll, de Cuba, vol. ii. p. 59, pi. xviii. figs. 15 to 17. 



„ liotesserianus, Philippi, Conch. Cab. (ed. Kuster), p. 270, sp. 349, pi. xxxix. fig. 15. 

 Omphalitis liotesserianus, Adams, Genera, vol. L p. 429. 



Station 122. September 10, 1873. Lat. 9° 5'S., long. 34 c 50' W. Off Pernambuco. 

 350 fathoms. Red mud. 



Habitat. — West Indies. 



This species, and a good many more of those classed by Adams under Omphalitis, Phil., could 

 not be admitted there with Adams' addition to Philippi's diagnosis of the sub-genus, for they have 

 no " transverse series of granules " whatever. 



34. Trochus (Monilea) benzi, Krauss. 



Trochus benzi, Krauss, Siidafrik. Moll, 1849, p. 99, sp. 15, pi. v. fig. 32. 



„ ,, Philippi, Conch. Cab. (ed. Kuster), p. 320, sp. 418, pi. xlvi. fig. 1. 



„ „ v. Martens, Siidafrik. Moll., Jahrb. malak. Gesellsch., 1874, p. 129, No. 99. 



December 1873. Simons Bay, Cape of Good Hope. 15 to 20 fathoms. 

 Habitat. — False Bay, Simons Bay (Krauss). 



I leave this species among the Monileas, where the Messrs Adams have put it ; but the shell is 

 conoidal, not " orbicular ; " the " axis is," though pervious, not " widely perforated ; " nor is " the 

 umbilicus surrounded by a striated callus ; " nor is " the last whorl rounded at the periphery ;" nor 

 does " the columella end anteriorly in one or two tubercles." The umbilicus, which is almost covered 

 by the reverted lip, is surrounded by a blunt angulation, there is a slight keel at the periphery, and 

 the pillar thins out and passes over into the basal lip gradually. 



35. Trochus (Monilea) belcheri, Phil. 



Trochus belcheri, Philippi, Zeitschr. f. Malak., 1849, p. 148. 



,, „ Philippi in Conch. Cab. (ed. Kuster), p. 302, sp. 394, pi. xliv. fig. 3. 



Station 172. July 22, 1874. Lat 20° 58' S., long. 175° 9' W. Inside the reef 

 at Tongatami. off Nukalofa. 18 fathoms. Coral mud. 



Habitat. — " Unknown." 



This species, as Philippi says, is very like Trochus corrugatus, Koch, indeed very much more so 

 than the figures indicate, but is unquestionably different. It seems to be rare, being apparently 

 absent from the Paris collection, and I failed to find it at the British Museum. One of the speci- 

 mens from Delessert's collection in the Geneva Museum is Koch's, not Philippi's species. The oblique 

 cross hatchings and the spiral threads present some variation. 



