1891.] THE 'challenger' expedition. 437 



lineis crispatis), supremi oblique plicati (plicis in ullimo 

 fere ohsoletis) ; apertura elongato-ovata, alba, longitudinis 

 totius 5 paulo superans ; labrum incrassatum, intus liris 

 circiler 10 munitum ; columella leviter arcuata, callo valido, 

 superne tuberculo parvo instructo, indufa ; canalis brevis, 

 obliquus, recurvus^fere clansus. 

 Longit. 41 millim., diam. 22; apertura 14 longa, 9 lata. 

 Hab. In shallow water near Sea Point, Cape of Good Hope ; 

 Natal {Krauss). 



This is a strong, solid shell, entirely white within and without, 

 and ornamented with numerous spiral ridges, which are somewhat 

 regularly alternately larger and smaller, the intervening grooves 

 being merely incised striae. The outer lip is well thickened and 

 armed within with about ten lirse, which, however, do not extend 

 very far within the aperture. 



It does not compare with any other species. In form it somewhat 

 resembles Eiitkria lineata from New Zealand, but is altogether 

 different in scnlpture and the mouth characters. M. magellani, 

 Vclain, has a somewhat similarly thickened labrum, but is altogether 

 different in other respects. 



3. Turritella incolor. (Plate XXXIV. fig. 3.) 



Testa elongata, turrita, acuminata, alba ; anfract. convexiusculi, 

 carinis duobus mediocriter acutis circa medium instructi, 

 liris paucis supra, inter, et infra carinas cincti, ultimus 

 inferne liris concentricis paucis ornatus ; apertura subrotun- 

 data ; columella parum curvata, vix reflexa. 

 Longit. 14 milliin., diam. .5 ; apertura 3^ longa, 2| lata. 

 Hab. Royal Sound, Kerguelen Island, 28 fathoms. 

 The two keels stand out conspicuous, and there is a finer liiation 

 above them, one between the two keels and one below them. The 

 single specimen consists of about ten whorls. It is less slenderly 

 tapering than T. hookeri, lleeve, which, besides the two prominent 

 spiral keels, exhibits only the faintest trace of spiral striae. 



4. Capulus compressus. (Plate XXXIV. figs. 4, 4 a.) 



Testa dextrorsa, alta, pileiformis, lateraliter compressa, planata, 

 tenuis, alba, epidermide decidua flavescente induta, lineis 

 incrementi subfortiter striata ; anfractus 2-3, celeriter cres- 

 ■ centes, duo supremi parvi, vitrei, regulares, convexiusculi, 

 nitentes, ultimus maximus subunguiformis, supra et infra 

 planatus ; apertura dblonga, angusta. 

 Diam. maj. %\ millim., alt. 2\ ; apertura 5 longa, 2 lata. 

 Hab. Station 311. Off west coast of South Patagonia in 245 

 fathoms. 



No described species appears to approach that now before us. 

 Judging from its compressed character it is probably either parasitic 

 upon something with thin filaments or stems (the cirri or rays of a 

 crinoid for example), or it would be found attached to the stems of 

 seaweed. 



