1861.] M. O. A. L. MORCh's RKVIEW of the VERMETID/E. 161 



The affixed side wants the thick exterior layer, so that tlie thin 

 interior brown one is exposed, which seems to indicate that the ani- 

 mal has been slightly burrowing, although it is quite flat, without 

 any trace of convexity. The size and form are those of S. textum, 

 M. ; but the sculpture and semicylindrical vaulted shape of the whorls 

 are quite different. 



16. Siphon lUM pictum, Morch. 



T. tenuiuscula, repens, siiperficialiter corrodens ; anfr. subcylin- 

 drici, superne planiusmli, liris nodidiferis conipressis 4—5, utrin- 

 qiie lineaferruginea terminatis, lira externa interrupta ; noduli 

 obsoleti, elongati, remoti (subsquamosi), antice interdum Jissi ; 

 interstitia lirulis diiabus iiKequalibus ; lamince incrementi tenuis- 

 simce, appressce, margine leviter rimosce, in interstitiis arcuatis ; 

 apertura ampla, circularis ; intus ubique badia vel castanea. 

 Diam. apertures 10 m. 



T. juvenilis jjlanorbiformis . Opercidum ignotum. 

 Hab. India orientalis ; in specimen pedale Tridacnce gigantis le- 

 viter corrodens (J\Ius. Regium). 



Humphrey, Conchology, pi. 10. f. 12, 12 (verisimiliter). 

 This shell is rather thin in proportion to its size. The lamince of 

 growth are arcuate between the grooves, and are not unlike those of 

 iS. textiim, var. /3, which it also resembles in the lirce being most 

 strongly coloured at the sides. 



Var. a. turboides. 



T. crassa, Candida, turbinata; anfr. ultirmis superne planmscidus, 

 antiquatuSffulvus, liris A—&ferrugineis, nodulis elongatis, sub- 

 squamosis, compressis, badiis ; interstitia lirulis 1—2 parvis ; 

 latus exteimum incequale, nodidosorugosum, internum planum ; 

 lamince et strice incrementi arcuatcp., unde interstitia leviter im- 

 bricata ; apertura subovalis, intus Candida, inf erne fascia tosta 

 intrante pellucente. 

 Apert. 8 m. lata, 10 alta ; diam. anfr. ult. 12-13 m. (coll. Cuming, 

 sine loco). 



Hab. India orientalis. 



A detached specimen with the impression of the ribs of a Pecten, 

 small remains of a yellow coral, and an agglutinated dark-green 

 spine of Stella spengleriana, Chemnitz, to which it w^as very likely 

 attached. 



This variety differs chiefly from the type in its great thickness and 

 in having only a dark basal band inside, while the whole interior of 

 the type is brown. The sides are pure white without longitudinal 

 grooves. The under side shows, close to the mouth, a part of the in- 

 terior dark band. On the upper side are four or five not very pro- 

 minent arched varices, gaping a little in the front. From the 

 var. y of S. nebulosum it differs in its proportionately larger calibre, 

 but chiefly in its yellow band and browu-coloured grooves, of which 

 I have never seen any trace in the numerous specimens of its West 

 Indian analogue. 



Proc. Zool. Soc— 1861, No. XI. 



