164 SILIQUARIA. 



cross-bars, which, with the upturned edges of the cutting, 

 form a sort of chain. 



3. PONDEEOSA, f. 5, March. — Quam S. australis latior, 

 magis ponderosa ; anfractibus versus apicem rotundis, lasvius- 

 culis, approximatis. — The tube is thicker, and the coils more 

 rounded and heavy than those of S. australis. 



4. CuMiNGii, f. 6, March. — Tuba angusta elongata alba, 

 lentissime crescens, laxe spirata, spiraliter et concentrice 

 striata; fissura dense articulata. — A rather closely striated 

 white narrow tube, very slowly increasing and rather loosely 

 coiled. 



5. LACTEA, f. 1, 2, Lamarck. — Tuba parva Candida, vel 

 fusco vel purpureo tincto, frequenter aggregata ; leviter 

 striata ; anfractibus apicalibus spiraliter pyramidatis ; fissura 

 minute articulata. — A small species found in conglomerated 

 masses. The little tubes are nearly smooth, and their first 

 coils pyramidally spiral. The slit is closely articulated. 



6. Eeentzii, f. 9, March. — Tuba breviuscula angusta, pyra- 

 midaliter spirata, fusca crassiuscula, concentrice inciso-sulcata ; 

 fissura dense articulata, spiraliter distanter subsulcata. — A 

 narrower tube than 8. senegalensis, of a burnt brown colour 

 and pyramidally spiral towards the apex. 



7. SENEGALENSis, f. 17, Rccluz. — Tuba rubro-fusca solida, 

 lente crescens, extra concentrice rugata, spiraliter leviter 

 sulcata, intra laevigata, fissura versus apicem articulata, versus 

 aperturam simplici. — As compared with the preceding species, 

 the tube is of more equal diameter throughout. 



8. ENCAUSTICA, f. 18, Morch. — Tuba parva crassa, irregu- 

 lariter pyramidata extus incrassata ; fissura versus spiram 

 clausa, deinde articulata, versus aperturam simplici. — The 

 tube is roughened on the outside by an apparent incrustation. 

 The fissure is closed towards the apex, articulated next, and 

 simple towards the aperture. 



9. TOSTUS, f. 10, March. — 8. senegalensi similis sed ad 

 apicem turbinata. — This is drawn from a specimen named as 

 above in the British Museum, and being unable at the moment 

 to refer the description, I can state no difference of specific 

 importance between it and sp. 17, except that the tube is a 

 little smoother. 



