C testa minima, apice superiore subacute) ........... 18 Formicarium. 



( apice superiore mucronato ............. 19 Secale. 



C labio externo infra subangulato ............ 20 Spelta. 



( dorso obtuse angulato .............. 21 intermedium. 



C rostris breviusculis 22 birostre. 



( rostris longioribus 24 



C testae corpore fusiformi ............. 23 longirostratum. 



I testa; corpore ovato ............. 24 Volva. 



2 ^ 



C testa, cylindrical, margine subacuto ........... 25 aciculare. 



testa, ventricosa., margine acuto ........... 26 patulum. 



Species incertae sedis ........... 27 hordcaceum. 



OVULUM OVUM. Fig. 1 to 5. 



O. testd ovato-inflatd, medio ventricosd, politd, lacted; extremitatibus prominulis, subtruncatis ; fauce aurantiaeo-brunned : 

 long. 3 T V, lat. 2 T V poll 



Ovula Oviformis, Lam,. JJnim. sans vert VII., 366. Bulla Ovum nonnull. 

 Var. testa pygmaea, incrassata, dorso utrinque sulco terminali cicatricoso instructo; long, exempt, minor. \ T \, lat. T 8 „ poll. 



exempl. majusc. 2 r \, lat. 1 T \ poll. 



Hab. in Oceano Indico. 



Desc. The largest and handsomest species of the genus. Shell brilliantly polished, milk-white, egg-shaped, both 

 extremities prominent, slightly truncated; outer lip much thickened, irregularly crenulated on its inner edge; inside of a rich 

 orange brown; a fold of the inner lip forms a regular canal at the upper as well as lower extremity. The very young shell is 

 slightly transversely striated, its surface is duller, its outer lip is sharp-edged and not inflected ; as it increases, the outer lip becomes 

 thickened and turned inwards ; and the shell attains its brilliant polish : the colour of the inside also strengthens with age; the very 

 young shell being colourless. A dwarf variety occurs which is less than an inch and an half long, and which has an irregular 

 cicatrix at the back of each produced end. 



OVULUM MARGARITA. Fig. 19 and 20. 



0. testd ovali-subglobosd, svperne obtusd, infrd subacaminatd, albd; columella intus prope basin depresso-concavd; labii externi 

 margine rotundato, intus denticulato ; long. x-j-, lat. T \ poll. 



Licium Margarita, G. Humphrey, MS. ined. 



Hab. in Insulis quas " Friendly" vocamus, in Mari Pacifico. 



Desc. Shell oval, nearly globular ; obtuse at the upper end, and slightly acuminated at the lower; perfectly white ; lower 

 part of the columella depresso-concave within; edge of the outer lip rounded, denticulated within ; canals very short, the upper 

 one turned to the left. 



Received from the Friendly Islands by Mr. G. Humphrey ; all the specimens in his possession, one only excepted, were pierced 

 and strung by the natives. 



OVULUM ADRIATICUM. Fig. 23 and 24. 



0. testd oblongo-ovali, subventricosd, utrinque subacuminatd, pallide earned, hyalind ; labii externi margine angusto, intus 

 denticulato ; columella superne uniplicatd, infrd subdepressd, intus marginatd ; long. -j%, lat. T %, poll. 



Hab. in mari Adriatico ; (communicavit Dr. Goodall,) et in Mari Siculo. 



Desc. Shell oblong-oval, rather ventricose ; somewhat acuminated at both extremities, pale flesh-colour, hyaline ; margin 

 of the outer lip narrow, denticulated on the inside : upper end of the collumella with one oblique plait ; lower end somewhat 

 flattened, with a thickened internal margin. 



I found one specimen of this in G. Humphrey's collection ; another was given to me by the Rev. Dr. Goodall, who brought 

 several from the Adriatic. It has since been found abundantly on the coast of Sicily. 



