232 JOURNAL, BOMBAY NATURAL HISTORY SOCIETY, Vol. XVI. 



vitreus, tumescens, laavis, ceteris depressis, pulcherrimc sculpturatis, juxta 

 suturas spiraliter carinatis, dein tribus liris minoribus, cum carina fortissima 

 spirali exterius succincta, inter quam et peripheriam lira minore interposita, 

 peripheria quam maxime acuta, pulcbre et minute echinulata, ultimo subtus 

 ad basim imprimis sulco forti, dein duabus vel tribus carinis spiralibus con- 

 spicuis praxlito, carina supra umbilicum, sicut peripheriali, pulchrc sculp- 

 turata et echinulata, umbilico ipso simili modo echinulis, minoribus decorato ; 

 apertura rotunda, peristomate tenui, carina peripheriali ad medium conspicua. 

 Alt. P20, diam. 3 mm. 

 Ilab. Gulf of Oman, lat. 24° 58' N., long. 56° 54' E., 156 fathoms. 

 Among very numerous examples of S. homalaxis. Melv., which appears fre- 

 quent from Bombay northwards, three specimens occurred of a far more select 

 form, which is now described. Its sculpture is most elaborate, the very acutely 

 keeled periphery, bordered (as is the inner basal keel) surrounding the umbilicus 

 with short mucronate crenulations, is most distinctive. The two species of 

 Homalaxis found in the same dredging, and described earlier in this paper, are 

 of a similar texture and bizarre sculpture, especially as regards the aforesaid 

 carinal ornamentation. 



With regard to the Mollusca treated of in this paper, it will be well to 

 state that four types are in the collection of Mr. E. 11. Sykes, viz., Rissoina 

 regktomoides, Eulima 10-gyra, Fluxina Dalliana, and Clathurella SyJcesii. All 

 the rest, with co-types of the last two just mentioned, will be placed in the 

 British Museum (Natural History). 



EXPLANATION OF THE PLATES. 

 Plate A. 



Fig. 1. Emarginula undulata. 



Fig. 2. Camilla. 



Fig. 3. Cyclostrema Jienjamense. 



Fig. 4. supremum. 



Fig. 5. anneUarium, 



Fig. 6. promiuulum. 



Fig. 7. ■ ■ euchilopteron. 



Fig. 8. Liotia romalea. 



Fig. 9. echinacaulha. 



Fig. 10. Enida persica. 



Fig. 11. Euchelus Tonmsendiauus. 



Fig. 12. Solariella zacalles. 



Fig. 13. Calliostoma tlirincoma. 



Fig. 14. Leptothyra rubens. 



Fig. 15. Trichotropis pulcherrima. 



Fig. 16. Solarium \Torinia~) ccnlaleum. 



Plate B. 



Fig. 1. Solarium abyssorum. 

 Fig. 2. Fluxina Dalliana. 



