112 



RET. 11. BOOG WATSON' ON THE 



MoLLUscA or H.M.S. ' Challbn-&eb ' Expedition-. — Part XVI I . 

 By the Eev. Egbert Boog "Watson, B.A., F.E.S.E., F.L.S., &c. 



[Published by permission of the Lords Commissioners of the Treasury.] 



[Read March 1, 1883.] 



Earn. PTBAMlDELLlDiE, Gray. 



EuLiMA, Risso. I Stylifer, Broderip. 



EULIMA. 



1. E. 



2. E. 



3. E. 



4. E. 



5. E. 



6. E. 



7. E. 



8. E. 



9. E. 



10. E. 



11. E. 



12. E. 



psila, n. sp. 

 fasciata, n. sp. 

 chmmax, n. sp. 

 chascanon, n. sp. 

 hians, n. sp. 

 ephamilla, n. sp. 

 oxytata, n. sp. 

 acanthyllis, n. sp. 

 acerrima, n. sp. 

 sarissa, n. sp. 

 latipes, n. sp. 

 famelica, n. sp. 



13. E. 



14. E. 



15. E. 



16. E. 



17. £. 



18. E. 



19. E. 



20. E. 



21. E. 



22. E. 



23. E. 



chyta,xi. sp, 

 campyla, n. sp. 

 fallax, n. sp. 

 chydcea, n. sp. 

 cylindrata, n. sp. 

 gomphus, n. sp. 

 hyalina, n. sp. 

 amblia, n. sp. 

 AeAes, n. sp. 

 dissimilis, n. sp. 

 eurychada, n. sp. 



The tip of the apex in Ealima is so cliaracteristic, that I felt it 

 was desirable to supply the measurement of this part in each 

 case; but it is obvious such a measurement, when talien in 

 profile, caunot be satisfactory because of the uncertainty as to 

 the aspect under which the observer has viewed it. I have 

 therefore given the breadth of the 

 first whorl as seen from a point in 

 the line of the axis, reckoning for the 

 first whorl here, as in all other cases, 

 the part cut ofi'by the line d h, in which 

 case the bread this of course the dis- 

 tance from a to c. 



3r 





■I 



EuliTna; tip of the shell, ace; 

 the first whorl cut off by a 

 straight line, d b. Breadth 

 at the first whorl, a c. 



1. Etjlima psila, n. sp. (\pi\6s, bare.) 



St. 24. March 25, 1873. Lat. 18° 38' 30" N., long. 65° 5' 30" W. 

 Off St. Thomas, N. of Cuiebra Island, Danish W. Indies. 390 f ms. 

 Coral-mud. 



Shell. — Small, thin, hyaline, straight, very smooth, narrow and 

 sharp, with longish base and mouth aud small rounded tip. 

 Sculpture. None whatever, the surface being perfectly smooth 

 and glossy. Colour transparent glassy white. Spire high, nar- 

 now, and quite straight. Apex small, but not really sharp, 



