166 LITTORINID^. 



A form allied to, but distinct from, F. fenestratuSf A. 

 Adams. 



Sub-genus COUTEOUYIA, A. Adams. 

 Ann. Mag., 1S60, type C. deetissata, A. Adams. 



A fossil species of Coidliouyia is the Lacuna disjtmcta, 

 Rainc. and Munier, 1863. 



16. Fossar [Couthouyia] reticulatus. 



Fosf3ar reticulatus, ^. ^(fam-y, P. Zoo/. 1853, p. 186, Singapore, p. XX, Jiff, 

 13 ; from Japan, op. cit.1863 ; r=F. insignis, O. ^ H. Nevill, J. As. Soc. 

 Beng., 1871, Ceylon, long. 6\, diani. 5 mil. 



The two nuclear wborls are smooth, and the other four more 

 or less coarsely reticulate in this species, 



12 Hongkong; coll. R. Huugerford, Esq. ["at 10 fths."]. 



var. persoluta. 



1 Japan ; ex Mr, Damon [coll. A. Adams; labelled " C. retloulata"']. 



The last -whorl is considerably less ventricose and more 

 " solute" than in the original figure of the Singapore type ! 

 Long. 5|, diam. 3 mil. 



var. delicatula. 



2 Bombay ; coll. Rev. S. B. Fair bant. 



Rather smaller and of thinner texture ; umbilicus a little 

 less defined ; apparently, one or two fewer of the spiral ribs. 



17. Possar [Couthouyia] striatulus. 



Couthouyia striatula, A. Adams, P. Zool. S. 1863, YohuTco \Japa\i\, 25 fths. 



1 Japan ; ex Mr. Damon [coll, A. AdamS — Long. 2^, diam. Ij mil.] 

 1 Arakan ; coll. Dr. Stoliczka. 



18. Fossar [Couthouyia] decussatus. 



Cour.houyia decussata, A. Adams, Ann. Mag. 1860, Mino-Sima. 



1 Japan; ex Mr. Damon [coll. A. Adams]. 

 Long 2|, diam. 1 mil. 



