284 SUBEMARGINULA. 



Subemarg inula arabica A. Adams. Shell whitish, thick, depressed- 

 conical, vertex ohtuse, subcentral, inclining backward ; latticed 

 with tuberculose radiating ribs and elevated transverse lines; mar- 

 gin of aperture thick, crenate, sinuate in front, sinus produced into 

 a canal inside. Bed Sea. (Ad. P. Z. S. 1851, p. 90, no. 10). 



Subemarginula catillus A. Adams. Shell elongate-oval, much de- 

 pressed, vertex little elevated, inclining backward ; ornamented 

 with thick nodulous radiating ribs and transverse lines of growth ; 

 margin of the aperture irregular, crenulated, callous inside, deeply 

 sinuate in front. Hab. unknown. (Ad., P. Z. S. 1851, p. 91, no. 14.) 



Subemarginula denticidata A. Adams. Shell elongate-oval, white, 

 9-radiate, vertex acute, inclining backward ; 9 thick rugulose 

 radiating ribs ; intervals having asperulate longitudinal riblets ; 

 margin of the aperture dentate and denticulate, emarginate in 

 front, sides of incision thickened, produced in front in two teeth. 

 Mexico. (Ad. I. c., p. 91, no. 15.) 



Emarginula ' (Clypidina) radiata Gould, Proc. Bost. Soc. N. H. 

 vii, p. 163.=? Em. australis Linn, teste Tenison-Woods, Proc. Linn. 

 Soc. N. S. Wales, ii, p. 256. 



Emarginula pileata Gld. Loo Choo. 



Emarginula altilis Gld. Kagosima Bay, 10 fms. 



Emarginula textilis Gld. Ousima. 



Unfigured species, described in Proc. Bost. Soc. N. H. vii, p. 162. 

 163. 



Subemarginula picta Dunker. 



(Em. picta Dkr. Moll. Jap. p. 24, t. 3, f. 15 ; Ind. Moll. Mar. 

 Jap. p. 152.) 



Allied to Em. pulchra A. Ad., probably a synonym of that furm. 

 S. arconatii Issel. (Mai. Mar. Ross. p. 232.) Unfigured. 



Gulj of Akaba. 

 Subemarginula rugosa H. Adams, (P. Z. S. 1872, p. 10, t. 3, f. 7.) 



The name of this supposed new species is preoccupied by Quoy. 

 Subemarginula modesta H. Adams, (I. c. p. 10, t. 3, f. 8). 



This form is doubtless a synonym of an East Indian species. 

 Both this and S. rugosa H. Ad. were described under Emarginula. 



Section Tugalia Gray. 



Tugalia Gray, Guide Syst. dist. Moll. B. M. 1857, p. 163.— Tugali 

 Gray, olim. 



