1901.] MOLLUSKS FROM THE PERSIAN GULF. 459 



DENTALIEM PSEEEOHEXAGOXUM Desh. 



I. Karachi. 



Dentaliem qeadeiapicale Sowb. 



P.G-. Gulf of Oman, Maskat. 5-15 fathoms, mud. 



M.C. Generally distributed. 



Dentalium semipolitum Sowb. 

 P.G. Linjah anchorage. 5 fathoms, soft mud. 

 Dentalium seb-toequatum Fschr. 



P.G. Kais (or Gais) Island. 15 fathoms, mud ; also lat. 26° 

 50' N., long. 52° 50' E. 



Cadeles eeloides 1 , sp. n. (Plate XXIV. fig. 24.) 



C. testa alba, nitlda, hiflexa, Icevissima, postice attenuata, antice 



trans medium tumidula ; apertura rotunda, posteriore parva, 



rotunda, margine tenui, acido. 

 Long. 10, diam. oris 1*25 mm. sp. maj., diam. apicalis - 50 mm. 



Hab. Gulf of Oman, lat. 24° 49' N., long. 58° 56' E.. 345 

 fathoms, mud. Karachi (one example). 



Larger than C. gadas Mont., which we have not seen north of 

 Bombay. It is a very smooth white shell, in some examples 

 ringed obscurely with cinereous grey, in others pure white, in- 

 curved, shining, posteriorly attenuate, from the centre to the 

 mouth tumid, aperture round, margin acute. It was dredged 

 very abundantly in the locality above given. 



Cadelus gades Sowb. 



I. Bombay (Abercrombie). Extremely abundant in shell-sand. 



A third species is likewise reported near Karachi that is deserving 

 of further study. 



We Follow Pilsbry (Man. Conch, xvii. p. 142) in considering 

 that Cadulus should stand on its own merits and not be merely 

 subservient to Siphonodentalium M. Sars. In his opinion, however, 

 it is only the anterior constriction below the aperture which can 

 be said to separate it generically. 



EXPLANATION OF THE PLATES. 

 Plate XXI. 



Fig. 



1. Milrn {Turricula) calundrum, 



p. 420. 

 ■_'. Coralliophila rubrooooeinea, 



p. 401. 



3. .( ■. , ■'. i>. 872. 



4. Manguia (Glyphostoma) obtusi- 



Fig. 



7. Columticlla (Mitrella) nomudica, 



p. 101. 



8. Turritetla fultoni, p. 378. 



9. 'L\ rcbi a riiipidla, p. IL'S. 



10. ,, /'''''."'. p. 128. 



1 1. Drillia resplenaens, p. 439. 



oottata, p. 404, \'i. Conus clytospvra, p, ISO. 



nbella i \fiirella) aiizona, 

 p. 408. 

 6. I • rebra ma wndn wi, p, 128. 



13, 15. Btrombus beluchi&ruu, p, 380. 



14. Drillia /» rsica, p, 489. 



. i Xtj i mo- : the reaemblanoe to a white maggot it realistic 



