1901.] 



MOLLUSKS FROM THE PBUSIAN GULF. 



459 



Dentalium pseudohbxaqonum Desh. 

 I. Karachi. 



Dentalium quadriapicale 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. 

 Dentalitjm subtorquatum I'schr. 



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

 50' N., long. 52° 50' E. 



Cadulus euloides \ sp. n. (Plate XXIV. fig. 24.) 



C. testa alba, nitida, injlexa, Icevissima, postice attenuata, antice 



trans medium tumidula ; apeHura rotunda, posteriore parva, 



rotunda, marrjine tenui, acuto. 

 Long. 10, diam. oris 1*25 mm. sp. maj., diam. apicalis 0'50 mm. 



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

 fathoms, mud. Karachi (one example). 



Larger than G. gadus 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. 



Cadulus gadus 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 Cadidus should stand on its own merits and not be merely 

 subservient to Siphonod.entalium 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. 



Fig. 



1. Mitra {Turricula) caliendrum, 



p. 420. 



2. Coralliophila rubrococcinea, 



p. 40L 



3. Argyropeza divina, p. 372. 



4. MangUia {Glyphostoma) obtusi- 



costata, p. 404. 



5. Columhdla {Miirella) alizoncs, 



p. 403. 



6. Terebra Tnacandrewi, p. 428. 



Plate XXI. 

 Fig. 



7. Colmnhella (Mitrella) noviadica, 

 p. 404. 



8. Turritella fultoni, p. 378. 



9. Terebra, cognata, p. J 28. 



10. „ fellyi, p. 428. 



11. Drillia resplendens, p. 439. 



12. Conus clytospira, p. 430. 



13. 15. Strombus beluchiensis, p. 380. 



14. Drillia persica, p. 439. 



^ evXi] eiSos : the resemblance to a white maggot is realistic. 



