526 



EEV. E. BOOG WATSON ON THE 



more attenuated, has a gibbous swelling, and not a mere equable 

 enlargement, and has both openings much smaller. 



From C. Jeffreysi, Monter., it differs still more strongly in these 

 very respects, except that this is nearer it in size. 



5. Cadulijs geacilis, Jeffr. ; J. Gwyn Jeffreys, Ann. Sf Mag. 

 Nat. Hist. 1877, xix. p. 157. 



St. 75. July 2, 1873. Lat. 38° 37' N., long. 28° 30' W. 450 

 fms. Sand. 1 specimen, young. 



St. 78. July 10, 1873. Lat. 37° 24' N., long. 25° 13' W. 

 Off San Miguel, Azores. 1000 fms. Glohiyerina-ooze. 2 spe- 

 cimens. 



St. 85. July 19, 1873. Lat. 28° 42' N., long. 18° 6' W. 

 Canaries. 1125 fms. Volcanic sand. 2 specimens, young. 



Mr. Jeffreys got one specimen in the ' Yalorous ' at St. 13, 

 690 fms. He was good enough to verify my determination of 

 this species. It is very like C. Jeffreysi, Monter. ; but is larger 

 and a little compressed (in the proportion of ^3-) between the 

 convex and concave curves as compared to its breadth, which is 

 not the case in C. Jeffreysi. It is not so swollen, and the poste- 

 rior opening is larger than in that species. 



6. Cadultjs simillimus, W. 



St. 185. August 31, 1874. Lat. 11° 35' S., long. 144° 3' E. 



Raine Island, Cape York. 155 fms. Sand. 2 specimens. 

 St. 187. September 9, 1874. Lat. 10° 36' S.,long. 141° 55' E. 



W. of Cape York. 6 fms. Coral sand. 2 specimens. 



^hell. — Very like C. gracilis ; rather broad, narrowed at both 

 ends, very slightly and symmetrically bent, but a little more 

 towards the mouth, with a very slight bulge, which just shows 

 on the concave curve. It is thin, polished, translucent 

 (weathering opaque), with an opaque ring near the apex. 

 Sculpture. Very minute and faint superficial oblique strisa, 

 with a faint flocculence in the substance of the shell. Mouth 

 rather large, oblique ; edge thin, but rounded. Apical opening 

 small, thin, and chipped. L. 0'16. B. at mouth 0*02, greatest 

 036, at apex 0*014. 



This differs from C. gracilis y Jeffr., in being broader, with a 

 slight bulge on the concave curve, in being a little more bent, and 



