Allied to the preceding variety by its ribs dfliu' upper postnuclear whorls, but distinguished 

 by its subconcave upper part of back of last whorl, which bears 4 rather broad, white nodules 

 below the suture, paill\- desceiuliui; as bUiiU ribs, ending in ;i partly developed keel on that back. 



Alt. 11 iMiU. 



Though too nearly allietl to make a new si)ecies of this only specimen, I think it differs 

 sufficiently to deserve a varietal name. 



var. puclla Reeve. 



Reeve. Conch. Ic. Vol. XI, Columbella, fig. 65. 



Trvon. Man. of Conch. Vol. V, p. 145, PL 52, fig. 79. 



KOBELT. Martini-Chemn. Conch. Cab. Ed. II, Vol. Ill, Columbella, p. 95. 



Stat. 4. Djangkar (Java). 9 M. Coarse sand. 2 Spec. 



Stat. 12). Bay of Pidjot, Lombok. 22 M. and less. Mud, coral and coralsand. 4 Spec. 



Stat. 47. Bay of Bima, near South fort. 55 M. Mud with patches of fine coralsand. 9 Spec. 



Stat. 53. Bay of Nangamessi, Sumba. Up to T)^ M. Coralsand. i Spec. 



Stat. 64. Kambaragi-bay, Tanah Djampeah. Up to 32 M. Coral, coralsand. i Spec. 



Stat. 71. Makassar and surroundings. Up to 32 M. Mud sand with mud, coral. 3 Spec. 



Stat. yj. Borneo-bank. 59 M. Fine grey coralsand. I Spec. 



Stat. 142. Laiwui, coast of Obi Major. 23 M. Mud. i Spec. 



Stat. 205. Lohio-bay, Buton-strait. 22 M. Sandy mud. 14 Spec. 



Stat. 261. Elat, West coast of Great Kei-island. 27 M. Mud. 2 Spec. 



Stat. 311. Sapeh-bay, East coast of Sumbawa. Up to 36 M. Mud and sand, i Spec. 



Stat. 313. East of Dangar Besar, Saleh-bay. Up to 36 M. Sand, coral and mud. 15 Spec. 



I have kept separate as var. ptiella the shells which are strongly ribbed, with 2 brown 

 bands and think they deserve this rank, as these characters sufhce for the Siboga-materials to 

 distinguish them ; if it were not that many notorious authors assert the contrary, I should 

 incline to give them specific rank; C. iodostom'a Gaskoin (Reeve 1. c. fig. 218) is no doubt very 

 nearly allied. 



15. Columbella (Atilia) undtilata n. sp. PI. XX, fig. 11. 



Stat. 47. Bay of Bima, near South fort. 55 M. Mud with patches of fine coralsand. i Spec. 

 Stat. 105. 6°8'N., 121° 19' E. Sulu-archipelago. 275 M. Coralbottom. 4 Spec. 



Shell fusiform, with rather long, acuminate spire, subtransparent, yellowish-white; whorls 

 8Y2, of which about 2 form a smooth nucleus. About 2 postnuclear whorls with straight ribs, 

 lower on smooth, last whorl subangulate, with short, subsutural plicae, more conspicuous on the 

 back; these plicae are crossed by a few subsutural, spiral striae. The whorls are but slightly 

 convex, the spire is attenuate above, suture conspicuous. Aperture oblong, obtusely angular 

 above, ending below in a rather long and wide canal, which is spirally grooved externally; 

 peristome simple, with a broad, flat varix externally, smooth internally, columellar margin 

 enamelled, smooth. 



Alt. 13Y2, lat. 4Y4; apert. alt. (with canal) 5, lat. 1^5 Mill. 



This species is still allied to the preceding one, but may be distinguished by the spiral 



89 



SIBOGA-EXPEDITIE XLIX ' (/. 44 



