NO. 2 NEW TURRITID MOLLUSKS BARTSCH IQ 



marked by fine lines of growth. The spiral sculpture consists of a 

 raised, slightly submedian cord on the first turn, which at its junction 

 with the axial ribs renders this sharply nodulose. This keel has a 

 tendency to bifurcation, which becomes complete on the next turn, 

 where two nodules are present, and on the last turn an additional nodule 

 appears on the periphery. In addition to these spiral cords the entire 

 surface of spire and base is marked by closely spaced microscopic 

 spiral striations. Suture moderately constricted. Periphery well 

 rounded. Base moderately long, marked by a feeble spiral thread 

 below the periphery and another near the columella. The columella is 

 slender and marked by eight poorly expressed spiral threads. The 

 aperture in the only specimen at hand is fractured. I am therefore 

 unable to give a description of the features covering this part of the 

 shell. The inner lip is decidedly sigmoid. 



Type. — U.S.N.M. no. 429437, collected at station 37 in 160 to 200 

 fathoms between latitude i8°i3'5o" N., longitude 6y°2,9'2o" W. and 

 latitude i8°ii'55" N., longitude 67°42'5o" W. It has eight whorls 

 remaining and measures : Length, 9.1 mm ; diameter, 3 mm. 



Its characters are nearest to those of an undescribed species from 

 the south side of Cuba. It is also distantly related to Glyphostoma 

 ( Glyphostomops) hendersoni. 



COMPSODRILLIA PETERSONI, n. sp. 



Plate 5, figs. 6, 7, 9 



Shell very elongate-conic, bluish white. Nuclear whorls 2.5, the 

 first two well rounded, smooth, the last half crossed by a number of 

 distantly spaced axial riblets. Postnuclear whorls well rounded, the 

 first with two nodulose spiral threads, the second with three, of which 

 the median is the strongest. These remain throughout the length of 

 the shell. In addition to this the appressed summit of the shell appears 

 as a spiral cord. The posterior sinus is narrow and located immedi- 

 ately below the spiral cord at the summit. In addition to the strong 

 spiral cords finer spiral threads are present both in the sinal sulcus 

 near the summit and on and between the ribs anterior to this. In ad- 

 dition to the spiral sculpture the whorls are marked by axial ribs 

 which have their beginning in the nodulose spiral threads on the first 

 postnuclear whorl. These axial ribs are slightly protractively slanting. 

 They extend but very slightly posteriorly to the posterior sulcus, and 

 evanesce anteriorly on the base of the last whorl. They are more 

 than twice the width of the spaces that separate them. Of these, 10 

 occur upon the first to seventh, 12 upon the eighth to tenth, and 14 



