246 BULLETIN OF THE 



C. With one principal spiral. 



T. Eushii Dall. An anterior row of 16 very large and pointed (almost 

 spinous) tubercles next the suture; behind this three much finer and lower 

 undulated equal threads; no ribs; whorls flat except for the garland of tuber- 

 cles; shell milk-white, small. 



The last mentioned, though only a fragment of four and a half whorls, pre- 

 sents such a remarkable and peculiar sculpture that I have no hesitation in 

 applying a name to it. The length along the axis from the garland of tuber- 

 cles on one whorl to its fourth return, thus including three whorls, is 2.6 mm.; 

 the width over the tubercles at the apical end (decollate) was 1.5 mm., and at 

 the other end (of four whorls) it was 1.75 mm. The turns are rather oblique, 

 and the undulations of the fine threads form oblique transverse series. It was 

 collected by Dr. W. H. Rush, in 200 fms., west of North Bernini Island, 

 Bahamas, and kindly donated by him to the National Museum. 



Triforis (Inella) longissima Dall. 



Plate XX Fig. 10. 



Triforis (Ino) longissimus Dall, Bull. M. C. Z. ( IX. p. 80, 1881. Agassiz, Three 

 Cruises of the Blake, II. p. 71, fig. 295, 18S8. 



Habitat. Sigsbee, off Havana, in 175-450 fms. 



In this and several other cases I was led, by the careless practice of authors 

 who have erroneously treated the name Triforis as masculine, to give the spe- 

 cific names in my Preliminary Report a masculine termination. 



Triforis (Inella) triserialis Dall. 



Plate XX. Figs. 5 a, 6 a. 



Triforis triserialis Dall, Bull. M. C. Z., IX. p. 84, 1881. 



Habitat. Yucatan Strait, 640 fms. Off Cape San Antonio, 640 fms. Sta- 

 tion 2, in 805: fms. Station 282, near Barbados, in 154 fms., sand, bottom tem- 

 perature 56°. F. 



Triforis (IneLla) triserialis var. aspera Jeffreys. 



Triforis aspera Jeffreys, P. Z. S. 1885, p. 58, pi. vi. figs. 7, 7 a. 



Habitat. North Atlantic, Porcupine Expedition. Mediterranean, Jeffreys. 

 Florida Straits, off the Samboes, Pourtales, in 125 to 731 fms. Off Georgia 

 in 440 fms., sand, U. S. Fish Commission. I have compared Jeffreys's types 

 with the type of T. triserialis, and consider the differences varietal. 



