158 PROCEEDINGS OF THE ACADEMY OF [April, 



The type and two otjier specimens are No. 2958, A. N. S. P. The 

 tjT)e is somewhat smaller than the others, both of which have been 

 bored by predaceous snails. 



Clathurella arnica n- sp- 



Resembles C. gracilis. It is less slender and the whorls are shorter 

 and revolve less obliquely. It has the same number of axial ribs 

 and spiral threads, but, as they are relatively larger, they are much 

 more crowded than in C. gracilis. The fine spiral lines between the 

 prominent raised threads are very minute. The lip varix is noticea- 

 bly larger, and the mouth is wider; the callous nodule on the body 

 next to the sinus is much larger than in C. gracilis. 



Length 16.3, diam. 5.25 mm.; aperture 7.5 mm. 



It is allied to C. vendryesiana Dall,^ but the prominent axial ribs 

 over the whole shell differentiate it. 



Type is No. 2913, A. N. S. P. 



Scobinella tristis n. sp. 



The shell is fusiform with turrited spire. The whorls are strongly 

 angular at the shoulder, rather deeply concave between the shoulder 

 and a strong, beaded ridge below the suture. There are four spiral 

 cords in the concavity. At and below the shoulder there are about 

 24, deepl}' beaded spiral cords, the beads arranged in protractive 

 curves. On the penult whorl there are four spirals below the shoulder, 

 which has a bifid spiral. The aperture is very narrow. The outer 

 lip of the type has been broken during the life of the animal, and is 

 thicker than normal, Urate within. The long, straight columella 

 bears two strong, mitriform plaits, and there is the faint trace of a 

 third one. 



Length 45.8, diam. 13, length of aperture 26 mm.; 6 + whorls 

 remain, the upper ones being lost. 



Type No. 2927, A. N. S. P. 



This is a shorter, less graceful shell than S. magiiifica, with the 

 whorls more strongly shouldered, more concave above the shoulder, 

 and with a stronger presutural cord. Scobinella morierei (Cossm.) 

 has a shorter anterior canal. S. ccelata Conrad is smaller and less 

 fusiform. 

 Conus furvoides brachys n. subsp. 



The shell is shorter than furvoides. The last 4 whorls are concave 

 and weakly striate spirally. It stands close to C. concavitectmn 

 B. & P., of Gatun, but that species has more copious and granulous 



1 Proc. U. S. Nat. Mus., XIX, 1896, p. 306, PI. 27, fig. 1. 



