1894. PROCEEDINGS OF THE NATIONAL MUSEUM. 683 



given by tlie deep insertion of the columellar muscle, I was unable to 

 withdraw any part of the animal in good condition until after cutting 

 into the penultimate whorl with a file and severing the muscle with a 

 fine scalpel. This is a very interesting form, evidently related to some 

 of Verrill's Fleurotomellce, but differing in important respects as may 

 be seen by the generic diagnosis. It should be remembered that 

 Verrill's type is P. paclcardij which differs considerably from most of 

 the species afterwards referred to the group. An examination of speci- 

 mens of Pleurotomella agassizii, Verrill, showed tbat the oral opening 

 in that species did not markedly differ from other species of Fleuro- 

 tomidce and the tentacles were eyeless and cylindrical. The specimen 

 being a female, the forms of the verge, which often offer good charac- 

 ters, could not be compared, but Verrill describes it in F.pacMrdi as 

 "very large and long, round, nearly cylindrical, except near the tip, 

 where it tapers; in alcoholic specimens it is nearly as thick as the neck, 

 from which it arises."* It will be observed that this description does 

 not accord closely with the characters in Spergo. 



The shell figured is a young one with uneroded apex. It is less than 

 half the size of the largest collected, but was chosen for figuring 

 because it showed the characters more clearly. 



SPERGO DAPHNELLOinES, new species. 

 Plate XXXI, fig, 11. 



Shell small, thin, polished, with a pointed Sinnsigera nucleus of three 

 and a half whorls and six subsequent whorls; nucleus bright yellow 

 brown, often caducous, leaving the white internal callus to represent 

 it, which being molded on the interior of the nuclear whorls, is \)o\- 

 ished and smooth, while the original nucleus has oblique reticular 

 curved sculpture; sculpture much like that of S. glandini/ormis, but 

 having the whorls appressed at the suture lower on the antecedent 

 whorl, the riblets more prominent, less oblique, and higher on the whoi-1, 

 the fasciole more deeply impressed and its sculpture indicating a deeper 

 sinus, and the fine spiral grooving continuous and uniform over the 

 whole surface of the shell; whorls rounded, the last inflated with the 

 outer lip greatly i^roduced, as in BaphneUa, and the sinus pronounced; 

 pillar straight, brown tinted, canal shallow, narrow; outer lip thin, 

 smooth and glassy within, sharp edged. Length of shell, 23; width at 

 the periphery of the last whorl, 10; length of last whorl, 17.5 mm. 



Station 3476, in 298 fathoms. No. 107015a, U.S.I^.M. 



Two specimens of this pretty little shell were obtained, which have so 

 much the general color and surface of 8. glandini/ormis, that at first 

 they were passed over as the young of that species. When both came 

 to be studied carefully it was evident at once that they were distinct. 

 The present species is more acute, more drawn out in coil, and more 



* Verrill, Trans. Coim. Acad., v, p. 454. 



