260 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 



diella Fischer, 18S3; and also iucludes a large number of Bellardi's species of 

 Homotonia according to Cossnianu, who makes the group under the name of 

 Bellardiella a subgenus of Daphnella which he thinks has a similar nucleus. It 

 is curious that, while the figure of the nucleus given by M. Cossnianu (that of 

 Murex textilis Brocclii) correctly illustrates the nucleus of Daphnella, the nucleus 

 of Bellardiella gracilis is entirely different. It is irregularly coiled and swollen, 

 without sculpture, except for the puuctations which are a feature of the whole 

 surface of this species, and on the last whorl, which assumes a strong peripheral 

 carina before the mature sculpture begins to be developed. The nucleus of 

 Daphnella, on the other hand, is a typical ^' Sinusigera." So it would seem as if 

 Bellardiella {gracilis), whether it agrees with the typical form of Defraucia 

 (= Clathurella) or not, can at least not be united with Daphnella on account of a 

 similarity of its nuclear characters. 



As three of Millet's five species are the victims of a more or less complicated 

 and possibly doubtful synonymy, and no type was mentioned in the original 

 publication, it is best to take as type one of those which seem free from uncer- 

 tainty, and preferably his largest and first species, Defrancia pagoda (pi. 9, 

 fig. 1). It should not be forgotten, however, that Millet himself points out that 

 the subsutural callus mentioned in his diagnosis is not invariably present. As 

 Clathurella takes the type of Defrancia, the species just mentioned will serve the 

 substituted generic name in the same capacity. 



Glyphostoma Gabb, 1872. Shell small, fusiform, elegantly and profusely 

 sculptured; aperture varicose, columellar lip lirate or denticulate, the outer lip 

 similarly ornamented; sinus deep and conspicuous, canal moderately produced 

 and recurved, operculum absent; nucleus conic, of a few polished uuicariuate 

 wiiorls. Type G. dentifera Gabb. 



This group is related to Clathurella, from which it differs by the dentate or 

 lirate pillar lip in the adult, and the very conspicuous anal sulcus. The species 

 assigned to it have a common facies which cannot be mistaken when once recog- 

 nized, and having usually a brilliant surface polish, are among the most elegant of 

 small gastropods. The suture is less constricted and the whorls less rounded 

 than in Clathurella. 



El'bela Ball, 1889. Shell small, thin, glossy, polished, the outer lip sharp, 

 simple, arcuate ; pillar and inner lip simple, canal inconspicuous, reduced to a 

 mere angle as in Trichotropis, operculum wanting, nucleus of the Sinusi(jfera type ; 

 anal sulcus at the suture, very inconspicuous and shallow. Type Daphnella 

 (Eubela) limacina Dall. 



The typical species has a pretty garland of nodules in front of the suture but 

 this proves to be merely a specific character. 



ScRCULiNA Dall, 1908, nov. Shell of moderate or small size, slender, elongate- 

 fusiform, the earlier whorls feebly ribbed or axially sculptured^ the later ones with 

 fine even spiral sculpture; spire acute, suture appressed, aperture long and nar- 

 row ; both lips perfectly simple ; jiillar straight, outer lip gently arcuate, anal 



