NO. 2238. NOMENCLATURE OF THE FAMILY TURRITIDAE—DALL. 321 



not included in Millet's original list has been usually but erroneously 

 taken as the type. As neither Millet nor Carpenter named a type, and 

 Carpenter's name automatically takes as type the designated species 

 of Defrancia Millet (•/>. pagoda^ selected by the writer in 1908), 

 Clathurella must be reserved for species having the character of D. 

 pagoda Millet. However, Iredale has shown that Bronn in 1831 pro- 

 posed the name Pleurotomoides for the preoccupied Defrancia of 

 Millet, which must take precedence of Clathurella with the same 

 typical species. Beck proposed Pleurotomina as a substitute for 

 Defrancia in 1847, but it had been used by Gray in 1838 as a sub- 

 family name. This leaves the species placed in Clathurella by Coss- 

 mann, 1896, type C. rava Hinds, without a name, and among the 

 numerous names for small Turritidae one must be sought. The 

 earliest which seems available appears to be Philbertia Monterosato, 

 1884. The curious succession of synonyms is as follows, noting 

 first that Bellardi did not (as has been erroneously stated) pro- 

 pose a name Heterotoma^ and if he had it was preoccupied by Hart- 

 mann in 1844. Then follows Bellardia Bucquoy, Dautzenberg, and 

 DoUfus, 1882, not of Mayer, 1870; Bellardiella Fischer, 1883 (new 

 name for Bellardia), not of Tapparone Canefri earlier in 1883; PhU- 

 hertia Monterosato (p. 132, 1884) ; C ormarmondia Monterosato (p. 

 135, 1884) (new name for Bellardiella) ; Otitoma Jousseaume, 

 1898; and lastly Clathurvna Melvill (April, 1917) (new name for 

 Clathurella) . 



As far as the data are accessible to me Philbertia (from which the 

 later Comarmondia does not materially differ) is the earliest available 

 name for the group included by Clathurella Cossmann not Carpenter, 

 and typified by Pleurotoma hicolor Risso=F. purpurea (Montagu), 

 variety hicolor Bucquoy, Dautzenberg, and DoUfus-}-^. philherti 

 Michelotti, fide Monterosato. Philbertia has the outer lip thickened 

 or varicose. Urate or dentate within when adult, the pillar usually 

 smooth, the nucleus acute, smooth, and rather elevated; the species 

 are small and the sculpture more or less clathrate or sculptured both 

 axially and spirally. 



The nearest group to it is Glyphostoma^ which is large, with a 

 more brilliant surface, a more fusiform profile, more contracted and 

 emphatically armed aperture and different nucleus. Philbertia 

 abounds in shallow temperate waters, while Glyphostoma, receding to 

 the Eocene in time, apparently prefers tropical waters and even con- 

 siderable depths. 



Genus CALLIOTECTUM Dall, 1889. 



A dissection of a better preserved specimen of C. vemicosu^n, the 

 type of this genus, has revealed a minute radula with teeth of the 

 Volutoid type, and the long esophageal caecum characteristic of the 

 3343— 19— Proc.N.M.vol.54 22 



