MOLLUSCA* 
63 ^ 
Scala (^Opalia?) zelehori (Dunker), Reis. Novar. Moll. pi. 1. fig. 6. 
Opalia spongiosa and retiporosa, spp. nn., Carpenter, Proc. Calif, Acad, Nat. 
Sc. 1866, p. 222, California. 
PrOBOSCIDIFERA GYMNOGLOSSA. 
Pyramidellidas. 
Our knowledge of this family, as well as of Rissoidm, has been 
considerably advanced by Mr. Jeffreys, who has worked out the 
known species with their synonyms. The peculiarity that the 
first or top whorls are sinistral is taken by him as the principal 
character of the family. 
Odostomia (Flem.). Mr. Jeffreys gives an elaborate monograph of this 
genus in its widest sense (Brit. Conchol. iv. pp. 107-174). It coincides with 
Turhonilla of Lov^n, including Chemnitzia (Orb.) and EuUmella (Forbes). 
The author opposes the attempts of some recent conchologists who manu- 
facture new genera on the most trivial grounds. The British species are, 
according to him, the following : — 
A. Typical Odostomi<B, Oval or oblong, generally smooth or only spirally 
striated, a few reticulated j pillar slightly curved, and invariably furnished 
with a tooth. 
1. minima (Jeffr.), the smallest species known ; 2. nivom (Mont.) 
drica (Alder, F. & H.) = awwes (Macg.) j 3. truncatula (Jeftr.); 4. clamla 
(Loyin) ) lukisi (Jeffr.); Q. albella (Lov4n) =mso«c?e5, var., pi. 96. 
f. 5 of Forbes & Hanley; 7. rissoides (H.anlej)—scalaris (Macg. not 
Phil.), with the varieties alba (Jeffr.), nitida (Alder), glabrata (Forb. 
& Hanl., but not Mhlfld. & Phil.), dubia (Jeffr.) ; 8. pallida (Mont.) 
^eulimoides (Hanl.) = osc^7m^s (Lovdn), varieties are crassa (Thomps.), 
notata and angusta (Jeffr.) ; 9. conoidea (Brocchi) =s/c*«Za and erythrcsa 
(Phil.) ; 10. umbilicaris (Malm) ; 11. acuta (Jeffr.), a variety=^m6^- 
licata (Alder) ; 12. conspicua (Alder) ; 13. unidentata (Mont.) ; 14. 
turrita {H.?nd\.ej)= unidentata, var. 1, of Forb. &Hanl., a variety of it 
is striolata (Alder) ; 15. plicata (Mont.) ; 16. insculpta (Mont.) ; 17. 
diaphana (Jeffr.) ; 18. ohliqua (Alder), a variety of it = warreni 
(Thomps.) ; 19. dolioliformis (Jeffr.) ; 20. decussata (Mont, as Turbo). 
B. Turbonilla or Chemnitzia. Elongate, longitudinally ribbed or reticulated ; 
pillar straight and seldom furnished with a tooth. This tooth has been 
observed in Nos. 26, 30, and 31. 
21. clathrata (Jeffr.), very rare ; 22. indistincta (Mont.) = ballice (Thomps.) 
==curvicostata (S. Wood); 23. mterstincta (Mont, not Adams) =c?es- 
hayesiana (R^cluz), varieties are terebellum (Phil.) and suturalis (Phil, 
as Rissoa) — oblonga (Macg.) ; 24. spiralis (Mont.); 26. eximia (Jeffr.) 
^■barleei (Clark); fenestrata (Forbes) (Bunker) ; 27. 
excavata (Vhi\.)—harveyi (Thomps.); 28. scalaris (Phil.), a variety 
of it=rufescens (Forb.) ; 29. rufa (V\dl.)=fasciata (R^cluz), a variety 
oi \t=fidvocin6ta (Thomps.); 30. lactea (L.)—elegantisshna (Mont.) 
=icampanellce (Phil.); 31. pusilla (Phil, not C. B. Adams). N.B. O. 
formosa (Jeffi-.) is a distinct species, but its habitat uncertain. 
C. EuUmella. Elongate, smooth, and polished ; pillar straight, very rarely 
furnished with a tooth (No. 33). 
32. scillce (Scacchi) = crasstJa (J^^.) = macand7'ei (Forbes) ; 33. acicvla 
2 N 2 , 
