REPORT ON THE GASTEROPODA. 



647 



a very slight twist on its front edge and a minute umbilical chink behind ; the lip is not 

 emarginate in front. L. 0*15. B. 0*1. Greatest breadth of mouth in front, 0"05. 



There has been some confusion regarding this species, perhaps in consequence of the rarity of 

 the third volume of Poll's Molluschi by Chiaje, which is rarely to be found in even the best public 

 libraries. There is no Bidlina undata in Chiaje's work. Adams in his Genera, vol. ii. p. 8, quotes 

 Bullina undata, Brug. (see Encycl. method, vers, vol. i. p. 380, sp. 16, which = Bulla nitidula, 

 Dill., p. 483, and Bullina clcgans, Menke, Syn. Method, 2d ed., p. 125 ; see also Mart., Conch. Cab., 

 vol. i. p. 283, Vign. on p. 174, pi. xiv. figs. 4, 5), as that figured by him at pi. lvi. figs. 5, 5a., but 

 in the explanation of the plate, vol. iii., he attributes the " Bullina undata " of figs. 5 and 5a. to 

 Chiaje, Poli, vol. iii. pi. xlvi. fig. 29, but in Adams, plate lvi. figs. 5 and 5a., it is obvious that two 

 quite different shells are presented. Of these 5a. represents probably Bulla scabra, Chem., while 

 fig. 5 is certainly copied from Chiaje, as stated, only the copy is bad as introducing a distinct- 

 whorled spire, while Chiaje's original presents only a minute dome-shaped tip. In the text, Chiaje 

 at p. xx. bis, p. xliii., and at p. 27, describes the shell and animal he had figured (in pi. xlvi. figs. 

 29, 30) as Bulla pisum, Feruss., Dictionnaire classified d'histoire naturelle, p. 573. 



What the Bulla •pisum, Feruss., may be, I do not know ; Chiaje's species, so called, is obviously 

 not a Bidlina (which is a mere synonym for Aphistrum), and may probably be Bulla striata, 

 Brug. In any case he has no Bullina undata. Adams' Bidlina undata is a hopeless confusion 

 throughout. In these circumstances I have considered the Challenger shell as a new species, and 

 have given it the name of Professor Seguenza, who individualised and figured, though he did not 

 describe it. 



5. Utriculus, Brown, 1844. 



1. Utriculus mamillatus (Philippi). 



2. Utriculus planospira (A. Adams). 



3. Utriculus, n. sp., Wats. 



4. Utriculus spatha, Wats. 



5. Utriculus laucus, Wats. 



6. Utriculus complanatus, Wats. 



7. Utriculus tornatus, Wats. 



8. Utriculus amphizostus, Wats. 



9. Utriculus oryctus, Wats. 

 10. Utriculus famelicus, Wats. 



Species. 



11. Utriculus simillimus, Wats. 



12. Utriculus (Tornatina) canaliculatus (Say). 



13. Utriculus (Tornatina) valuta (Quoy and 



Gaimard). 



14. Utriculus (Tornatina) leptekes, Wats. 



15. Utriculus (Tornatina) acrobeles, Wats. 



16. Utriculus (Torimt ina) avenarius, Wats. 



17. Utricidus (Tornatina) aratus, Wats. 



18. Utriculus (Tornatina) amhoinensis, Wats. 



19. Utriculus (Tornatina) pachys, Wats. 



1. Utriculus mamillatus (Philippi). 



Bulla mamillata, Philippi, Enumeratio Moll. Sicil., vol. i. p. 122, pi. vii. fig. 20, vol. ii. p. 95. 

 „ (Tornatina) mamillata, Adams in Sowerby's Thcs. Conch., vol. ii. pt. 11, p. 566, sp. 13, pi. exxi. 



fig. 26. 

 Cylichna mamillata, Forbes and Hanley, Brit. Moll., vol. iii. p. 514, pi. cxiv. (c. ) figs. 4. 5. 

 Utriculus mamillatus, Gwyn Jeffreys, Brit. Conch., vol. iv. p. 420, vol. v. pi. xciv. fig. 1. 

 „ „ Monterosato, Enumerazione, p. 50. 



„ „ Seguenza, Form. Terz. Calabria, pp. 251, 351. 



February 10, 1873. Tenerife, Canaries. 75 fathoms. 



