1797. Rheda Humphreys, Museum Calonnianum. 



1801. Hyalaea Lamarck, Systeme des anim. sans vertebres, p. 139. 



18 10. Archonta Denis dc Montfort, Conchyliologic Systematique, vol. II, p. 50. 



18 1 5. Tricla Okcn, Lchrbuch der Zoologie, vol. I, p. 327. 



1825. Pleitropus Eschscholtz, Bericht iiber die Zoologische Ausbeute vvalirend der Reise von 



Cronstadt bis St.-Peter und Paul, Oken, Isis, Bd. I, p. 735. 

 1842. Diacria Gray, Synopsis of the contents of the British Museum. 

 1859. Orbignyia A. Adams, On synonyms and habitats of Cavolinia, Diacria and Plcuropus, 



Ann. and Mag. Nat. Hist., ser. Ill, vol. 3, p. 45. 



Subgenus Diacria Gray. 



Hyalaea (part.) Auctorum. 



Plcuropus (part.) Auctorum. 

 1850. Diacria (part.) Gray, Catalogue of the Mollusca in the collection of the British Museum, 



prt. II, Pteropoda, p. 10. 

 1886. Hyalaea, A. Boas, Spolia atlantica, Bidrag, etc., p. 91. 



1888. Diacria Pelseneer, Chall. Rep. LXVI, p. 21. 



I. Cavolinia (Diacria) trispinosa (Lesueur). 



1821. Hyalaea trispinosa Lesueur, in: DE Blainville, Diet. d. Sci. Nat., vol. XXII, p. 82. 

 1827. Hyalaea mucronata Quoy et Gaimard, Observations zoologiques faites a bord de 



TAstrolabe, etc., Ann. d. Sci. Nat., ser. i, vol. X, p. 231, pi. VII 5, figs, i — 2. 

 1832. Hyalaea depressa Bivona, Descrizione di una nuova specie di Jale, etc., Efemeride 



scientifiche e litterarie per la Sicilia, p. 57, pi. I, figs. 4 — 5. 

 1841. Hyalaea cuspidata Delle Chiaje, Descrizione e notomia degli animali senza vertebre 



del Regno di Napoli, pi. CLXXX, figs, i — 2. 

 1850. Diacria trispinosa Gray, Catal. of the Moll, in the Coll. British Museum, prt. II, 



Pteropoda, p. 10. 

 1850. Diacria mucronata Gray, Ibid., p. 11. 



1853. Hyalaea reeviana Dunker, Index Molluscorum, etc., p. 2, pi. I, figs. 17 — 20. 

 1858. Plcuropus trispinosHS A. and H. Adams, The Genera of recent Mollusca. vol. II, p. 611. 

 1858. Pleuropus inucronatus A. and H. Adams. Ibid. 

 1879. Pleuropus trispinosa Pfefter, Uebersicht der auf S. M. Schift" "Gazelle'", etc., Monatsber. 



Berl. Akad., 1879, p. 236, fig. 6. 

 1 886. Cavolinia trispinosa Locard, Prodrome de conch\-Iiologie frangaise, p. 22. 



1889. Cavolinia (Diacria) trispinosa Dall, in Bullet. U. S. Nat. Museum, XXXVII, p. 82, 



pi. LXVI, fig. 115. 



Empty shells: 



Stat. 59. io°22'.7 S., i23°i6'.sE. 2 spec. 



Stat. 88. o°34'.6N., 119° 8'.5 E. 2 spec. 



Stat. 95. 5°43'.5 N., ii9°4o' E. 4 spec. 



Stat. 100. 6° 11' N., i20°37'.5E. i spec. 



Stat. 102. 6° 4'. I N., 1 20° 44' E. 4 spec. 



Stat. 211. 5°4o'.7 S., I20°45'.5 E. 2 spec. 



Stat. 221. 6° 24' S., 1 24° 39' E. 5 spec. 



Stat. 300. io°48'.6 S., i23°23'.iE. i spec. 



The first name cannot be used, as the title Anomia had been already given to quite other animals; the name Gioinia never occurs again. 

 I have unfortunately not been able to see the paper of GiOENi, and I can only mention the title on the authority of DE Blainville 

 (Diet. d. Sci. Nat. vol. XXII, p. 65, note) and SoULEYET (Hist. nat. Pterop. p. 33, note i). But if really Gioe.ni has used this title, it 

 has the priority over Cavolina. 



