28 



The embryonic shell of this species is caducous; it has been figured, however, by Fol ') 

 and by Pki.seneer "). Like the latter I have seen it on an adult specimen, but as may be seen 

 from the figure (PI. I, fig. 17), I remarked two constrictions behind the partition, which 

 separates the embryonic portion from the rest of the shell. 



Troschel (see the list of synonyms) has described and figured two "species", which to 

 my opinion must be referred to Clio striata. Both these forms are young stages. Troschel 

 noted in " Creseis phaeostoma' the anus on the right side, but from his description it may be 

 inferred, that he has mistaken the genital duct (if this really exists already in such young 

 forms) for an intestine. 



Subgenus Stvliola Lesueur. 

 1825. Styliola Lesueur, in: DE Blainville, Manuel de Malacologie, p. 655. 



4. Clio (Styliola) subtila (Qoy and Gaimard). 



1825. Styliola recta Lesueur, in: DE Blaiwille, Manuel de Malacologie, p. 655 (name only). 



1827. Cleodora siibula Qoy et Gaimard, Observations Zoologiques faites a bord de TAstrolabe, 



etc., Ann. d. Sc. Nat., ser. i, vol. X, p. 233, pi. VIII A figs. 1—3- 



1828. Creseis spinifera Rang, Notice sur quelques Mollusques nouveaux, etc., Ann. d. Sc. 



Nat., ser. i, vol. XIII, p. 313, pi. XVII, fig. i. 



1828. Creseis snbida Rang, Ibid., pi. XVIII, fig. i. 



1836. Hyalaea sjibula d'Orbigny, Voyage dans TAmerique meridionaie, vol. V, p. 119, 



pi. VIII, figs. 15 — 19. 

 1S50. Styliola subiila Gray, Catalogue of the Mollusca in the collection of the British Museum, 



prt. II, Pteropoda, p. 17. 

 1852. Cleodora subulata Souleyet, Voyage de la Bonite, Zoologie, vol. II, p. 192, pi. VIII, figs. 5 — 9. 

 1852. Styliola subulata Fischer, Manuel de Conchyliologie, p. 437. 



1888. Clio (Styliola) siibula Pelseneer, Chall. Rep. LXV, p. 57. 



1889. Cleodora (Styliola) subulata Dall, in Bull. U. S. Nat. Mus., vol. XXXVII, p. 80. 



Living animals: 



Stat. no. 4° 34' N., 122° o' E. 12 spec. 



Stat. 128. 4° 27' N., I25°25'.7E. i spec. 



Stat. 148. 0° i7'.6 S., 129° i4'.5 E. i spec. 



Stat. I77^ 2° 30' S., 1 29° 28' E. 3 spec. 



Stat. 185. 3° 20' S., I27°22'.9E. I spec. 



Cho subula has been recorded by the Siboga Expedition only from the Celebes Sea and 

 the Ceram .Sea. It does not seem to be very abundant. 



Subgenus Clio Linne. 



1767. Clio Linne, Systema Naturae, 12th ed., p. 1094. 



1 8 10. Cleodora Peron et Lesueur, Histoire de la F"amille des Mollusques Pteropodes, Ann. 

 Mus. Hist. Nat. Paris, vol. XV, p. 66. 



1829. Balantiuin Anonymous, Journ. Roy. Inst., vol. XV, p. 220. 



i) Sur le dcvcloppement des Pteiopodes, .'\rch. d. Zool. Exp., s^r. i, vol. IV. 

 2) Challenger Rep. LXV, p. 55, pi. II, fig. 3. 



