4 
THE VOYAGE OE H.M.S. CHALLENGER. 
is very large, the glans covered with small rather soft cones ; at the base of the glans is 
a peculiar wing-like process ( check-wing ). 
Phylliroe, Peron et Lesueur. 
Phylliroe, Peron et Lesueur, Ann. du Museum, t. xv., 1810, p. 65, pi. ii. figs. 1-3. 
,, Bergli, Malacolog. Untersucli. (in Semper, Reisen im Archip. d. Philipp., Th. II. Bd. ii.), 
Heft v., 1873, p. 210. 
Eurydice, Eschscholtz, Isis, 1825, I. col. 737, Taf. v. fig. 6. 
Pliilyrine, Menke, Zeitschr. f. Malacozool., 1844, p. 73. 
Cauda corporis postice truncata. 
Phylliroe differs from Acura in having a short truncated tail. The string-shaped spawn 
of several species is known, as well as the early stages of development. 1 
Several species of this genus, chiefly from the open sea, have been described ; most of 
them, however, will in all probability turn out eventually to be identical, 2 and perhaps the 
majority are circumsequatorial. I have examined individuals from the Indian Ocean 
which appeared to be identical with the common Atlantic form. 3 
1. Phylliroe bucephala, Peron et Lesueur. 
Mediterranean, Atlantic. 
' 2. Phylliroe atlantica, Bergh. 
Atlantic, Indian Ocean. 
3. Phylliroe rosea, d’Orbigny. 
Pacific. 
4. Phylliroe lichtensteinii, Eschscholtz. 
Pacific (near Sandwich Islands). 
5. Phylliroe punctulata, Quoy et Gaimard. 
Pacific: 
4 ' 6. Phylliroe rubra, Quoy et Gaimard. 
- Indian Ocean. 
7. Phylliroe amboinensis, Quoy et Gaimard. 
Bergh, loc. cit., pp. 236-241, Taf. xxix. figs. 16-21, Taf. xxx. figs. 2-5. 
Indian Ocean, Philippines. 
1 A. Schneider, Ueher die Entwickelung der Phyllirhoe bucephalum, Archiv f. Anat. u. Physiol., 1858, pp. 35-37, 
Taf. iii. A. 
2 MacDonald, Ann. and May. Nat. Hist., ser. 2, vol. xv., 1855, pp. 457-460. 
3 Bergh, loc. cit., pp. 229-231. 
1 The bracket indicates my opinion that the species thus connected are more closely related than the others ; perhaps 
even varieties of one species. 
