1870.] MR. W. HARPER PEASE ON THE GENUS TRIPHORIS. 773 
B. Peetoral fins low down on the sides of the body, narrow and 
elongate ; second and third fingers very long, of nine or ten 
phalanges; head swollen, subglobular. Globiocephalidee : 
Grampus, Globiocephalus, Spherocephalus. 
II. Pectoral fin short, broad, rounded or truncated at the end, shorter 
than the arm-bones ; second finger rather the longest, the rest 
gradually shorter, second finger with six or eight phalanges. 
1. Orcadee: Orca, Ophesia. 2. Belugidee: Beluga, Monodon. 
3. Pontoporiidee : Pontoporia. 
5. Remarks on the Genus Triphoris (Desh.), with Descrip- 
tions of new Species. By W. Harper Pease, C.M.ZS. 
Fighty-eight species of the above genus are known (including the 
following), distributed as follows:—East Indies and Polynesia, seventy- 
three; Australia, six; Panama, one; West Indies, four ; Mediterranean, 
two ; localities unknown, two. 
Of the species described by M. Deshayes inhabiting the island of 
Bourbon, two are synonyms of Polynesian species ; two of those de- 
scribed by Prof. Adams from Panama are synonymous, and the re- 
maining one a Cerithiopsis*. I also exclude several described 
under the above genus, which prove to belong to Bittium. 
Mr. Hinds having collected a large number of species during the 
voyage of the ‘Sulphur,’ classified them according to shape. A more 
natural and certainly more distinct arrangement would be according 
to sculpture, with which the disposition of colours also agrees, Of 
one section, the species are encircled by two or three rows of granules 
or beads, and the colours regularly disposed ; the other, those which 
are smoothly keeled, colours mottled. 
Colours in this genus, and their arrangement, are constant, and 
may be relied on as a specific guide. 
With few exceptions, the specimens from which the descriptions 
heretofore published have been drawn up were imperfect or imma- 
ture. In consequence, probably, of greater advantages in collecting, 
I have obtained perfect specimens of thirty-six species, and of a large 
number in all stages of growth. The spire becomes developed early 
snd remains constant ; the last whorl and outer lip pass through se- 
veral stages of growth. The young are planulate at base, the shell 
of a pyramidal form; as the last whorl is developed and assumes its 
normal form, the outer lip unites at base with the whorl and is pro- 
duced in the shape of a tubular canal ; posteriorly a perforation is 
formed at its junction with the body-whorl, though frequently only 
a broad sinus is left. The edges of the perforation are generally 
slightly everted ; and on four species only, so far as I am aware, it 
is produced in tubular shape, similar to the basal canal, viz. T. mira- 
* Teste Carpenter, P. Z. 8. 1863, p. 350. 
