recently described by Mr. F. P. Marrat. 345 
intermediate between OQ. todesina, Duclos, and O. tspidula. 
The O. todesina is merely a variety of O. carneola, Lamarck, 
which very variable shell presents every form intermediate 
between the. typical broadly angulated carnelian-coloured 
specimens and the narrow, oblong, cylindrical, dull-purple, 
reticulated ones. Some of these varieties are well figured b 
Reeve; and Mr. Marrat’s description of O. faba answers well 
to some of them and to others I have seen. 
Oliva blanda, Marrat.—I am much disposed to think that . 
this is but a variety of O. %spidula. ‘The more or less swollen 
condition of the columellar lip is a very variable character : 
specimens of the white variety of O. ¢spidula present it in a 
marked degree. 
Oliva cylindrica, Marrat.—The description of this shell 
- answers well to the var. a of O. irisans figured by Reeve. 
O. trisans is an exceedingly variable shell, and its forms have 
even not yet been completely worked out. 
Oliva pallida, Marrat.—I believe this to be a variety of O. 
seripta, which species is mainly distinguished from some va- 
rieties of O. literata and O. reticularis, which closely resemble 
it, by its short spire and pale aperture. 
Oliva oblonga, Marrat.—Is not this the shell figured by 
Reeve under the name of O. fusiformis ? , 
_ Oliva truncata, Marrat.—I cannot help thinking this is 
merely a variety of O. polpasta, which, in its turn, I am much 
disposed to believe is merely a variety of O. reticularis, and 
that it is connected with that species. by numerous indefinable 
variations. ‘The mere circumstance of locality would not in 
itself be any evidence -of specific distinctness. The Olives 
present many remarkable anomalies in this respect: for ex- 
ample, O. cruenta inhabits the Philippines, Zanzibar, Australia, 
and the Society Islands—widely diverse localities. O.Duclost 
is found at the Philippines and at the Society Islands. 0. re- 
ticularis occurs in California and in the West Indies—all 
strangely different habitats. 
With respect to Mr. Marrat’s other two species, viz. O.ornata 
_ and OQ. similis, I will say nothing, sufficient evidence being 
wanting; but I must confess to being somewhat suspicious as 
to their specific value. 
Clifton, near Bristol, 
March 30, 1868. 
Ann. & Mag. N. Hist. Ser. 4. Vol. i. 25 
