MELVILL AND STANDEN: SHELLS FROM LIFU. 315 
semipellucidis fenestralibus vittatis catents spiraliter suc- 
cincto, apertura oblonga, apud basim latiore, labro extus 
recto, simplice, margine columellart uniplicato. 
Long., 4, Lat., 150 mull. 
A curious species, which, of plain appearance, is relieved 
by a spiral band on the last whorl, just above the middle, of 
semi-pellucid window-like filleted catenations ; this is not, so far 
as we can make out, owing to any less deposit of shelly matter, 
but the whole substance, while as thick, is rendered semi- 
transparent by some process that needs further study. We do 
not know of this character in any other species. Many speci- 
mens. To this, one of the most interesting of this consign- 
ment, we append the name of the discoverers, the Rev. James 
and Mrs. Hadfield. | 
SS 
The Shell-Boring of Carnivorous Gastropods.—The statement 
sometimes made that Purpura and other carnivorous mollusca instinctively 
bore their holes over the wzta/ parts of their victims is held to be refuted in 
the new Cambridge Natural History, by a figure which represents diagram- 
matically the approximate position of the holes bored by Purpura in about 
one hundred specimens of Mytilus. The drawing shows the holes to be dis- 
tributed with tolerable evenness over all parts of the valves. I have obtained 
the same evidence from an examination of a large number of Ze//ina albinella 
similarly bored. The refutation, however, does not seem to be clearly 
established from the above evidence, seeing that a hole in any part of the 
shell of a Mytilus or Tellina would enable a Purpura with its long proboscis 
to reach from one end to the other. If we can find instances of mzzstakes 
having been made and labour lost, it will be more conclusive. Woodward 
in his Manual of the Mollusca, mentions such an instance; the case being 
that of a fossil-spine of a sea-urchin which has evidently been bored by a 
Gasteropod. Also, in my own collection, I have a specimen of Chzome 
lamellata (Lam.), the lamellze of which have been bored twice, whilst a 
third hole has been drilled so near the edge that it, too, would have been 
useless had it been but 7: of an inch nearer the outside of the shell. It 
would seem from these cases that Purpura bores at random. — LEWIS 
SHACKLEFORD. (Read before the Conchological Society, March gth, 1896). 
Albino forms of Littorina rudis var. tenebrosa.—In a creek in 
Brancaster Bay, near Hunstanton, I came upon several individuals of the 
above form. As it appears to be new, I would suggest the name Zenedrosa- 
pallida. ({ am aware that this is somewhat Hibernian, but it seems 
unavoidable).—LioneL E. Apams, Northampton. (ead before the Con- 
chological Society, Aug. 7th, 1895). 
