20 
Tom Iredale. 
1901 — Bothriembri/on martensii Kobelt, Syst. Conch. Cab., (Mart. & Chemn.'i 
cd. Kustcr, Bd. 1., Abth. 13 (2), p, 704, pi. 112, figs. 3, 4, (sheet 
dated 21 VI. 1901). Now Holland. 
Throng'll lack of specimens this species has been overlooked, a different 
species being ligun'd by Reeve, but with doubt, yet lie has been followed. 
If the description had lieen studied, the shell would have been recognised as 
it is really iiuite good: “Shell ovate, perforate, solid, striate, whitish marbled 
with I'ose, cuticle thin, olivaceous, suture delicately circulated; whorls with 
two oliscure posterior bands; throat roseate; ]ieristome a little thickened; 
axis anteriorly deep brown. Axis Ih'i; diam. % unc.” 
The size and proportions do not fit any other species than the following. 
AVhen it is realisi'd that Robert Brown was on (loose Island, one of the 
Recherche Croup, where this kind of slu'll is common, its recognition is easy. 
Reeve figured a diftVrenl shell under Cray’s name, but he doubted the a.ssocia- 
tion, and he was right in that doubt, as his specimen almost certainly came 
from the I’ei'th di, strict. Rossiter also collected specimens in the Recherche 
Grouji, and one of these was named by Pilsbry as the Coxian locality “King 
George's Sound” misled him. The remainder of Rossiter’s specimens in the 
Brazier collection are labelh'd “Recherche Group.” 
One of the most interesting revelations of Australian conchologieal 
science was made by Tlr. A. P. Basset Mull, who visited the Recherche Group, 
with the assistance of Messrs. Henry Grant and J. H. AVright of the Aus- 
tralian Aluseum. Many s])ecimens were collected on the mainland at Esper- 
ance, and on the eastern islets of the Archipelago. They found that each 
locality showed a definite variety, and these are illustrated and diagnosed 
here. 
At first sight these recall the King Gc'orge Sound melo, but are larger, 
and restricting rhodoMomns to the western islands of the R(‘cherche Archi- 
pelago, those from the eastern ones are here described. 
The Guntim Island shells may be called B. rhodostomus hullianus 
subsp. nov. The groiuul colour is pale brownish cream, a reddish brown band 
below the sulure follow(>d by a ])ale band, and then another reddish brown 
band above the periiihery with a similar red brown patch around the 
umbilicus. The aiierture g(‘net'ally (lale creamy white inside, sometimes 
purplish, the columbella pale or dark purplish brown, rarely white. A strong 
wrinkling below the suture gives the subsutural red band a streaked appear- 
ance. In form, they are r'oundly elongate, the spire being about equal in 
length to the aperture. Some thirty si'ecimens are still available, of which 
two are unicolor, the others constant. The \ariation in measurements is; 
35 mm. in length by 13 mm. in breadth (type), ’H by 20, ,)4 by 1/ and 31 by 
20 mm. One shell from Rob Island (Mondrain) is smaller with the ground 
colour pinkish white, lu'avily strc'aked with purplish brown, the aiierture and 
columt'lla imi'iilish, and ]>robably conu's nearc'st. true vhodoHomus. 
A long;*]' series from Charlev Island shows moia' variatioji, the darker 
shells being brownish cream, longitudinally heavily streaked with dark 
brown, some are less heavily mai’kod, the .streaking being fewc!’, and bands 
showing through so that one almost agre(>s with the Gunton Island shell, ana 
some are even unicolor. In the other direction, the sti'caks tend to coalesce 
until the last whorl is imactically uniform dark purplish brown. The aper- 
ture varies in coloration, according to the exterior, from white with a rose 
columella, and outer lip internally, through pale reddish to dark purple. In 
shape some are comparatively plump while others have the spire lengthened. 
