446 PYRAMIDELLID A. 
reflexed, and there is a rudimental denticle on the pillar-lip. 
Axis ;/;, diameter ,, uncie. 
This very rare animal is an undoubted Chemnitzia, and 
probably the first of the species that has ever been seen alive. 
To add to the interest of this little narrative, I may state, 
that Mrs. Gulson, who last year allowed me the honour of 
attaching her name to this elegant shell, saw and examined 
her namesake in a living state. 
I have searched in vain for a second example of this rare 
animal, as I am anxious to review it ; however, I do not despair 
of again meeting with it. 
Cu. Bareet, Clark. 
Ch. eximia, Brit. Moll. iv. p. 278, pl. 90. f. 1 (as Rissoa eximia). 
Rissoa eximia, Jeffreys. 
Bath, 17th January, 1851. 
My friend Mr. Barlee presented me some time ago with a 
minute shell, which he considered an unpublished Rissoa, but, 
on examination, I found it had all the conchological characters 
of a Chemnitzia. Mr. Barlee obtained it in the Shetland 
Islands. That the honours due to him may not be taken up 
by some Bathyllus, I insert the following account of it. 
C. testa gracili, alba, costis circa duodecim subrectis instructa, 
anfractibus quatuor rotundatis, quorum primus in sequentem 
reflexus, alter duabus, tertius et ultimus striis tribus spiraliter 
cincti. Apertura subovalis, haud continua, labium columnare 
plica obsoleta, vel penitus abdita, latus externum sine callo. 
Sutura linearis, distincta. Umbilicus vix notatus. Axis +4, 
diameter —!_ uncize. 
30 
Hab. ad insulas Zetlandicas. 
These characters indicate, as far as conchological ones can, 
that the animal, when observed, will prove a Chemnitzia. 
The outer lip is without the callus of most of the Rissoe ; the 
apex is undoubtedly reflexed, a character which is generally 
the concomitant of the Chemnitzie. I believe no example of 
a Rissoa with a similar apical structure is known; we may 
say that there is not a single essential character of the Rissoe 
in this species. It is a congener of Chemnitzia excavata: 
