216 ASPIDOBRANCHIA. CAPULIDA. 
Emarginula rubra, Lam. Hist. Nat. des Anim. sans Vert. vi. 
partie u. 7? 
Habitat in mari Dorsettensi Australi. 
Shell oval, cancellated, covered with a fuscous-brown epider- 
mis; inside rosy ; its vertex acute, very much recurved or sub- 
involuted. Height three-eighths of an inch ; the length rather 
less. 
Inhabits the southern coast of Dorset in Poole Harbour. 
This new species was lately discovered by my friend Mr. 
Thomas Bell, and although I have pledged myself in the Intro- 
duction ‘‘ to have described no Species that has not come under 
my individual inspection,” yet as I am so perfectly assured of 
his accuracy, I have in this description, which I have lite- 
rally copied from his own description in the Journal above 
quoted, broken my pledge for the first time. These are the 
only recent Species that have hitherto been discovered. 
FAMILY III. CAPULID. 
Testa obliqué conica, anteritis recurva, apice uncinato sub- 
spirali. Apertura plis aut minus rotundata. Impressio mus- 
cularis elongata, arcuata, transversa, intus ad limbum posticum ? 
Animal: tentacula duo, conica, externa basi oculis duobus. 
Branchie propé collum, infra limbum anticum cavitatis unior- 
dinate. 
The shell oblique conic, recurved anteriorly ; its apex unci- 
nated, subspiral; its aperture more or less rounded; the mus- 
cular impression elongate transverse arcuate withm at the pos- 
terior margin? 
The animal with two conic tentacles, externally with two eyes 
at their bases; the branchiee situated near the neck placed 
within the anterior border of the branchial cavity in a single 
series. 
The animal is attached to its shell by a circular muscle divi- 
ded anteriorly for the exit of its head and the aperture leading 
to the branchial cavity. The branchiz are composed of many 
