40 GASTEROPODA. BULLADZ. 
longitudinally with whitish. A variety sometimes occurs which 
is of a pure white. Colour of the animal pale yellow, testa- 
ceous, or brownish; its surface smooth. 
2. SCAPHANDER CATENATUS. 
S. testa catenis longitudinalibus, parallelis sculpta. 
Habitat in Danmoniz mari rarissimus. 
Shell elegantly sculptured, the prominent parts representing 
a number of chains placed parallel to each other. Length one 
eighth of an inch. 
The only specimen of this shell that I have seen was taken 
in the Plymouth Sound in deep water, by the late Mr. J. Cranch, 
who assured me that he had formerly met with a similar shell 
in Salcombe Bay. It has quite the air of the preceding species, 
excepting in the form of its second whorl, which is less inflated. 
3. ScAPHANDER BrRownil. 
S. test punctis excavatis, elongatis, acuminatis sulco connexis 
et in lineas longitudinales digestis, sculpta. 
Habitat cum preecedente. 
Shell sculptured with excavated, elongate, and acuminate 
dots, which are connected by a groove, and arranged in longi- 
tudinal les. These lines of excavated dots vary much in size ; 
they are very regular towards the upper part of the spire, but 
are alternately wide and narrow at the other extremity, where 
the dots are often altogether obliterated, and their place sup- 
plied by a simple line. 
A single specimen of this shell was found by Mr. Cranch in 
the Plymouth Sound, in a bed which contains the S. lignarius 
in great profusion. The Provost of Eton possesses two other 
specimens. Length a quarter of an inch. 
Named after Captain T. Brown, who is now preparing a work 
on British Conchology. 
Genus 17. HAMINS[EA. 
Testa duriuscula, ovato-ventricosa ; spira abscondita ; aper- 
tura anticée hians; umbilicus nullus. Ventriculus testis tribus 
