124 
Found plentifully on the rocks and stones at Milton, Devon- 
shire, and other localities. 
7. Sprrorpis corrucatus, pl. LVI, f. 46. 
Spirorbis corrugatus, First Ed., pl. 1, f. 46; Fleming, Edin. 
Ency., VII, p.68; Serpula corrugata, Montagu, p. 502; Maton 
and Rackett, p. 242. 
Shell strong, with rough transverse wrinkles, white, and only 
a small portion of the second yolution visible; centre rather 
deeply umbilicated ; base spreading but little; aperture orbicu- 
lar. Diameter an eighth of an inch. 
It is easily distinguished from S. spirillum, in being con- 
siderably stronger, and the base never spreading so much. 
Found on the slate rocks at Milton. 
8. Sprrorpis corneEvs, pl. LVI, f. 43. 
Spirorbis corneus, First Ed., pl. 1, f. 433 Fleming, Edin. 
Ency., VI, p. 68; Serpula cornea, Adams, Linn. Tr., V, p- 
6, pl. 1, f. 33, 34, 35; Montagu, p. 503; Maton and Rackett, 
p- 243. 
Shell regular, round, subdepressed, pellucid; with three horn- 
coloured yolutions. 
Inhabits the coast of Pembrokeshire. 
9. Sprrorsis Lucipus, pl. LVI, f. 56, 60. 
Spirorbis lucidus, First Ed., pl. 1, f. 56, 60; Fleming, Edin. 
Ency., VII, p. 69, pl. 205, £4; Serpula reflexa, Adams, Linn. 
Tr., V, p- 6, pl. 1, f. 31, 325 Serpula lucida, Montagu, p. 506; 
Maton and Rackett, p. 243. 
Shell irregular in form, more or less spiral, and with two or 
three volutions, sometimes placed laterally, in others they wind 
upon each other, and are often apart, or scalariform; very pel- 
lucid, glossy, and white; aperture orbicular, projecting upwards. 
Diameter half a line. 
Distinguished from all other species by its glassy appearance. 
Found on many of the British and Irish coasts, adhering to 
different species of sertularia and other corallines. 
10. Sprrorsis conicus, pl. LVI, f. 58. 
Spirorbis conicus, First Ed. pl. 1, f. 58; Fleming, Edin. 
Ency., VI, p. 68, pl. 205, f. 3. 
Shell conical, strong, depressed, opaque, dull yellowish-white ; 
two volutions, the exterior one large, with a carina on its 
superior portion, and embracing the other; aperture towards 
the top. 
Found in Zetland, on old shells, by Dr. Fleming. 
11. Sprrorpis rEveRsws, pl. LVI, f. 52. 
Spirorbis reversus, First Ed., pl. 1, f.52; Fleming, Edin. 
Ency., VII, p. 60; Serpula reversa, Montagu, p. 508; Maton 
and Rackett, p. 243. 
Shell more or less spiral, extremely variable, subcylindrical, 
white, with strong, transverse wrinkles, and tapering to a small 
point; aperture orbicular, and invariably turning in the reverse 
direction. 
This is the largest species of the genus. 
Found on the Devonshire coast, and also in the Frith of 
Forth. 
12. SprrorBis annuus, pl. LVI, f. 44. 
Spirorbis annulus, First Ed., pl. 1, f. 44. 
Shell strong, white, opaque, nearly orbicular; with three 
rounded volutions, crossed by strong, regular, transverse, ring- 
like grooves; deeply umbilicated; aperture nearly orbicular. 
Diameter a tenth of an inch. 
MOLLUSCA. 
[Matpaniz. 
I found this adhering to an oyster from Prestonpans, Frith 
of Forth. 
13. SpIRORBIS STRIATULUs, pl. LVI, f. 59. 
Spirorbis striatulus, First Ed., pl. 1, f. 59. 
Shell round, spiruliform, umbilicated; with three yolutions, 
rolled upon each other, the exterior one detached at its exter- 
nal termination; surface with numerous, fine, rib-like, spiral 
strie; aperture quite orbicular. Diameter one-tenth of an 
inch. 
Found at Dunbar, by General Bingham, adhering to sertu- 
laria. 
14. SprRoRBIS CARINATUS, pl. LVI, f. 48. 
Spirorbis carinatus, First Ed., pl. 1, f. 48; Fleming, Edin. 
Ency., VII, p. 68, pl. 20; Serpula carinata, Montagu, p. 502; 
Maton and Rackett, p. 242. 
Shell with the exterior angulated volution provided with a 
dorsal carina; interior volutions concealed by the outer one; 
umbilicated, and sometimes pervious; base slightly spreading ; 
aperture orbicular. 
Found on several of the English and Scottish coasts. 
Famity I]—Matpan ia. 
Branchie of the animal intermediate; tube open at both 
ends. 
Genus 3.—Brocuus.—Brown. 
Shell tubular, subcylindrical, slightly tapering, and subarcu- 
ated; imperforate at the smaller end; aperture orbicular, placed 
at the larger extremity. 
1. Brocuus Tracuirormis, pl. LVI, f. 10. 
Brochus trachiformis, First Ed., pl. 1, £. 10; Brown, Conch. 
Text Book, p. 158, pl. 19, f. 25; Dentalium Trachea, Montagu, 
p- 497, pl. 14, f. 10; Maton and Rackett, p. 239. 
Shell subcylindrical, tapering a little, slightly arcuated; with 
strong, regular, transverse, annular strie; smaller end imper- 
forate, truncated, and provided with a small, blunt knob; aper- 
ture orbicular; colour ferruginous, somewhat paler towards the 
smaller end. Length somewhat more than an eighth of an 
inch; diameter about a fifth of its length. 
Found on the Devonshire and Welsh coasts, but is a rare 
and very local species. 
2. Brocuus striatus, pl. LVI, f. 13. 
Brochus striatus, First Ed., pl. 1, f. 13. 
Shell white, subcylindrical, a little arcuated, and rather 
abruptly tapering to the narrow end, which is destitute of a 
knob; whole surface covered by fine, close-set, annular striz ; 
aperture large, nearly orbicular. Length not an eighth of an 
inch; diameter about a fifth of its length. 
This differs from the B. trachiformis, in being shorter, less 
arcuated, in the strie being much finer, and in haying no knob. 
Found at Dunbar, by General Bingham. 
3. Brocuus reETicutatus, pl. LVI, f. 11. 
Brochus reticulatus, First Ed., pl. 1, f. 11. 
Shell cylindrical, abruptly tapering towards the base, where 
it is provided with a rather long knob ; whole surface covered 
by annular and longitudinal strie ; aperture large and orbicular. 
Length an eighth and a half of an inch; diameter of aperture a 
fourth of its length. 
