54 Moll. 
MOLLUSCA. 
HaLIOTIDA!]. 
Scissurella crispata (Flem.) var. = angulata (Loveu) = aspera (Phil.) 
Sars, 1. c. p. 126, pi. viii. fig. 7 ; radula, pl.iii. fig. 4 ; operculum, pi. xviii. 
fig. 1. 
Scissurella, sub genus Schizotrochus : operculum very thin ; Monterosato,. 
J. de Conch, xxvi. p. 149. 
GYGLOBBANOHIA. 
G. O. Saks proposes the name “ Onychoglossa instead of Docoglossa 
for an order of Gastropods, including the Patellidce, Tecturidce, and 
Lepetidoe, but excluding the Chitonidce ; he characterizes it by the radula 
being very long and narrow, its median and lateral part rather indistinct, 
middle plates with a recurved solid opaque unguiform tip, marginal hooks 
2, 3, or 0. Moll. arct. Norveg. p. 118. 
AcMAillDJ]. 
Tectura rubella (Fabr. us Patelki), Sars. Moll. arct. Norveg. p. 121, 
pi. viii. fig. 6 ; radula, pi. ii. fig. 11. 
Tectura unicolor (Forbes), Mediterranean, distinct from virginea (Mull), 
Monterosato, J. de Conch, xxvi. p. 148. 
Patellid^. 
Patella vulgata (L.). J. Clarke Hawkshaw has observed the method 
in which it sinks pits in and abrades the surface of the chalk at Dover, 
probably by action of the radula ; the limpets do more to destroy the 
rock surface than the sea ordinarily does ; they rasp close round any hard 
object such as a piece of shell or flint imbedded in the chalk and return 
regularly to the same resting-place, to which their shell becomes per- 
fectly adjusted. J. L. S. xiv. pp. 406-411. 
Patella ociilus (Born) = schrceteri (Krauss), radiata (Born) = capcnsis 
(Krauss), and fusca (Born) = cenea (Marty n) ; Brauer, SB. Ak. Wien, 
Ixxvii. Abth. i. pp. 188 & 190. ^ 
Nacella parva, sp. n., Angas, P. Z. S. 1878, p. 863, pi. liv. fig. 12, South 
Australia. 
Scutellina fulva (Mull), radula ; Sars, Moll. arct. Norveg. p. 122, pi. ii. 
fig. 12. 
Lepeta caeca (Mull), radula; id. 1. c. p. 123, pi ii. fig. 13. 
Propilidium ancyloide (Forb.) ; id. 1. c. p. 121, pi. xx. fig. 18. 
CniTONlDiE. 
H. V. IiiERiNG describes the muscular fibres, and the renal and genital 
organs of Chiton ; Morph. JB. iv. pp. 128-146, with 2 pis. 
