MOLLUSCA. 
467 
and simple on each side in Chiton ; but in Patella it is slender, 
atid near its origin divided into two almost equal branches, a 
true branchial and a muscular. The arrangement of the ante- 
rior upper, the posterior upper, and the under pharyngeal gan- 
glions, with their commissures, is quite similar in both genera ; 
but in Chiton there is one additional pair, which may be called the 
anterior under pharyngeal ganglion, situated on a large arched 
vascular trunk in the hind part of the neck. The author thinks 
that the results of his researches favour the idea of a real affinity 
between Chiton and Patelloy and that there is no fundamental 
difference in Chiton from the other mollusks. Bull. Ac. Sc. St. 
Petersb. xiii. pp. 457-466, with figures. 
Tecturid.®. 
Tectura viryinca (Miill.) at Algiers; Pat. gussoni (Costa) may be the 
same species. Weinkauff, Conch, d. Mittelm. ii. p. 406. 
Tectura tahitcnsis, sp. n., Tahiti, and conoklalis, sp. n., Roratonga isl., Pol}’^- 
nesia. Pease, Am. Jourii. Conch, iv. p. 98, pi. 11. ligs. 21, 22. 
Acmcea schrcncldi, sp. Patella granostriata of Schrenck, not Reeve, 
Lischke, Mai. Blfitt. xv. p. 220, Nagasaki. 
Gadiniid^. 
Gadinia garnoti (Payr.). Weinkauff states that this is not Innn^’s Patella 
mammillaris, as its sculpture is decussate, not simply striate. Conch, d. 
Mittelm. ii. p. 176. 
Patellid4?. 
Patella spinosa (?), guttata (Orb.), crenata (Gniel.), radiata (?), and den- 
ticulata (Martyn ?). Lingual dentition, by Hogg, Transact. Roy. IMicroscop. 
Soc. xvi. pi. 12. figs. 66, 68, 69, 70, and 71; Patella pellucida (1j.), fig. 67. 
Patella. The Mediterranean species, with their synonymy and varieties, 
are enumerated by Weinkauff', Conchyl. d. Mittelm. ii. pp. 401-406. The 
true P. vulgata does not occur in the Mediterranean. 
Patella ? cmavginuhides, sp. n., Philippi, Mai. Blatt. xv. p. 224, Straits of 
Magellan. Gills could not be found. 
Ijcpeta cceca (Miill.). Lingual dentition by Hogg, Transact. Roy. Mi- 
croscop. Soc. xvi. pi. 12. fig. 72. 
Chiton. J. Reincke has made researches into the development of the 
spines in the edge of the mantle. Siebold u. Kolliker’s Zeitschr. xviii. 
pp. 305-321, pis. 21, 22. 
Chiton fidvus (Wood), cincrcus (L.), piccus (Gmel.), echinatus (Barnes), 
and undulatus (Q. & G. ?). Lingual dentition by Hogg, Transact. Roy. 
Microscop. Soc. xvi. pi. xii. figs. 61-65. 
TECTIBRANCIIIATA. 
ToRNATELLIUyE. 
Pingicula huccmea (Pe\\\Qd)—aiiriculata (Menard), Weinkauff', Couch, 
d. Mittelm. ii. p. 205. 
