MOLLUSCA. 
537 
by small knots instead of by spines, this form is better regarded as merely a 
variety.] 
Murex clavus (Kien.) found at Mauritius. Brewster, Transact. B. Soc. of 
Arts and Sciences of Mauritius, vol. iii. p. 111. 
Murex crtspus (Brod.), Bunker, Novitat. Concliol. p. 125, pi. 42. figs. 1, 2. 
— M. aduncospinoms, sp. n., Bunker, ibid. p. 126, pi. 42. figs. 3, 4. Locality 
unknown ; very near to M. trunculus (L.), 
Murex hidalgoi, sp. n., Crosse, Journ. Conch, xvii. p. 408, West Indies. — 
M^irex pazij sp. n., Crosse, 1. c. p. 183, West Indies. 
Murex troscheli (Lischke), from Nangasaki, Lischke, Moll. Jap. p. 40, 
pi. 1. figs, 1, 2 5 M. sinensis (Reeve), from Japan, larger than usual, Lischke, 
ibid. p. 43. 
Murex foveolatus, sp. n.. Pease, Am. Joum. Conch, v. p. 83, pi. 8. fig. 3, 
La Paz, Gulf of California. 
Typhis tetrapterus (Bronn) found gregarious on seaweed in the Gulf of 
Spezia. It appears to change its locality according to the season of the year, 
retiring in the cold season to deeper places. Caramagna, Bull. Mai. Ital. ii. 
pp. 108-170. 
Trophon muricatus (Mont.)=i^<5ws cancellatuSy Bivona, cchinatus 
(Phil.), and 2’. carinatus orifC) —vaginatus calcar (Scacchi), both 
in the Mediterranean. Tiberi, Bull. Mai. Ital. ii. p. 263. 
JJrosalpinx Jloridana, sp. n., Conrad, Am. Joum. Conch, v. p. 100, pi. 12. 
fig. 4, Tampa Bay. 
\JEuplem'a^ Ranella (subgenus Eupleura) tampaensis (Conrad, as Murex, 
1846), figured by the author. Am. Journ. Conch, v. p. 106, pi. 12. f. 6. 
[It has been proved by the radula that Eupleura does not belong to Ranella, 
but to the Muricidce ; therefore Conrad’s first view was the most correct.] 
PURPURIDiE. 
According to the researches of Prof. Troschel, the radula of 
this family is very similar to that of the Muricidee. In the re- 
stricted genus Purpura the median plate is longer than broad, 
five-toothed, the median tooth hollow. lopas has a similar 
radula, but the median tooth has a longitudinal fissure. In 
Stramonita the median plate is broader than long, and the me- 
dian tooth projects more than the others ; the number of teeth 
is variable, but only three are large. Thais and Tribulus are, 
with regard to the radula, not essentially different from Stramo- 
nita. In Polytropa, including Trochia (Swains.) and Cronia 
(Ad.), the median plate is also broader than long, and has five 
larger teeth. Purpura haustrum (Martyn) belongs, as far as its 
radula is concerned, to Polytropa, P. chocolatum (Duclos) to 
Stramonita, Chorus xanthostoma (Brod.) to the Muricidm. The 
author describes and figures the radula of the following spe- 
cies : — 
Purpura patula (L), lopas sertum (Lam.), Stramonita chocolatum (Buclos), 
jloridana (Conrad), hicostalis (Lam.), undata (Lam.), hcemastoma (L.), rus- 
tica (Lam.), hlainvillii (Besh.), consul (Chemm.), Thais nodosa (L.), Tribulus 
1869. [vol. VI.] 2 p 
