90 RISSOIDE. 
2 Mauritius; coll. G. Nevill, Esq., and Surgeon-Major Power [8%, 
42). 
1 Roweiah [Red Sea]; coll. J. B. Baxter, Esq. (93. 52]: operculum, 
thin and horny-brown. 
This variety principally differs from Schwartz’s figure in the 
absence on the antepenultimate whorl of the longitudinal fur- 
rows; the characteristic denticulations within the outer lip are 
well marked in the Mauritian specimens, they are unaccount- 
ably wanting in Garrett’s magnified figure, though “ crenula- 
tions within the peristome ” are duly recorded in his description ! 
The Red Sea form is considerably stouter and broader than 
any of the other known ones, as can be seen from the above 
recorded measurements. 
69. Rissoina japonica. 
Rissoina japonica, Weinkauff, Conch.-Cab. II, 1881, pl. 154., fig. 1, Japan, 
long. 34, diam. 12 mil. 
3 Japan [type]; ex Mr. R. Damon. 
Long. 3, diam. 13, mil.; from the collection of the late A. 
Adams, Esq., and labelled “‘ RB. pulchella, A. Adams.” 
70. Rissoina montrouzieri. 
Rissoina montrouzieri, Souverbie, J. de C., 1862, N, Caledonia, long. 154 
diam. 43, anfr, 11.;=R. supracostata, Garrett, P. Ac. Phil., 1872, 
pl. 2, fig. 1, Viti, long. 10 mil.; ?=R. striolata, A. Adams, var, 
4, N. Caledonia; ex c. P. Bouvier, Esq. 
5 Andamans [153, 5]; coll. J. Wood-Mason and G. Nevill, Esqrs. 
Very close to R. striolata, A. Ad., Philippines, apparently only 
specifically separable by the constantly, markedly more developed 
sculpture of the upper whorls. The longitudinal ribs are in 
this form absent from the last four whorls, asin the type. 
Several of the Andaman specimens show the characteristic and 
peculiar dark “coating” so accurately described by Souverbie 
as “un enduit noir épais, analogue a celui quirécouvre certaines 
Mélanies;” this is especially the case with var. substriolata, 
subvar. Monstrosa, nov. 
Ki. deformis, Sow. Junr. in Reeve, fig. 63, not R. deformis, Sow. Senr, in 
Genera of Shells, and Schwartz. 
