SCUTUS. 
Pratt II. 
Species 2. (Fig. a, Mus. Cuming in Brit. ; b, Sowerby. ) 
ScuTus GranuLatus. Sc. testd breviusculd, subarcuata, 
anticé angustatd, acute sinuatd, radiatim striatas 
postice et ad latera per lineis concentricis sulco, 
obliquos decussantibus granulatd, intus albd. 
THE GRANULATED Scutus. Shell rather short, slightly 
arched, narrow, acutely sinuated and radiately 
striated in front; granulated behind and at the 
sides by concentric lines crossing oblique grooves ; 
white within. 
Lamarck. Anim. s. vert. Parmophorus, No. 3. 
Scutus imbricatus. (var.) Quoy et Gaimard. 
The back and sides are corrugated in the same way 
as in Scutus corrugatus, but more strongly, and the 
front area is radiately striated. The shell is always 
narrower in front than at the back. 

Species 8. (Fig. a. Mus. Sowerby ; 6, Mus. Cuming 
in Brit.) 
ScuTUs CORRUGATUS. 
medio undulatim corrugatd ; lateribus rectis, pa- 
rallelibus, termino subacuminato, 
sinuato, ared anticd radiatim obscure costata. 
Shell oblong, flattened, 
wavily corrugated in the middle; sides straight, 
Sc. testaé oblonga, complanatd, 
margine acute 
THE CORRUGATED Scurus. 
parallel ; end slightly acuminated, margin sharply 
sinuated, anterior area radiately obscurely ribbed. 
Reeve. Proc. Zool. Soc., 1842. 
Hab. Japan. 
The sides are very nearly parallel, in this respect 
differing from the preceding species, which tapers to- 
wards the anterior end, as all the Tugalia do. 

Species 4. (Mus. Cuming in Brit.) 
Scutus previcutus. Sc. testd crassd, brevi, latd, 
glabra, antice angustiord, concentricé striaté, ad 
latera subcorrugatd , margine antico valde sinuato, 
ared anticd tumidd, angustd ; apice subcentralt. 
THE RATHER sHORT Scutus. Shell thick, short, wide, 
shining, narrower in front, concentrically striated, 
slightly corrugated at the sides; anterior margin 
much sinuated, anterior angle tumid, narrow; 
apex subcentral. 
Biaivitie. Bulletin des Sciences, Fév. 1817. 
Parmophorus tumidus. Quoy. 
Parmophorus gibbosus. Anton. 
Hab. Madagascar. 
This shell is broadest at the posterior end, and the 
apex is nearer the centre than in any other species. 

Species 5. (Fig. a, Mus. Sowerby; 6, Mus. Brit.) 
Scurus uneuis. Sc. testa breviusculd, recta, latd, subcom- 
planatd, levigatd, concentricé continuiter striata ; 
lateribus rectis, margine antico laté truncato, vix 
stnuato, ared anticd lata, levigatd. 
Tue Snake Scutus. Shell rather short, straight, 
broad, rather flattened, smooth, concentrically 
continuously striated; sides straight, anterior 
margin widely truncated, very slightly sinuated ; 
anterior area broad, smooth. 
Linnezvus. Systema Nature. 
Patella ambigua. Chemn. 
Scutus antipodis. Montfort. 
Hab. New Zealand. 
The concentric strie being neither waved nor inter- 
rupted is the principal characteristic of this species. 
June, 1870. 
