280 Zoological Society. 



2. A Monograph of Scutus, a genus of Gasteropodous 



MOLLUSCA, BELONGING TO THE FAMILY FlSSURELHD^. 



By Arthur Adams, R.N., F.L.S. etc. 



Genus Scutus, De Montfort. 



Animal with the head proboscidiform ; tentacles thick and subu- 

 late, with the eyes on tubercles at their outer bases ; mantle reflexed 

 over the sides of, and nearly covering, the shell ; sides of foot with a 

 series of short cirrhi. 



Shell oblong, scutiform, flattened ; apex dorsal, obUque, posteriorly 

 incUned ; margin of aperture sinuated in front ; muscular impression 

 horse-shoe shaped, open anteriorly. 



Parmophorus, Blainv. — Dascmus, Rafin. — Scutellites, Auct. — 

 Scutum, Sow. jun. — Partnophora, Desh. — Emarginula, sp. Sow. — 

 Patella, sp. Lamk. 



1. Scutus unguis, Linn. 



Patella unguis, Linn. Mus. Ludovic. Ulric. Regin. p. 69. no. 419. 

 — Patella ambigua, Chtvan.—- Scutus antipodis, Moutf. — Parmo- 

 phorus australis, Lamk. — Parm. elongatus, Blainv. 



Hab. New Zealand. Mus. Cuming. 



2. Scutus elongatus, Lamarck. 



Patella elongata, Lamk. Ann. du Mus. i. p. 310. — Parmophorus 

 elongatus, Lamk. Hist. — Emarginula elongata. Sow. Gen. 

 Hab. East Australia. Mus. Cuming. Also occurs fossil. 



3. Scutus granulatus, Blainv. 



Parmophorus granulatus, Blainv. Bullet, des Scienc. 1817; Lamk. 

 Hist. An. s. Vert. vol. vii. pt. ii. p. 5 ; Reeve, Conch. Syst. pi. 139. f. 4. 

 Hab. Port Essington, on the rocks, low water. Mus. Cuming. 



4. Scutus corrugatus. Reeve. 



Parmophorus corrugatus. Reeve, Proc. Zool. Soc. 1842; Conch. 

 Syst. pi. 139. f. 1. 



Hab. ? Mus. Cuming. 



5. Scutus tumidus, Quoy et Gaimard. 



Parmophorus tumidus, Quoy et Gaim. Voy. de I'Astrol. pi. 69. f. 6. 

 — Parm. gibbosus, Anton. — %Parm. breviculus, Blainv. Biill. des Sci. 

 1817 ; Sowerby's Gen. (Emarg.) fig. 2. 



Hab. Madagascar. Mus. Cuming. 



6. Scutus imbricatus, Quoy et Gaimard. 



Parmophorus imbricatus, Quoy et Gaim. Voy. de I'Astrol. pi. 69. 

 f. 17, 18. 



Hab. Island of Burias. Mus. Cuming. 



7. Scutus angustatus, A. Adams. S. testa elongata, subqua- 

 drangulari, lateribus angustatis, coarctatis ; dorso piano, con- 

 centrice striato, vertice subcentrali, postice declinato ; extremi- 

 tate untied sinuatd, posticd excurvatd, subelevatd. 



Hab. Eastern Seas. Mus. Ciuning. 



