_Fam._ Alatæ. 402. Rostellaria curvirostrum. 403. ---- columbaria. Hippochrenes, Montf. (from Sow. Gen.) 404. ---- Pes-pelicani. Aporrhais, Petiver. 405. Pteroceras aurantiacum. 406. Strombus pugilis. _Fam._ Purpurifera. 407. Cassidaria echinophora. Morio, Montf. 408. Side view of the outer lip, to shew the canal. 409. Oniscia Oniscus. Cassidara. 410. Cassis tuberosa, reduced. 411. ---- erinaceus. Cassidea, Sw. 412. ---- testiculus. Cypræcassis, Stutchbury. 413. Ricinula horrida. Sistrum, Montf. 414. Purpura persica. 415. Tritonidea (_Pollia_, Gray.) articularis. 416. Phos senticosa. 417. Monoceros crassilabrum. 418. Concholepas Peruviana. 419. Harpa ventricosa. 420. Dolium maculatum. 421. Buccinum undatum; _a_, anterior of the aperture; _p_, posterior. 422. ---- papillosum. Alectrion, Montf. 423. Nassa arcularia. 424. ---- neritoidea. Cyclops, Montf. 425. Cyllene, Gray. 426. Eburna Zeylanica. 427. Bullia vittata. 428. Terebra maculata. Subula, Bl. 429. Trichotropis bicarinata. _Fam._ Columellata. 430. Columbella mercatoria. 431. Mitra plicaria; _c_, termination of the columella. 432. Conohelix marmorata. 433. Voluta Vespertilio. Cymbiola, Sw. 434. Cymba porcina. 435. Melo Æthiopicus. 436. Volutilithes spinosus. 437. Marginella Glabella. Glabella, Sw. Cucumis, Klein. 438. ---- persicula. Volutella, Sw. Persicula, Schum. 439. Volvaria concinna. _Fam._ Convolutæ. 440. Ovulum Ovum. 441. ---- verrucosum. Calpurnus, Montf. 442. ---- Volva. Radius, Montf. 443. ---- gibbosum. Ultimus, Montf. 444. Cypræovulum capense. 445. Cypræa arabica, back. 446. The same, front. 447. Cypræa Algoensis. Luponia, Gray, front. 449. ---- Pediculus. Trivia, Gray, back. 450. The same, front. 451. Terebellum convolutum. Seraphs, Montf. 452. ---- subulatum, front. 454. Erato Mangeriæ. 455. Ancillaria glabrata. Anolax, Brongn. 456. ---- cinnamonea. 457. Oliva Maura. 458. ---- subulata. Hiatula, Sw. 459. Conus nocturnus. Rhombus, Montf. 460. ---- Nussatella. Hermes, Montf. 461. ---- Textile. Cylinder, Montf. 462. ---- geographus. Rollus, Montf. _Order._ CEPHALOPODA. _First Division._ Polythalamous Cephalopoda. _Fam._ Orthocerata. 463. Amplexus coralloides. (from Sow. Min. Con.) 464. Orthoceratites annulatus. 465. Nodosaria æqualis. 466. Belemnites, with the outer coat broken to shew the alveole. 467. ---- portion of the alveole separated. 468. ---- hastatus. Hibolithes, Montf. (from Blainville.) 469. Conularia quadrisulcata. 470. Conilites pyramidatus, (from Blainville.) _Fam._ Lituacea. 471. Spirula Peronii. _Fam._ Nautilacea.