80 PROCEEDINGS OF SOCIETIES. 



f452 Mangelia (Bela) septangularis, Montagu, v. 3. p. 458. 



453 Mangelia nana, Loven. v. 3. p. 461. 

 f454 Mangelia teres, Forbes, v. 3. p. 462. 



455 Mangelia purpurea, Montagu, v. 3. p. 465. 

 f456 Mangelia Leufroyi, Michaud. v. 3. p. 468. 

 J457 Mangelia linearis, Montagu, v. 3. p. 470. 

 |458 Mangelia gracilis, Montagu, v. 3. p. 473. 

 f459 Mangelia nebula, Montagu, v. 3. p. 476. 

 f460 Mangelia brachystoma, Philippi. v. 3. p. 480. 

 J461 Mangelia striolata, Scacchi. v. 3. p. 483. 

 J462 Mangelia costata, Pennant. (?) v. 3. p. 485. 

 J463 Mangelia attenuata, Montagu, v. 3. p. 488. 



XXI. CYPR^EAD^E. 



f464 Cypraca Europsea, Montagu, v. 3. p. 495. 

 f465 Ovula patula, Pennant, v. 3. p. 498. 

 f466 Ovula (?) acuminata, Bruguiere. v. 3. p. 500. 

 467 Marginella kevis, Donovan, v. 3. p. 502. 



GASTEROPODA OPISTHOBRANCHIATA. 

 I. BULLID^E. 



f468 Cylichna cylindracea, Pennant, v. 3. p. 508. 

 469 Cylichna truncata (Adams ?) Montagu, v. 3. p. 510. 

 f470 Cylichna obtusa, Montagu, v. 3. p. 512. 

 f47l Cylichna mammillata, Philippi. v. 3. p. 514. 



472 Cylichna nitidula, Loven. v. 3. p. 515. 



473 Cylichna conulus, Deshayes. v. 3. p. 517. 



474 Cylichna strigella, Loven. v. 3. p. 518. 

 f475 Cylichna umbilicata, Montagu, v. 3. p. 519. 

 f476 Amphisphyra hyalina, Turton. v. 3. p. 521. 

 J477 Tornatella fasciata, Linneus. v. 3. p. 523. 

 j-478 Akera bullata, Mailer, v. 3. p. 527. 



|479 Bulla hydatis, Linneus. v. 3. p. 530. 

 f480 Bulla Cranchii, Leach, v. 3. p. 533. 

 f481 Scaphander lignarius, Linneus. v. 3. p. 536. 

 f482 Philine aperta, Linneus. v. 3. p. 539. 



483 Philine quadrata, Searles Wood. v. 3. p. 541. 

 |484 Philine scabra, O. Muller. v. 3. p. 543. 

 f485 Philine catena, Montagu, v. 3. p. 545. 

 f486^ > hiline punctata, Clark, v. 3. p. 547. 

 |487 Philine pruinosa, Clark, v. 3. p. 549. 



II. APLYSIADJE. 



f488 Aplysia hybrida. v. 3. p. 554. 



III. PLEUROBRANCHID^E. 



f489 Pleurobranchus membranaceus, Montagu, v. 3. p. 558. 

 |490 Pleurobranchus plumula, Montagu, v. 3. p. 559. 



IV. PHYLLIDIDJS. 

 491 Diphyllida lineata, Otto. 



