391. Spiraxis nigricans, Pj. 



392. Spiraxis oblonga, Pf. 



393. Spiraxis parvula, Pf. 



394. Spiraxis Shuttleworthi, Pf. 



395. Spiraxis streptostyla, Pf. 



396. Spiraxis turgidula, Pf. 



397. Orthalicus Boucardi, Pf. 



398. Orthalicus livens, Pf. 



399. Orthalicus longus, Pf. 



400. Orthalicus undatus, Brug. 



401. Achatina ambigua, Pf. 



402. Achatina chiapensis, Pf. 



403. Achatina Rangiana, Pf. 



404. Achatina trochlea, Pf. 



405. Achatina trypanodes, Pf. 



406. Cylindrella apiostoma, Pf. 



407. Cylindrella arctospira, Pf. 



408. Cylindrella attenuata, Pf. 



409. Cylindrella Boucardi, Pf. 



410. Cylindrella clava, Pf. 



411. Cylindrella cretacea, Pf. 



412. Cylindrella decollata, Nyst. 



413. Cylindrella denticulata, Pf. 



414. Cylindrella filicosta, Shuttl. 



415. Cylindrella Ghiesbreghti, /y. 



416. Cylindrella goniostoma, Pf. 



417. Cylindrella grandis, Pf. 



418. Cylindrella Liebmanni, Pf. 



419. Cylindrella mexicana, Pf. 



420. Cylindrella Ffeifferi, jtfenfce. 



421. Cylindrella Pilocerei, Pf. 



422. Cylindrella polygyra, Pf. 



423. Cylindrella splendida, Pf. 



424. Cylindrella teres, Menke. 



425. Cylindrella turris, Pf. 



Auriciilidae. 



426. Melampus coffea, Linn. 



Trimcatellidae. 



427. Truncatella caribseensis, Sowb. 



Cycloplioridae. 



428. Cyclotus Dysoni, Pf. 



429. Cyclophorus Boucardi, Sallt. 



430. Cyclophorus mexicanus, M. 



431. Tudora planospira, Pf. 



432. Cistula trochlearis, Pf. 



433. Chondropoma cordovanum, P. 



434. Chondropoma truncatum, W. 



Helicinidae. 



435. Helicina brevilabris, Pf. 



436. Helicina chiapensis, Pf. 



437. Helicina chrysocheila, Binn. 



438. Helicina chrysocheila, Shuttl. 



439. Helicina cinctella, Shuttl. 



440. Helicina concentrica, Pf. 



441. Helicina cordillerae, Salle. 



442. Helicina delicatula, Shuttl. 



443. Helicina elata, Shuttl. 



444. Helicina flavida, Alenke. 



445. Helicina Ghiesbreghti, Pf. 



446. Helicina Heloisse, SalU. 



447. Helicina Lindeni, Pf. 



448. Helicina lirata, Pf. 



449. Helicina merdigera, SalU. 



450. Helicina notata, Salle. 



451. Helicina Oweniana, Pf. 



452. Helicina Sandozi, Shuttl. 



453. Helicina sinuosa, Pf. 



454. Helicina tenuis, Pf. 



455. Helicina tropica, Pf. 



456. Helicina turbinata, Wiegm. 



457. Helicina zephyrina, Dud. 



458. Schasicheila alata, Mre. 



459. Schasicheila Nicoleti, Shuttl 



460. Schasicheila pannucea, Mor. 



Proserpinidse. 



461. Ceres eolina, Dud. 



462. Ceres Salleana, Gray. 



