391. Spiraxis nigricans, Pj. 



392. Spiraxis oblonga, Pf. 



393. Spiraxis parvula, Pf. 



394. Spiraxis Shuttle worthi, 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, iy. 

 4U. Cylindrella cretacea, Pf 



412. Cylindrella decollata, Nyst. 



413. Cylindrella denticulata, Pf 



414. Cylindrella filicosta, Shuttl. 



415. Cylindrella Ghiesbreghti, P/". 



416. Cylindrella goniostoma, Pf 



417. Cylindrella grandis, Pf 



418. Cylindrella Liebmanni, Pf. 



419. Cylindrella mexicana, Pf 



420. Cylindrella Pfeifferi, i/ewl-e. 



421. Cylindrella Pilocerei, Pf 



422. Cylindrella polygyra, Pf 



423. Cylindrella splendida, Pf 



424. Cylindrella teres, Menke. 



425. Cylindrella turris, P/". 



Auriculidae. 



426. Melampus coffea, Linn. 



Truncatellidae. 



427. Truncatella caribeeensis, Sowb 



428. 

 429. 

 430. 

 431. 

 432. 

 433. 

 434. 



435. 



436. 



437. 



438. 



439. 



440. 



441. 



442. 



443. 



444. 



445. 



446. 



447. 



448. 



449. 



450. 



451. 



452. 



453. 



454. 



455, 



456, 



457. 



458 



459 



460 



461, 

 462 



Cycloplioridae. 



Cyclotus Dysoni, Pf 

 Cyclophorus Boucardi, Sall^. 

 Cyclophorus mexicanus, M. 

 Tudora planospira, Pf 

 Cistula trochlearis, Pf 

 Chondropoma cordovanum, P. 

 Chondropoma truncatum, W. 



Helicinidae. 

 Helicina brevilabris, Pf 

 Helicina chiapensis, Pf 

 Helicina chrysocheila, Binn. 

 Helicina chrysocheila, Shuttl. 

 Helicina cinctella, Shuttl. 

 Helicina concentrica, Pf 

 Helicina cordillerae, Sall^. 

 Helicina delicatula, Shuttl. 

 Helicina elata, Shuttl. 

 Helicina flavida, Menke. 

 Helicina Ghiesbreghti, Pf 

 Helicina Heloisae, SalU. 

 . Helicina Lindeni, Pf 



Helicina lirata, Pf 

 . Helicina merdigera, Sall^. 

 . Helicina notata, Salle. 

 , Helicina Oweniana, Pf 

 Helicina Sandozi, Shuttl. 

 Helicina sinuosa, Pf 

 Helicina tenuis, Pf 

 Helicina tropica, Pf 

 Helicina turbinata, Wiegm. 

 Helicina zephyrina. Duel. 

 Schasicheila alata, Mke. 

 Schasicheila Nicoleti, Shuttl 

 Schasicheila parmucea, Mor. 



Proserpinidae. 

 Ceres eolina. Duel. 

 Ceres Salleana, Gray. 



(e) 



