60 ANATOMY OP ACHATINELLIO-E. 



but failed to recognize the nature of the retractor muscle of 

 the appendix. 



Mr. H. M. Gwatkin, in Proc. A. N. S. Phila., 1895, p. 238, 

 gives the results of his examinations of the teeth of 20 species 

 of Achatinella and Partulina, six of Amastra, and one each of 

 Leptachatina and Laminella. In the same volume, p. 239, Mr. 

 H. Suter describes the teeth of A. cookei, lyonsiana, and Part. 

 dolei, and the teeth and jaws of two Amastrcu, figuring those 

 of Ach. dolei and Amastra nibicunda. 



In Proc. A. N. S. Phila., for 1900, p. 565, the senior writer 

 described and figured the soft anatomy of A. dolei, pointing 

 out the significance of the Achatinellid organization. 



The figures represent the following species: 



PLATE 12, figs. 1, 2, Achatinella abbreviata. Northwestern 

 Palolo. A. gl., albumen gland; fl., appendix; r. p., retractor 

 muscle of the penis. 



Fig. 3, Achatinella stewartii. Northwestern Palolo. Male 

 organs and atrium only. 



Fig. 4, Achatinella viridans. Nuuanu. Male organs. 



Fig. 5, Achatinella byronii. Waimano-Manana ridge. 



Fig. 6, Achatinella lila. Waimano-Manana ridge. 



PLATE 13, fig. 1, Achatinella simulans Rve. Waolani. Sp., 

 spermathecal duct; v. d., vas deferens. The specimen is not 

 gravid, uterus therefore small. 



Fig. 2, Achatinella lorata nobilis Bve. 



Fig. 3, Achatinella mustclina. Popouwela. App., appen- 

 dix ; other letters as above. 



Fig. 4, Achatinella vulpina. Glen Ada. Male organs. 



PLATE 14, fig. 1. Embryo of Pauahia tantilla. Line on left 

 1 mm. long. 



Fig. 2, Partulina rcdfieldi kamalocnsis. Lettering as above. 



Fig. 3, Achatinella lorata. Jaw. 



Fig. 4, Newcombia philippiana. ut., uterus, containing one 

 embryo. 



Fig. 5, Partulina confusa. The minute, slender albumen 

 gland is seen above the proximal end of the hermaphrodite 

 duct. 



