ANATOMY OF ACHATINHXE. XI 



According to a drawing of P. solimana made from life by 

 Dr. R. Buchholz, and reproduced by v. Martens, the upper 

 tentacles are long, contracted near the eyes; the fore part of 

 the foot, from shell to head, is double the length of the short 

 hind part, which is vertically truncate at the end. Perhaps 

 the posterior truncation may be due to voluntary amputation. 



PERIDERIOPSIS (vol. xvi, p. 241) is unknown anatomically. 



LIMICOLARIA (vol. xvi, p. 247). Semper has dissected L. 

 turbinata Rve., and I have examined L. vanattai Pils. In 

 the latter species the lung (pi. 65, fig. 41) is richly vascular, 

 the pulmonary vein predominating as usual in Achatinida, 

 without large branches. The kidney is fully double the length 

 of the pericardium. Ureter enclosed. The genital system 

 (pi. 65, fig. 42) resembles that of Achatina. The penis is 

 thick and short, with terminal vas deferens and retractor. 

 The sheath is thin, and envelops the whole penis and the base 

 of the v. d. and retractor. The vagina is long. The retractor 

 muscle of the penis is inserted on the lung floor or diaphragm. 



Semper reports the ring muscle or sheath of the penis as 

 very short in L. turbinata, which otherwise seems like L. van- 

 attai. The jaw of L. vanattai has rather wide flat plaits, 

 narrowly overlapping. 



The radula (p. ix, fig. 5) of L. vanattai has 53,1,53 teeth. 

 Centrals narrow, with a minute cusp. Laterals large, bicus- 

 pid, no entocone being developed. The marginal teeth are 

 also bicuspid. Semper found the same type of teeth in L. 

 turbinata. 



The soft anatomy of Limicolaria is chiefly notable for the 

 normal insertion of the retractor muscle of the penis. 



BURTOA (vol. xvi, p. 298). Soft anatomy is unknown. 



ACHATINA (vol. xvii, p. 1). The anatomy of A. fulica has 

 been examined by Semper, of A. panthera by Wiegmann and 

 others; I have dissected A. chrysoleuca and A. leucostyla. 



Externally the visible soft parts- of Achatina do not differ 

 from those of ordinary Helicidce. The foot in A. leucostyla 

 is coarsely reticulated by narrow impressed lines, the large 

 areolse being subdivided into a fine net- work. In front of the 

 mantle the surface is coarsely rugose, longitudinal furrows 



