^94 LIEUT.-COL. H. H. GODWIN-AUSTEN ON [Apr. 20, 



tory organ (dart-sac) is a long cylindrical body, becoming "finer 

 towards tbe posterior end ; its retractor muscle has its attachment 

 with that of the penis, close below the apex of the shell, in the body- 

 cavity. 



The spermatheca is of the same size as the latter, and in this 

 specimen presents a swollen sac below, terminating in a short, thin, 

 cylindrical point, which is buried and attached where the convolu- 

 tions of the ovo-testis commence. 



The spermatophore is similar to iimt of Ausfenia gigas, but rather 

 shorter, the sac being 0-3 inch long. The cervicorn processes at 

 the base are strong and numerous, much branched above (see 

 Plate XXVII. fig. 8). The basal duct is 02 in length. Three of 

 these were found in the spermatheca examined. 



List of species q/"Girasia. 



1. hool-eri, Gray (Plate XXVII. 



figs. 2, 3)," = G. theohaldi, 

 G.-A., Khasi. 



2. crocea, G.-A., Khasi. 



3. shiUongends, G.-A., Khasi. 



4. , var. 5r2<wweff, G.-A. (Plate 



XXVII. fig. 1), Khasi.: 



5. nagaensis, G.-A., Naga." 

 G. magnifica, Nev. & G-.A. 



(Plate XXIV. figs. 1, 2), 



Upper Burmah. 



7. rad/ia, G.-A.?, Assam. 



8. bnrtii, G.-A.?, Assam. 



9. j)egucnsis, Th.?, Pegu. 



AusTENiA GiGAs. (Plate XXIV. fig. 8, shell.) 



Vitrina (jigas, Benson, J. A. S. B. vol. v. (1836), p. 350. 



Helicarion gigas, Godwin-Austen, J. A. S. B., vol. xliv. (1875), 

 plate iii. (animal). 



Vitrina gigus, Theobald & Hanley, Conch. Ind. pi. Ixvi. figs. 2, 3. 



Helicarion (sec. B.) gigas, Theobald, Cat. L. & F.W. Shells of 

 B. India, p. 23, 1876. 



Helicarion gigas, var. minor, J. A. S. B. vol. xliv. 1875, pi. iii. 

 (animal). 



Austenia gigas, G. Nevill, Hand List Indian Museum, 1878, p. 16 

 (no description). 



Shell ovate, broad, whorls about 1 h ; apex depressed ; body-whorl 

 large and flatly expanded, with a shining lustre ; colour olivaceous, 

 with sienna-brown, pale at apex, somewhat nacreous within. One 

 specimen is all sienna-brown and milkv-wbite within (Plate XXIV. 

 fig. 9). _ ' 



Typical from Teria Glial, Khasi Hills. Largest example : major 

 diam. 1"7 inch, minor diam. ]/2 inch. Another: major diam. 1'53 

 (=38-5 m.), minor diam. 0-95 ( = 24-5 m.). 



\&Y.minor^. Naga Hills. Shell : major diam. '84 inch (21*5 m.), 

 minor diam. '55 inch. (18 m.). Of same form ns gigas, but with a 

 fine glassy lustre and olivaceous brown. Animal spotted. 



Small var. North Khasi. Shell: major diam. I'O inch (25"5 m.), 

 minor diam. 0C8. Animal brown. 



Pale grey (dissected) var. Burmah? from G. Nevill. Shell: 

 major diam. 0"95 inch (25*5 m.), minor diam. 0/5 (19'0m.). 

 1 May be Helicarion resjplendeiis, Nevill, J. A. S. B. 1877, p. 23. 



