AMPHIDROMUS, GROUP VII. 181 



Bulimus glaucolaryux DOHRN, P. L. S., 1861, p. 207, pJ. 26, f. 7. 

 PFR., Monogr. vi, p. 31 MORELET, Ser. Conchy], iv, p. 264. 

 Amphidromus glaucolarynx ROCHEBRUNE, Bull. Soc. Philomath, 

 vi, p. 71. A. glauco larynx Dohrn, FULTON, t. c., p. 90 Bulimus 

 schomburgki var. fasciatus MARTENS, Ostas. Zool., p. 80, pi. 21, f. 

 la, \b (1867). A. glaucolarynx var. fasciata Mart., FULTON, t. c., 

 p. 90, pi. 7, f. 3. 



The dark interior and lip are doubtless constant characters. Ful- 

 ton mentions a specimen in the British Museum 48 mill. long. A 

 young shell before me (fig. 45) has the last whorl olive-brown, with 

 a bright blue-green sutural border edged below with white, and a 

 buff umbilical patch. The spire changes to a pink tone, the earlier 

 whorls deep pink, paler below the sutures, the apex purplish. There 

 are some darker streaks on the spire, and some early whorls have an 

 interrupted brownish line below the suture. 



Form fasciatus (Martens). PI. 60, figs. 46, 47, 48. Greenish- 

 yellow with broad brown streaks ; a white or light-green band at the 

 suture, and usually a second along the periphery of the last whorl. 

 Peristome between rose red and violet ; whorls but little convex 

 (Mart.). 



Length 37, diam. 20, alt. of aperture 18 mill. 



Length 34, diam. 20, alt. of aperture 16 mill. 



Siam: Petshaburi (Martens) 



Scarcely distinguishable from the typical form except in the shorter 

 contour and smaller size. The localities given " Pexaburi " and 

 " Petshaburi " are merely variations of spelling for a place near the 

 head of the Gulf of Siam, on the west side, sometimes spelled 

 Phayt-che-booree. 



Var. PERRIERI Rochebrune. 



Dr. Jousseaume compared a specimen of fasciatus with the type 

 of A. perrieri, for Mr. Fulton, and stated that he could not separate 

 them. The description of perrieri follows: Shell sinistral, elongate- 

 conic, very solid, delicately striatulate, painted with spaced, wide, 

 square spots arranged in two spiral series. Spire elongate, the 

 vertex rather acute, reddish. Whorls 7, convex ; suture deep, blue- 

 zoned. Last whorl elongate, half the length of the shell, the base 

 with two wide violet-blue bands. Aperture narrow, long, somewhat 

 narrowed anteriorly ; peristome white, inflexed, somewhat calloused; 



