286 MR. A. GARRETT ON THE TERRESTRIAL [.Mar. 1, 



The Viti shells, which are a little smaller than Sandwich-Island 

 specimens, do not differ from the latter except in having in some 

 examples one or two more denticles or plicae on the parietal wall, and 

 the base more distinctly impressedly striated. It may be recognized 

 by its ovate shaj)e, smooth shining surface, dark chestnut or olive- 

 brown colour, short, convexly conoid spire, and mucronated apex. On 

 the lower portion of the parietal region may be observed two approxi- 

 mating folds, the lower one the smaller and occasionally wanting. 

 There are usually one or two small denticles above, and the palate 

 has five to seven laminae. The columclla-fold is continuous with 

 the basal portion of the peristome. 



M. fjranum, Gassies, is either the same as M. purvulus or very 

 closely related. 



4. Melampus tongaensis, Mousson. 



Melainpus tongaensis, Mousson, Journ. de Conch. 18/1, p. 22, 

 pi. 3. fig. 8; Schmeltz, Cat. Mus. Godeff. v. p. 88; Pfeiffer, Mou. 

 Pneum. (Auiic.) iv. p. 316. 



A number of examples were taken in the same station as the pre- 

 ceding species. Dr. Graffe found the type specimens at Tongatabu, 

 one ot the Tonga Islands. Prof. Mousson has described a variety 

 j}a//i(/ula (/. c.) from Vavao in the same group. 



It is very closely allied to, and perhaps only a form of, M. parvulus. 

 It is about the same size and colour, but is a little more oblong in 

 shape and the si)ire more produced. The dentation and plicae are 

 the same in the two species. 



5. IMelampus semisulcatus, Mousson. 



Melampus semisulcatus, Mousson, Journ. de Conch. 1869, p. 347, 

 pi. 15. fig. 2; Paetel, Cat. Conch, p. 114; Schmeltz, Cat. Mus. 

 GodefF. v. p. 88 ; PfeiflFtr, Mou. Pneum. (Auric.) iv. p. 318 ; Pease, 

 Proc. Zool. Soc. 18/1, p. 477. 



Occurs on the n.argius of mangrove-swamps, where I gathered 

 thousands of specimens. I also obtained it in similar stations at 

 Upolu, one of the Samoa Islands. 



This species is of an oblong pear-shape and a uniform cinnamon 

 colour; it has a short, usually eroded, spire, and is spirally grooved, 

 the grooves being more or less evanescent on the middle of the body- 

 whorl. There are three folds in the parietal region and usually two 

 lamina in the palate. Length 11 niillim. 



6. Melampus sculptus, Pfeiffer. 



Melampus seulptus, Pfeiffer, Proc. Zool. See. 1859, p. 29; Men. 

 Pneum. (Auric.) iv, p. 316. 



Melampus fricki, Pfeiffer, Proc. Zool. Soc. 1859, p. 29; Mon. 

 Pneum. (Auric.) iv. p. 304 ; Pease, Proc. Zool. Soc. 1871, p. A77. 



Melampus semiplicafus. Pease, Proc. Zool. Soc. 1860, p. Hfi, 

 1869, p. 60 (animal), 18/1, p. 477; Pfeiffer, Mon. Pneum. 

 (Auric.) iv. p. 304; Schmeltz, Cat. Mus. Godeff. v. p. 88; Layard, 

 Cat. Land and Freshw. Moll. N. Caled. p. 4. 



