) 
Lieut.-Col. Godwin-Austen on Durgella Christiane. 377 
PLATE XV. 
Fig. 1. Philyra cristata, sp. n., x 4 diam. 
Fig. 1 a. Outer maxillipede of the same, considerably magnified. 
Fig. 1b. Postabdomen of a male, considerably magnified. 
fg. 2. Chela of Philyra levidorsalis, sp. n., magnified. 
fig. 8. Iha spinosa, sp.n., X 2 diam. 
Fug. 4. Dorippe armata, White (ined.), nat. size. 
Fiy. 4a. Outer view of larger chela of the same, nat. size. (The figures 
are taken from White’s typical specimen in the Museum col- 
lection.) 
PiLatTe XVI. 
Fig. 1. Outer view of chela of Dromia fulvo-hispida, sp. n., * about 
A diam. 
Fig. 2. Dorsal view of frontal rezion of Dromia spinirostris, showing the 
form of the rostral spines, X 14 diam. 
Fig. 3. Pagurus granulimanus, sp. n., nat. size. 
Fig. 3a. Outer view of larger (left) chela of the same, nat. size. 
Fig. 4. Outer view of third (right) leg of Isocheles? gracilis, sp. n., X 
13 diam., showing the form of the long and slender dactylus. 
Fig. 5. Spiropagurus elegans, sp. n., X 13 diam. 
Fig. 5a. The spirally-coiled genital appendage of the left leg of the 
fifth pair, x 5 diam. 
Fig. 6. Rostrum and orbital region of Alpheus paracrinitus, sp. n., X 
8 diam. 
Fig. 7. Large raptorial limb (second maxillipede) of Lysiosquilla acan- 
thocarpus, var. -septemspinosa, sp. n.. X 2 diam. 
XXX VIII.—Descriptionof the Animal of Durgella Christiane, 
a Species of Land-Shell from the Andaman Islands. _ By 
Lieut.-Colonel H. H. Gopwin-Austen, F.R.S., F.Z.8., 
&e. 
My friend Mr. Geoffrey Nevill, a short time since, was 
good enough to send me some specimens of Andaman and 
Nicobar land-shells in spirit, and among them a specimen 
named Helicarion Christiane, Vheobald. This I took an 
early opportunity of examining ; and it proved a most inter- 
esting species. The form of the shell-lobes at once recalled 
the genus Durgella, W. Blf., described in full in Journal 
Linn. Soe. vol. xv. 1881, p. 291; and after dissecting out the 
generative organs and odontophore, there was no doubt of 
its relationship to D. levicula, Bs., of Venasserim, and D. 
assamica of the Brahmaputra valley, Assam, thus extend- 
ing in an interesting way the range of this very well-marked 
genus. I give below a full description of the animal of this 
the largest species of it; and I only wish that I could give 
