70 Zoological Society. 



The posterior tooth of the inner lip is elongated, the middle tooth 

 double ; in the outer lip three of the teeth are prominent, the two 

 posterior being approximated ; the umbilicus is partly closed by the 

 reflection of the inner lip. 



Scarabus imperforatus, A. Adams. S. testa ovatd, compressd, 

 imperforatd ; spird brevi, acuminata, lateribus concavis, Icevius- 

 culd, longitudinaliter tenuissime substriatd, lutescenti fusco- 

 castaneo variegatd, anfractu ultimo postice subanyulato ; aper- 

 turd oblonyd ; labio antice excavato, reflexo, labro semicirculari. 

 Hab. Borneo. (Mus. Cuming.) 



The last whorl is posteriorly gibbous ; the umbilicus is closed by 

 the inner lip ; three of the teeth in the outer lip are prominent, the 

 two posterior approximated. 



Scarabus panthertnus, A. Adams. S. testa ovato-pyramidali, 

 tenui, Iceviusculd, longitudinaliter substriatd, lutescenti, macu- 

 lis rufo-fuscis ornatd ; spird acuminata, lateribus convexis ; 

 aperturd oblongd, labio antice rotundato, rejlexo, labro semicir- 

 culari. 

 Hab. Siquejor ; Philippines, woods, under stones. (Mus. Cuming.) 

 The aperture is yellowish white ; three of the teeth in the outer lip 

 are more prominent than the others, the intermediate ones being 

 sometimes double ; the umbilicus is large and deep. 



Scarabus borneensis, A. Adams. S. testa ovato-pyramidali, 

 luteo-fuscd, castaneo confuse fasciatd, Iceviusculd ; epidermide 

 tenuissime, lonyitudinaliter striatd ; aperturd oblonyd, anyustd, 

 spiram subcequante, anfractu ultimo inferne subanyulato ; fovea 

 umbilicali anyustd, transversd. 

 Hab. Borneo ; Lieut. Taylor. (Mus. Cuming.) 

 This species is narrower and more ovate than S. plica tus, of a 

 much smaller size ; the outer lip is rectilinear in the middle ; the 

 teeth of the outer lip are connected by an elevated ridge, and three 

 of the teeth are more prominent than the others. 



Scarabus chalcostomus, A. Adams. S. testa ovato-pyrami- 

 dali, spird elevatd, acuta, longitudinaliter substriatd, pallide 

 luted, rufo-fuscd variegatd ; aperturd ovali, tened ; labio antice 

 subrecto ; labro semicirculari ; umbilico patulo. 

 Hab. Solomon's Islands; Capt. D'Orville. (Mus. Cuming.) 

 In general appearance this species resembles 8. pyramidatus, but 

 it is more oval, larger, lighter, with the middle tooth on the inner 

 lip double, and the lower tooth broad and ascending; two of the 

 teeth in the outer lip are very large and tubercular. 



A Monograph of Phos, a genus of gasteropodous 

 Mollusca. By x^rthur Adams, F.L.S., R.N. 



Phos, Montfort. 



Shell ovately fusiform, spire acuminated, whorls longitudinally 

 ribbed and cancellated ; columella with a single anterior plait ; outer 

 lip notched in front, striated within. The animal has a small head ; 



