396 



" THETIS " SCIENTIFIC RESULTS. 



on the inner side by a sheet of callus ragged at the edge. 

 Columella thickened, with a prominent fold, 

 behind which a furrow runs up under the 

 lip callus. Length, 11 '5 mm.; breadth, 

 4-5 mm. 



The narrowly perforate summit easily 

 distinguishes this from C. arachis, Q. & G., 

 the only Australian shell likely to be taken 

 for it. 



The Chinese C. involuta, A. Ad.,* appears 

 to resemble it more. , 



The "Thetis" pi'ocured this oif the Manning 

 River in 22 fathoms; and in 63-75 fathoms 

 off Port Kembla. I have taken it on the 

 beach in Middle Harbour. 



CYLICHNA PROTUMTDA, sp. nov. 



(Fig. 112.) 



Stations 13, 35, 37, 49, 57. 



Shell narrow, long in the waist, inflated 

 rather suddenly at the anterior third, rounded 

 anteriorly, obliquely truncated at the vertex. 

 Colour pale j'ellow. Sculptui-e : faint growth 

 lines are cut at right angles by fine, sharp, 

 incised, spiral lines, which are more or less 

 obliterated medially, but distinct posteri- 

 orly. Aperture the full length of the shell, 

 posteriorly enlarged, and leaning in towards 

 the axis, medially constricted to a slit, and 

 posteriorly opening in a pear-shaped expan- 

 sion. The body whorl is overlaid by a sheet 

 of callus. Columella slightly curved, broad 

 inner margin subdentate, outer reflexed. 

 Vertex pierced by a narrow, deep, axial 

 perforation. Length, 5-4 nun. ; breadth, 

 2'3 mm. 



This is the species recorded! from 

 Watson's Bay by Brazier as Cylichna pi/ra- 

 midata, A. Ad. J 



The " Thetis " took a few specimens off Cape Three Points in 

 41-50 fathoms; off Wata Mooli in 54-59 fathoms; off Botany Bay 



Fig. 111. 



Fis. 112. 



* A. Adams— Thes. Conch., ii., ISoO, p. ,")9ij, pi. cxxv., f. 149. 



t Brazier — Kee. Austr. Mus., i., 18!)0, p. So. 



:*: A. Adams— Thes. Conch., ii., 18-50, p. .59."), pi. cxxv., f. 149. 



