Dr. H. Woodward — Recent and Fossil Tleurotomarioe. 435 



conservation.^ Indeed it seems very probable that it may have been, 

 like the species first discovered (P. Quoyana), inhabited by a hermit- 

 crab, at the time it was obtained. 



In Mr. Damon's specimen the coloration is much more brilliant 

 than is represented in von Martens' figure of Dr. Hilgendorf's speci- 

 men, and its altogether fresh and uninjured appearance suggests it to 

 be the shell of a strong and healthy animal just caught alive. A 

 small portion of the outer lip, on the lower side of the slit, has been 

 broken away in removing the animal ; otherwise the shell is quite 

 perfect. The measurements recorded show Dr. Hilgendorf's speci- 

 men to be 8 mm. larger in diameter; its height is also 12 mm. 

 greater than that of Mr. Damon's specimen. 



JPleurotomaria Beyrichii, Hilgendorf. (PI. XI. Fig. 1, a, h.) 



Tleurotomaria Beyrichii, Hilgendorf, 1877, Sitzungsber. Gesells. nalurforsch. 

 Freund. Berlin, p. 72. 



Schepraan, 1879, Tydschr. d. Ned. Dierk. Vereen, vol. iv. 



p. 166. 



Crosse, 1880, Journ. Concliyl. vol. xxviii. p. 204. 



Martens, 1880, Conch. Mittheil. vol. i. heft 3, p. 33, 



taf. vii. 



Dall, 1881, Bull. Mus. Comp. Zool. Harvard Coll. vol. ix. 



p. 78. 



H. Crosse, 1882, Journ. Conchyl. vol. xxs. p. 16. 



Animal and operculum of P. Beyrichii unknown. 



Shell trochifortn, solid, whorls nine, surface ornamented with 

 numerous broadly spiral ridges, intersected by somewhat strongly- 

 marked lines of growth, which follow the same wave-like, or'V^-shaped, 

 curve, as the mouth of the shell. Aperture subquadrate, with a deep 

 slit (about one inch) in its outer margin. The part of the slit which 

 has been progressively filled up forms a distinct band round the 

 whorls. There are 9 spiral ridges above the slit, and 6 below, in 

 the body-whorl; but these lower ridges are overlapped in the upper 

 whorls as far as the line once occupied by the slit, which forms a 

 band around the whorls of the shell just above the suture. The 

 lower margin of the whorls is bent at a rather sharp angle, the some- 

 what flattened base of the shell having 19 spiral ridges on it. The 

 lip near the columellar margin is much thickened and flexuous, the 

 interior of the shell and the umbilicus being nacreous. Colour pale- 

 yellow, streaked with bright orange red. 



Largest diameter of base of shell 75 millimetres ; smallest diameter 

 of base 65 mm. ; total height 70 mm. ; diameter of aperture 85 mm. ; 

 height of aperture 25 mm. ; length of slit 22 mm. 



Habitat : — Found living ofi" the coast of Japan, at Enoshima, depth 

 unknown. 



1 Dr. C. Gottsche writes (Berlin, 22 July, 1885), " In Dr. Hilgendorf's specimen, 

 which is a little rolled, and covered with Serpulse and Bryozoa, the aperture is 

 entirely broken away, so that the slit can only be reconstructed from the band." He 

 adds that two more specimens of F. Beyrichii were brought back by Dr. Doederlein, 

 of Strassburg in 1882, but they do not exhibit the slit itself. This statement brings 

 the total number of living specimens of Pleurotomaria of all species known, up to 

 13 individuals. 



