464 THE VOYAGE OF H.M.S. CHALLENGER. 



4. Xenophora pallidula (Reeve), (PI. XXVIII. fig. 6). 



Phorus pallidulus, Reeve, Proc. Zool. Soc. Lond., 1842, p. 162. 

 ,, „ Reeve, Conch. Syst., voL ii. pi. ccxiv. fig. 4. 



,, „ Reeve, Conch. Icon., vol. i. pL i. fig. 4. 



Xenophora pallidida, Philippi, Conch. Cab. (ed. Kiister, Trochus), p. 347, sp. 8, pi. xlviii. fig. 2. 

 „ „ Lischke, Japan. Meet. Conch., vol. ii. p. 169, vol. iii. p. 56, pi. iii. figs. 1-3. 



„ „ Fischer, Kiener's Iconog. {Trochus), p, 444, sp. 13, pi. liv. 



„ „ Dunker, Ind. Moll. Mar. Japon., p. 123. 



Station 204 a and b. November 2, 1874. Lat. 12° 43' S., long. 122° 9' E. 

 Philippines. 100 to 115 fathoms. Green mud. 



Habitat. — Japan (Lischke). 



This species beyond all others buries itself in the mass of materials which it piles on its shell ; 

 the Challenger specimen (see figure) surpasses anything I have seen, not so much in the mere mass 

 as in the selection and arrangement of its foreign burden of shells. These, besides some small Ledas 

 and Limopsides with fragments of Turbo (Calcar), &c, on the spire, are chiefly long Mitras and Pleuro- 

 tomas (Plcurotoma spcciosa, Reeve, Plcurotoma desliaysii, Doumets, Plcurotoma climacota, Wats., 

 Pkurotoma, sp.), a Ccrithium, and Terebras (Terebra, sp., and Tercbra mamillata, Wats.), which project 

 from the periphery like the spokes of a wheel. Messrs H. and A. Adams (Genera, vol. i. p. 363) 

 remark that " the adventitious pieces of shell are so disposed as not to curve downwards beyond the 

 edge of the shell so as to impede the progress of the animal, but are usually placed with their concave 

 sides uppermost." The fact that these " adventitious " burdens are soldered into the shell by the 

 inhabitant itself will account for their not being stumbling-blocks, but in this specimen they certainly 

 project much below the plane of the base. 



The embryonic apex of this species is white, with brown epidermis, small, rounded, and formed 

 of four whorls. 



5. Xenophora solarioides (Reeve). 



Phorus solario'ides, Reeve, Conch. Icon., vol. i. pL iii. fig. 8. 



„ „ Adams and Reeve, " Samarang" Moll., p. 50, sp. 1, pi. xvii. fig. 6. 



Xenophora solarioides, Philippi, Conch. Cab. (ed. Kiister, Trochus), p. 346, sp. 6, pi. xlvii. fig. 6. 

 „ „ Fischer in Kiener's Iconog. (Trochus), p. 447, sp. 15, pi. xliv. fig. 3. 



„ „ Brazier, "Chevert" Exped. Shells, Proc. Linn. Soc. New South Wales, 1878, 



vol. ii. p. 3, No. 19. 



September 8, 1874. Torres Strait. Off Albany Island, Cape York. 3 to 12 fathoms. 



Station 208. January 17, 1875. Lat. 11° 37' N., long. 123° 31' E. Philippines. 18 

 fathoms. Blue mud. 



Station 212. January 30, 1875. Lat. 6° 54' N., long. 122° 18' E. Off Malanipa, 

 Basilan Strait, Philippines. 10 to 20 fathoms. Sand. 



Habitat. — Philippines and Andamans (British Museum). 



In this species the embryonic apex is small and prominent, composed of nearly three smallish, 

 transparent white whorls. The specimen from Station 212 is beset with Venus marica, Linne, 

 some Ostreas, a Trochus, and a species of Terebra, which I believe to be new. 



