THE SESSILE BAI1NACLES. 



281 



According to Dr. W. H. Dall : 



This species is found sessile on the California gray whale, Rhachiti-nrctix 

 glaiicns Cope. I have observed them on specimens of that species hauled up 

 on the beach at Monterey for cutting off the blubber, in the bay whaling of that 

 locality. The superior surfaces of the lateral lamina?, being covered by the 

 black skin of the whale, are not visible ; and the animal removed from its native 

 element protruding its bright yellow hood in every direction, to a surprising 

 distance, as if gasping for breath presented a truly singular appearance. 



Genus TUBICINELLA Lamarck. 



1802. Tubicinella LAMAKCK, Annales du Museum Nationale, vol. 1, p. 461. 

 1854. Tubicinella Lamarck, DAEWIN, Monograph, p. 430. 



Shell tubular, wider at the top in adults, composed of six equal 

 compartments, belted by several or many rounded ridges, the parietes 

 longitudinally striated, the outer layer porose; radii narrow; sheath 

 nearly as long as the tube, marked with circular grooves ; lower layer 

 of the opercular membrane lining the shell nearly to the base ; oper- 

 cular valves four, rather large. 



Type. TubiGinella major Lamarck. 



Tulticinella may be described as an elongated Coronula without 

 radial ribs. It is also related to Xenolalanus by the very long 

 opercular membrane. It lives embedded nearly to the top in the skin 

 of the whale. With growth the shell and opercular valves wear oil 

 at the top, so that the length of an adult individual represents but a 

 small part of the shell formed during growth. 



TUBICIIfELLA MAJOR Lamarck. 



Plate 65, fig. 5. 



1802. Tulticinella (major), and Tubicinella (minor) LAMAKCK, Annales du 



Museum, vol. 1, p. 463, pi. 30, fig. 1. 

 1806. Lepas trachealis SHAW, Shaw and Nodder's Naturalist's Miscellany, 



vol. 17, pi. 726. 



1815. Lepas tracheceformis WOOD, General Conchology, p. 31, pi. 4, figs. 1-3. 

 1818. Tubicinella amilata RANZANI, Opuscoli Scientific!, vol. 2, p. 89. 

 1818. Tubicinella baleen a rum LAMAKCK, Anim. sans Vert., vol. 5, p. 385. 

 1821. Tulticinella balwnae OKEN, Naturgeschichte fur Schulen, p. 659. 

 1824. Tubicinella laniarckii LEACH, Encycl. Brit. Suppl., vol. 3, pi. 57 (not 



seen ) . 

 1824. Coronula tubicinella Lamarck, BLAINVII.LE, Diet, des Sci. Nat., vol. 32, 



p. 380, pi. 117, fig. 5. 



