•334 NATURAL HISTORY OF 



1. L. SINGULA RE, Keferstein. 



Hab. : On annelids, Shetland [McI.]. 



The species of this genus are solitary, and are 

 attached when young by a pedal gland •which serves 

 as a stolon. 



2. L. PHASCOLOSOMATUM, Carl Vogt. 



Hab. : On annelids, Bantry Bay {A. M. N.). 

 Described by Rev. A. M. Norman in Ann. of Nat. 

 Hist, for February, 1879, p. 133. 



3. L. CLAviFORME, HincJcs. 



Named from specimens in spirit obtained by Dr. 

 Mcintosh at Guernsey. 



Sub-class Pterobranchia, Bay LanJcester. 



Lo2yho2jliore 2^'>'oduc€d on each side into a ^orocess on 

 luhich alone the tentacles are developed, forming dis- 

 continuous series. 



Order PODOSTOMATA, Fiay LanJcester. 

 Foot large, overhanging the mouth. 



FAMILY RHABDOPLEURID^. 



Zoarium a chitinous, adherent tube, divided by septa 

 into compartments, from which erect tubular cells rise, 

 in which the polypides are lodged; the whole of the 

 adherent portions traversed by a chitinous cylindrical 

 rod, to which the polypides are attached by means of a 

 flexible cord j endocyst not differentiated, and the poly- 

 ])ide consequently unattached to its cell; retractor and 

 other muscles absent ; a large shield-like organ (foot) 

 placed near the mouth; the young {bud) furnished with 

 tivo valve-like fleshy pjlates. — T. H. 



