LAMELLISABELLIDAE 421 



tentacles are not joined together; the protosoma is not divided from the 

 mesosoma; and there are adhesive plaques on some of the preannular 

 papillae. Of the genera in this family the species seems to be most closely 

 related to Zenkevitchiana, which it resembles in the following ways: the tube 

 is thick-walled and lacks overlapping collars; the protosoma is not separated 

 from the mesosoma; the tentacles do not have pinnules; there are adhesive 

 plaques on the nonmetameric papillae but not on the metameric papillae; 

 the adhesive plaques are oval or round; and the preannular region is com- 

 paratively long. 



"There are several differences which suggest that the species does not 

 belong to the genus Zenkevitchiana: the tube is very wrinkled and is not 

 divided into segments; the cephalic lobe is separated from the rest of the 

 protosoma by a transverse groove; the mesosoma is not separated from the 

 metasoma; there are two latero-ventral ridges containing separate glands 

 instead of separate metameric papillae each containing several glands; and 

 there are only two tentacles. 



"I have decided to establish a new genus to include this species. I should 

 have liked to name it after Professor Caullery but unfortunately the suitable 

 names are preoccupied. I have therefore named it Sclerolinum, which is 

 descriptive of the stiff thread-like tube." 



Material: 30 fragments of tube, more than half occupied. 



Localities: Ceram, Flores, Java and Arafura Seas: Siboga stations 175, 

 210A, 212, 271 (2°37'S 130°35'E, 5°28'S 123°18'E, 5°54'S 120°19'E, 

 5°46'S 134°E). 



Depth: 462-1914 m.] 



П. Family Lamellisabellidae Ushakov, 1933 



The name Lamellisabellidae was first used by Ushakov (1933) to designate 

 a new subfamily of sedentary polychaetes (as he thought) of the family 

 Sabellidae, to which, he believed, belonged the species he described as 

 Lamellisabella zachsi. In 1951 Ivanov assigned this name to a family of 

 Pogonophora. The tentacles are arranged in a circle and fused together into 

 a hollow cylinder. Only one genus is known, Lamellisabella. 



1. Genus Lamellisabella Ushakov, 1933 



Ushakov, 1933: 205-8 ; Johansson, 1937: 23-6; Reisinger, 1938: 49 ; Johansson, 1939: 

 253-68; Ushakov, 1940: 76, 77; Hemplemann, 1943: 78; Beklemishev, 1944: 257-9; 

 Ivanov, 1949: 79-84; Ulrich, 1950: 3-25; Beklemishev, 1951: 267-9; Hartman, 1951: 



