402 bulletin: museum of comparative zoology. 



Since VanhofFen (1913b) has demonstrated the unity of L. unguicu- 

 lata and L. aquila, all known representatives of Linuche belong to this 

 combined species. The present series adds nothing to the previous 

 accounts. 



SIPHONOPHORAE. 



Sphaeronectidae Huxley. 



{Sensu Bigelow, 1911b). 



Moser (1912a, p. 528) has revived the name Monophyidae for this 

 family. But although this term is more descriptive than Sphaero- 

 nectidae, in its indication of the structural simplicity of the forms in 

 question, the International rules of zoological nomenclature forbid 

 its use, Monophjes of Claus (1873) being undoubtedly a synonym of 

 Sphaeronectes Huxley (1859). 



MuGGiAEA spiralis (Bigclow). 



Diphyes sjnralis Bigelow, 1911b, p. 249, pi. 7, fig. 4, pi. 8, fig. 1, 2, pi. 9, fig. 3, 



pi. 11, fig. 4; 1913, p. 76. 

 Muggiaea spiralis Moser, 1915b, p. 654. 



This easily recognized species was taken at Stations 10,161, 10,162, 

 10,163, 10,166, 10,169, 10,171, 10,172, 10,173, 10,176, 10,178, 10,180, 

 10,182, 10,186, 10,188, 10,212; the captures being both in intermediate 

 hauls and on the surface. The material consists of about 40 necto- 

 phores; 2-3 mm. long. 



As additional specimens of M. spiralis are studied it becomes in- 

 creasingly certain that it is a monophyid, as Moser (1913a, p. 147, 

 1915b) maintains, not a diphyid, as I formerly supposed. My original 

 location of it in the latter family was due to the presence, in two speci- 

 mens, of " a very small bud which was apparently the forerunner of a 

 posterior nectophore" (1911b, p. 251). But these buds were proba- 

 bly either very young siphons or gonophores, because neither Moser, 

 nor I, have found an inferior nectophore, or even any bud far enough 

 advanced to be surely identified as such, although a considerable 

 number of specimens in good condition, have now been studied. 



Further than this, the present series adds nothing to my earlier 

 description. 



