106 TUNICATA. 



the closed end, broad and truncated at the open end ; thin, translucent ; 

 zooids distant, long. Pale yellowish. Length, 4 - 5 ; breadth, 175. 



FAMILY SALpnxs:. 

 Animal free, oceanic ; alternately solitary and aggregated. 



SALPA. 



Oblong, sub-cylindrical, truncated in front by the oral orifice, 

 pointed posteriorly ; anal orifice sub-terminal ; test thin, transparent ; 

 muscular mantle incomplete, forming a set of transverse or oblique 

 bands ; gill rudimentary, forming an oblique band across the interior ; 

 visceral nucleus posterior. 



North Sea. Europe. Australia. 



8. S. COStata, Quoy, I.e., in., p. 570. Large, rounded in front, 

 bicaudate behind ; below canaliculate, gibbous, slightly spinose, spotted 

 with greenish white ; muscular bands in four distinct series ; mouth 

 terminal. 



Seas of New Zealand (Quoy). 



* 9. S. infundibuliformis, Quoy, I.e., Hi., p. 587. Anterior 

 end thick, cartilaginous ; posterior gibbous below ; mouth terminal ; 

 posterior girt with tubular muscular bauds. 



Pacific Ocean, between New Zealand and the Friendly Islands 

 (Quoy). 



10. S. mucronata, LamarJc, I.e., i\i., p. 516. Ovato-cylindrical, 

 truncated at each end ; mouth lateral ; muscular bands five, with their 

 dorsal ends separate ; smooth ; constricted below the mouth ; nucleus 

 large, globular. Length, 1'2 ; breadth, '3. 



DOLIOLUM. 



Transparent, cask-shaped ; open at both ends ; small ("16 to '83 in 

 length) ; oral extremity a little prominent, with about twelve rounded 

 denticulations ; posterior end fringed ; muscular bands six, equidistant, 

 besides the sphincters of the orifices ; branchiae consisting of two 

 bands stretched across the interior, one above and one below, connected 

 by transverse bars with one another and with the parietes ; mouth on 

 the dorsal side, in front of the fourth band ; heart above and in front 

 of the mouth. 



Moluccas and New Zealand. 



* 11. D. dentiCTllatum, Quay, I.e., Hi., pi. 89,/! 25-28. Small, 

 hyaline, ovato-cylindrical, sub-truncated, perforated at both ends, 

 anterior creuulated, with eight salient bauds. Length, '16. 



New Zealand (Woodward's Mollusca). Molucca Islands. 



ADDENDUM. 



The following additional species is described by Dr. von. Martens 

 in his list referred to in the Preface : 



