you 2, pt. 2.] A TAXONOMIC STUDY OF THE SALPIDAE METCALF. 173 



S. suborbicularis Quoy and Gaimard, 1824, not a salpa. 



S. triangularis Quoy and Gaimard, 1824, apparently not a salpa. 



S. tricuspida Lesson, 1832, apparently lasts zonaria, solitary. 



S. tricuspidata Quoy and Gaimard, 1824, can not be identified. 



S. tricuspidata Sars, 1829, is said by Traustedt (1885) to be S.fusiformis. I have 



not succeeded in finding in this country this paper of Sars. 

 S. vaginata Chamisso, 1819, can not be identified with certainty; it may be S. 



fusiformis, subspecies aspera, solitary form. 

 Thalia lingulata Blumenbach, 1910. Traustedt regards this as Thalia democratica. 



The identification seems probable. 



GENERIC AND SUBGENERIC NAMES. 



The following list shows the first use of the several generic and sub- 

 generic names applied to Salpidae : 



Apsteinia, Metcalf, in this paper. 



Biphora Bruguiere, 1789. 



Brooksia, Metcalf, in this paper. 



Cyclosalpa de Blainville, 1827. 



Dagysa Banks and Solander, 1773. 



Dubreuillia Lesson, 1832. 



Holothuria Linneus, 1758. 



Holothurium Pallas, 1774. 



Iasis Savigny, 1816. 



Pegea Savigny, 1816. 



Pyrosomopsis [= Cyclosalpa] MacDonald, 1863. 



Ritteria Metcalf, in this paper. 



Salpa ForskAl, 1775. 



Thalia Browne, 1756. 



Thetys Tilesius, 1802. 



Traustedtia Metcalf, in this paper. 



Pterolyra Lesson, 1832, is not a salpa. 



KEY TO THE SUBGENERA AND SPECIES OF SALPIDAE. 



A. Intestine in the solitary forms a straight tube dorsal to the gill. In the aggregated 

 zooids it is either a straight tube or is bent into an open loop. 

 Dolichodaea. One genus, Cyclosalpa. 



a, 1 Aggregated zooids bilaterally symmetrical. Terminal zooids of stolon de- 

 tached in the form of a whorl. Cyclosalpae symmetricales. 

 a, 1 Luminous organs 5 pairs in solitary form, 1 pair in aggregated form; 

 body muscles in solitary form all interrupted dorsally: intestine 

 in aggregated zooid a straight tube below the endostyle. 



(type l ) pinnata. 

 a, 2 Luminous organs wanting in both solitary and aggregated forme: 

 posterior 5 body muscles in solitary forms complete dorsally: 

 intestine in aggregated zooid an open vertical loop in the median 

 plane, anus in front of esophageal aperture. affinis. 



a, S Luminous organs in solitary form 5 pairs, the first and last slightly 

 developed or almost wanting; luminous organs altogether absent 

 in aggregated zooids; caeca, 2 in solitary form, 1 in aggregated 

 form, globular; body muscles in solitary form all interrupted 

 dorsally; testis in the aggregated zooid occupying a large conical 

 postabdomen within a swollen mass of test. fioridana. 



The author prefers the latin form typus in strictly taxonomic use of this word. 



