vol. 2, ft. 2.] A TAXONOMIC STUDY OF THE SALPIDAE METCALP. 151 



bending forward at its upper end to form what appears to be the 

 homolog of the dorsal horizontal band of other species. 



Apstein shows an oral retractor continued in front to form a single 

 complete sphincter in each lip. Dober shows an oral retractor con- 

 tinuous with a complete sphincter in one lip (dorsal or ventral?), 

 but no sphincter in the other lip. 



a.o. J? 



Fig. 136. — Transtedtia multitentaculata, aggregated zoOid, viewed from the right side. 

 X 2 diameters. From Apstein (1904). 



Two embryos are said by Apstein to be borne by the aggregated 

 zooids in all cases; Traustedt observed but one, this very young. 



Traustedt describes the ganglion and eye, and Dober gives a still 

 clearer figure which is here copied (fig. 137). The eye apparently is 

 very similar to that of 

 Pegea, the homologies / 



of whose parts I have 

 already discussed. 



Beneath the ganglion 

 are a pair of lateral 

 disks forming the sub- 

 neural gland. Dober 

 does not describe their 

 ducts, but these are 

 doubtless present. 

 Dober refers to the 

 disks as auditory or- 

 gans. Of course there 

 is no ground for at- 

 tributing any such 

 function to them (see 

 Metcalf, 1893, c). 



All the aggregated Traustedtias hitherto described seem to belong 

 to the species multitentaculata. Quite possibly some belong to its 

 subspecies bicristata. The collections need to be restudied to de- 

 termine this point, which is suggested by the discrepancy between 

 the several descriptions. If both subspecies are represented, those 

 with more rudimentary oral muscles probably should be assigned 



Fig. 137.— Transtedtia multitentaculata, aggregated form t 



DORSAL VIEW OF THE GANGLION AND EYE. THE DISKS OF THE 

 SUBNEURAL GLAND ALSO SHOW IN PART. FROM DOBER (1912). 



