tou2,pt. 2.] A TAXONOMLC STUDY OF THE SALPIDAE METCALF. 147 



The eye shows the usual horseshoe shape. Its histology has not 

 been studied, since we were unwilling to sacrifice our sole specimen 

 of the subspecies. For the same reason the neural glands and the 

 outgrowths from the ganglion have not been observed. 



TRAUSTEDTIA MULTITENTACULATA (Quoy and Gaimard, 1826-1834). 



Salpa multitentaculata Quoy and Gaimard, 1826-1834. 



S. verrucosa Apstein, 1894, b. 



S. multitentaculata Ihle, 1911, in part. 



SOLITARY FORM. 



In his report upon the Thaliacea of the Plankton Expedition, 

 Apstein (1894, b) describes a single specimen (fig. 133) which he took 

 to be an aggregated zooid, but which proves to be a solitary salpa. 



Fig. 133.— Tramstedtia multitentaculata, solitary form, viewed from the left side, x 

 diameters. from apstein (1894, 6). 



It differs markedly from our specimen but still seems to belong to the 

 same species. He describes a single dorsal crest, but his only speci- 

 men was strongly laterally compressed, so the two crests, if present, 

 may have appeared as one. The test was greatly thickened ventrally 

 and his figure shows lines connecting the anterior and posterior edges 

 of the crest with the thickened area of ventral test, just as we have 

 shown them for our specimen. The form of the body is evidently 

 quite similar in Apstein's specimen and ours. Apstein describes and 

 figures four pairs of "tentacles" corresponding to the larger four 

 pairs in our specimen. He does not describe the other five similar 

 but less developed structures which we show in our form. He may 

 have overlooked them, for they are not prominent. 



