Notes on tbe morphology of the Tunicata. 541 



Cyclosalpa chamissonis Brooks, chain form. 

 Plate 39, Fig. 77. 



This species so closely resembles Cyclosalpa pinnata that I need 

 refer to but a single point. In the ventro-lateral chambers of the 

 neural gland, one sees that the epithelium of their dorsal walls, the 

 side toward the ganglion , is very much thicker than that of their 

 ventral walls and of the duct (Fig. 77). The small-celled ventro- 

 lateral ganglia lie just above these areas of thickened epithelium close 

 pressed to the basement membrane of the epithelium. 



Saliva africana-maxima, chain form. 

 Plate 39, Fig. 78. 

 In this species again we have a similar condition of the gland. 

 The ventro-lateral chambers and their ducts are, however, very large. 

 On the dorsal wall of the chambers the epithelium is a greatly 

 thickened, the cells forming an irregular mass, filling most of the 

 lumen of the chambers. These cells are many of them degenerating. 

 We see, then, here a clear indication that the ventro-lateral chambers 

 are glands which form their secretion by the degeneration of cells 

 proliferated from part of their lining epithelium. No comment is 

 needed upon the similarity to the neural gland of Ascidians and 

 Pyrosoma. 



Salpa runcinata-fusiformis Cham.-Cuv. 



Plate 38, Fig. 58, and Plate 39, Fig. 79. 

 The anatomy of the neural gland in this species is almost identical 

 with that in Salpa africana-maxima. In ventral view (Plate 38, 

 Fig. 58) one sees the large chambers of the gland and the coiled 

 ducts which connect them with the pharynx (or cloaca?). Observe 

 that the right chamber is much larger than the left. The ventro- 

 lateral ganglia do not appear in the figure, being hidden by the 

 chambers of the gland. They are small in the chain form of this 

 species, though of normal size in the solitary form. With this ex- 

 ception, the relations are the same in both the chain and solitary 

 forms. 



Halpa cylifidrica Guv. 



In the solitary form of Salpa cylindrica the neural gland is as 

 it is in the other two Salpas described. But one feature deserves 



