Notes on the morphology of the Tunicata. 521 



in Molgula mdnhattensis, nor on the right side, as in Molgula are- 

 nosa (?); nor is it ventral. It lies partly below and partly to the 

 right of the ganglion, i. e. it is dextro-ventral in position (cf. Fig. 34). 

 The ciliated funnel is trumpet-shaped (Fig. 35), its upper end 

 being bent toward the right side of the ganglion. Numerous, deeply 

 staining ^) gland cells lie amoog the ciliated epithelial cells of its 

 flaring lips. 



Herdmania bostrichobranchus n. g. 



Plate 36, Figs. 36 and 37. 



In this species the gland lies nearly ventral to the ganglion, in 

 the swollen upper end of the dorsal raphe. It is very large, about 

 eight times the size of the brain. The large coiled funnel connects 

 with the duct which leads back along the ventral surface of the 

 ganglion somewhat to the right of the median line. The gland shows 

 no features of special interest. Posteriorly the duct of the gland is 

 continued as the rudimentary rapheal duct which, as in the Molgulas, 

 leads only to the upper end of the raphe. 



The rapheal nerve has very many gauglion cells along its course. 

 There is a great collection of these at the upper end of the raphe 

 near the ganglion, and another very large elongated ganglionic mass 

 at the lower end of the raphe, lying along the wall of the stomach. 

 This great ganglion lies along one whole side of the stomach, stretch- 

 ing through the whole of the lower third of the raphe. Between 

 this ganglion and the one at the upper end of the raphe, the rapheal 

 nerve is composed chiefly of fibres with but few cells. 



The innervation of the duct of the gland at a point just above 

 its union with the ciliated funnel is shown in Fig. 36 at the point 

 marked x, and more clearly in Fig. 37, which is an enlarged drawing 

 of part of the same section. There seems in this case little doubt 

 that this nerve, which evidently corresponds to the antero-ventral 

 nerve of Ciona, distributes its fibres to the epithelium of the duct 

 and funnel. At one point the section was very slightly torn (y of 

 Fig. 37), and the fibres of the nerve were pulled away from the 

 ciliated epithelium. It is here very clearly seen that parts of many 

 of the fibres are left clinging to the epithelium, proving the actual 

 union of the nerve fibres with the epithelium. I believe it highly prob- 



1) With haematoxyliu. 



