MISCELIvANEA. 

 TUNICATA. 



Some Salps taken by R.l.M.S.S. ''Investigator" in the 

 Bay of Bengai, and Andaman Sea.— Hitherto, the Salpidae of 

 Indian seas have not received much attention, but of late years 

 owing to a more systematic use of the towruet, and the introduction 

 of a mid-water net on board the " Investigator," a foundation has 

 been laid for future work. 



The following remarks are merely intended to record the 

 presence of certain species in the Andaman Sea and Bay of Bengal. 

 The species were all obtained during the months from October 

 to April that comprise the survey seasons of successive years: 

 the data are quite insuflficient to give any idea of the distribution 

 or relative abundance of each species. 



I. Cyclosalpa hakeri, Ritter, 1905. 



Of this I have only found one specimen of the solitary 

 generation, obtained in a surface tow-net near Preparis North 

 Channel (i5°25'N., 93°45'E.) on i6th November, 1909. 



This is a small example measuring only 5-4 mm. It agrees 

 very closely with Ritter's description (Publ. Univ. CaUf., vol. 2) 

 having muscle C and all the body muscles ' interrupted dorsally. 

 But the " lateral organs" number only four on each side, there 

 being none between muscles i and 2. Muscle 6 also does not seem 

 to be continued into a longitudinal band near the mid-dorsal line. 

 In all other characters, such as the ventral incHnation of the 

 anterior end, the structure of the brain, hypophysis and viscera, 

 the arrangement of the muscles at the branchial and atrial orifices, 

 it exactly agrees with Ritter's description. It is evidently quite 

 a young specimen, still possessing placenta and elaeoblast. 



2. Salpa jusiforinis, Cuvier. 



A few examples of the aggregate generation, all of the typical 

 variety, were obtained at the same locality as the previous 

 specimen. 



3. Salpa cylindrica, Cuvier. 



Both the solitary and aggregate generations are extremely 

 common in the neighbourhood of the Mergui Archipelago. They 



1 In the lettering and numbering of the particular muscles I have followed 

 the designations given by Dr. Ihle in Das Tierreich, May, 1912 



