144 Piof. M'Intosh's Notes from the 



g'ies on readily, yet it is stated tliey grow in quiet nooks at 

 Dongonab. The long branchife are richly pigmented, and 

 each animal is provided with a pair of eye-specl<s composed 

 of a group or crescent of four or five points. IMie web at 

 the base of the tip .-f the collar- i)risiles has eiglit or nine 

 teeth. Tiie tips of some of the branchi* in a few jire 

 enlarged. In others this is not seen. One had more slender 

 jjinnae than usual, and in this the tips of two of the filaments 

 presented enlargements of the sausage-shape with lateral 

 glands as in S. adificatrix. All have six pairs of anterior 

 bristles, viz. first and five following. No opercula are 

 })reseut. One or two buds (early) were attached, to the 

 nurse-stock; and many young forms occurred. Buds thus 

 develop in the quiescent condition of the reproductive 

 element.*, which were not visible. 



Dongonab, Red Sea. 2.2.1916. 

 Since December (1915) the reproductive elements have 

 been developed, the large ova occurring in masses in the 

 non-bristled region behind the " thorax," leaving the posterior 

 and caudal regions free. In some the spiices between the 

 septa were filled with a uniformly granular mass. In a 

 small form, which seemed to be male, the elements filled the 

 posterior and caudal regions to the tip, whilst anteriorly the 

 masses reached the thoracic border. No buds were observed 

 in this series. The tips of the branchial filaments were 

 slightly enlarged in some ovigerous forms, the outline 

 being ovoid rather than sausage-shaped as in S. oedificatrix, 

 and in this respect they agreed with those procured in 

 December, and in which the reproductive organs were not 

 developed ; indeed, some of the latter had large processes, so 

 that this does not appear to be connected with the develop- 

 ment of the gonads. The young as well as the adults pre- 

 sented the same slight enlargements of the terminal processes 

 of the branchial filaments. 



Dongonab, Red Sea. 5.1916. 

 Since February the reproductive elements in the body have 

 disappeared^ and more frequent instances of budding present 

 themselves, the buds arising in a similar manner from the 

 posterior end in front of the pygidium which forms the anal 

 extremity of the bud. The tentacles develop early, and 

 enable the eye to detect the bud even when very small. At 

 a little later stage the outline anteriorly is marked by a 

 separate and symmetrically sha];ed area — apparently tlie 

 rudiment of the " thorax." 



