MOLLUSCA OF PLYMOUTH. 439 



There were no orange spots on the cerata. The rhinophores had a 

 band of reddish pigment in the same region as the band of brown 

 in G. picta. 



In motion the oral tentacles were kept horizontal upon the bottom, 

 and were then generally flattened out at the tips (cf. Mcintosh on 

 Eolis Andreapolis, 1. c). When the light was suddenly cut off from 

 these individuals the action was followed by a slight erection of the 

 tentacles, and by short restless movements of the head and anterior 

 cerata — the animals having previously been quite still. But the 

 cerata were not erected by this stimulus, although they were by 

 touching the head as above described. The eyes were distinct, but 

 not unusually large. 



These two individuals were taken on May 14th. Two days later 

 they had laid two ribbon-like pieces of spawn, which were not attached 

 to the sides of the dish, but floating on the surface of the water. 



On June 25th a smaller individual was obtained from the same 

 place, orange-coloured all over, but possessing patches of a deeper 

 reddish-orange and brownish colour on the back. The tips of the 

 cerata were also more intensely orange-coloured. 



On October 16th two very small specimens (2 mm. long) were 

 found among Obelia on Laminaria trawled at Batten. 



29. *Galvina cingulata. Aid. and Hanc. 



Another individual of this species was found on August 21st 

 among Cladophora from either Drake's Island or below the bathing 

 pond. It measured y^ inch in length. The lateral lines of olive- 

 brown between the cerata were well marked, as also the patch of the 

 same pigment behind the rhinophores. The cerata were arranged 

 abnormally. Usually the rows of cerata on one side of the body 

 are in the same transverse lines as those of the other side ; but in 

 this individual only the first and second rows were so arranged ; the 

 five succeeding pairs of lateral rows were arranged alternately, not 

 in the same transverse lines. The heart was situated in the centre 

 of the second transverse row of cerata. 



Sub-family 4. — Coryphellin^. 

 22. CoRYPHELLA, Gray. 



.30. "^CoRYPHELLA RUFIBRANCHIALIS, JohnstOfi. 



No additional examples of this species have been taken during 



the past year, unless further observations should confirm Trin- 



chese^s view that the two following " species " are merely varieties 



of C. rvfihranchialU. Herdman^ and Clubb, however, have had good 



^ Third Report on Kudibranchiata, 1. c, pp. 140 — 143. 



