517 



von Meves 11 beschriebenen »Richtungskörperbildung« der Spermato- 

 cyten bei der Honigbiene zeigen. — Es dürfte sich wohl verlohnen, auch 

 bei diesem Objekt das Verhalten der Chromosomen noch eingehender 

 zu verfolgen. Schon jetzt darf es als sehr wahrscheinlich bezeichnet 

 werden, daß auch hier die Chromosomenverteilung eine inäquale ist, 

 und daß nur diejenigen Spermatiden funktionierende Spermien liefern, 

 welche den Spermatiden mit Heterochromosoma bei andern Insekten 

 entsprechen. — 



4. A new species of Dolichoglossus. 



By Richard Assheton, M.A. Trinity College, Cambridge. 

 (Lecturer on Biology in the Guys Hospital Medical School, University of London.) 



(With 2 figs.) 



eingeg. 29. Juli 1908. 



During last summer I found a species of Dolichoglossus in the lit- 

 toral zone of the shore of the sound of Mull off the west coast of Scot- 

 land, the occurrence of which I should like to record here, and to give a 

 short description of the form and habits of the animal. It is small in 

 diameter, but much elongated. — Its most characteristic feature is the 

 great length of the proboscis, which is cylindrical rather than conical 

 in shape, and in fully contracted specimens it may measure six to eight 

 times the length of the collar, while in its extended state it becomes 

 greatly attenuated and may measure twenty times or more the length 

 of the collar. 



The measurements of the animal may be given as follows, though 

 they must be regarded as approximate only. 



Total length 200 mm and upwards; breadth 3 mm in the region of 

 the gill clefts tapering gradually towards the anus. The collar measures 

 4 mm in length by 3 or 3,5 mm in breadth. The proboscis when con- 

 tracted measures from 25 to 35 mm in length. The proboscis is of a 

 bright rosy red, the collar a deeper and more orange red, with a dis- 

 tinctly lighter posterior rim. The trunk shades gradually from a rich 

 orange behind the collar through deep yellow to a light yellow in the 

 extreme posterior region. 



Starting in the hinder part of the branchial region and extending 

 to the posterior end there are bright vermilion spots which are raised 

 into minute spinous processes arranged in irregular series on each side. 



The gut walls of the post branchial region are brown, and for a 

 short distance this condition extends into the trunk. 



11 Meves, F., Die Spermatocytenteilungen bei der Honigbiene. In: Arch, für 

 mikrosk. Anatomie Vol. 70. 1907. 



