Q R. C. Punnett. [No. 2 



As is pointed out later the distribution of one of these new 

 spedes, Cerebratulus longifissus, is very peculiar. So far as is 

 known it occurs only in Norway and in the South Atlantic off 

 Marion Island. At present it remains a puzzle. 



A small point of interest from a morphological point of view 

 has arisen in connection with Lineus einerens (P. 18). The oeso- 

 phageal nerves meet below the oesophagus, which is consequently 

 surrounded by a complete nerve ring. This structure I have also 

 found in other Heteronemerteans but in none of the more primitive 

 members of the phylum. 



I have given below a synopsis of the species contained in the 

 collection with brief diagnoses of new species, after which follows 

 a more detailed account of the different forms. 



I. ProtonemertinL 

 Fam. Carinellidae. 



Page 



1. Carinella ambigua n. sp. Medium sized form, bright red in 



life. Head spathulate. Cerebral organ large. Muscle 

 crosses of body wall absent. Probably no side organ. 



Head glands large 8 



2. Carinella polymorpha (Rekler, 1804) 11 



3. Carinella linearts (Mc Intosh, 1873) 11 



I. Callinera Imergeri (Bergendal, 1900) 12 



II. Mesonemertiiii. 



(None.) 



III . Heter on em erthii. 



Fam. Eupoliidae. 



5. Eupolia sp 12 



Fam. Lineidae. 



6. Linens niveus n. sp. Small white form. Cutis in a 



primitive state. Irregular cephalic vascular lacuna. 

 Head slits shallow. Frontal organ rudimentary. Ex- 

 cretory system with 1 pair of ducts. No eyes. Rhyn- 

 chocoelom to posterior end. Proboscis 3 layered with 

 muscle crosses 13 



