16 



AUGUST BRINKMANN. 



[REP. OF THE "MICHAEL SAKS" NORTH 



sions given below can therefore hardly be considered as 



any standard for the species. 



Length 10 mm., greatest breadth 2.25 mm., greatest 



thickness 1.2 mm. 



The circular musculature beneaht 

 the epithelium is extremely thin, pro- 

 perly existing as a layer only in the 

 rear third of the body, where also 

 the longitudinal musculature reaches 

 its greatest development; it is ex- 

 tremely thin laterally, and forms a 

 dorsal and a ventral muscular plate 

 of 65 ft maximal thickness. 



Mouth and proboscis pore are 

 separate. Oesophagus lacking. The 

 stomach is small and short, passing 

 over immediately behind the brain 

 into the pyloric tube, which is rela- 

 tively long. The intestine is narrow, 

 and furnished with about 30 pairs 

 of extremely large but only slightly 

 ramified diverticula; the appearance 

 here should as a matter of fact rather 

 be described as broad, short protu- 

 berances than actual ramification; 

 there is no trace of any ventral 

 branch. The intestinal caecum is very 



strongly developed, and furnished 

 Textfig. 1, C.lanceolata; &J . v ' 



In the fore end the testicles Wlth flve P airs of diverticula. The 



are seen as black spots, fore end of the caecum extends in 



front of the brain. 



The proboscis attains a length about twice that of 

 the body; its stylet apparatus resembles that of the 

 remaining pelagic nemerteans, and there are 21 pro- 

 boscidial nerves developed. 



The proboscis sheath terminates about 1 mm. from 

 the hinder end of the body. The musculature in its wall 

 behind the brain consists of an inner longitudinal and an 

 outer circular layer. 



The cerebral ganglions are large. With regard to 

 the lateral nerves it may be noted that their caudal com- 

 missure is situate behind the ventral anus. 



The specimen examined was a male. The testicles 

 were numerous, 19 being developed on the right side, 

 and 12 on the left; they are only found in the fore-part, 

 where they lie close to the lateral nerves (Textfig. 1), and 

 are still in their first stage of development, forming small 

 sacs about 0.08 mm. long, in which as yet only a single 

 layer of cells with large nuclei is visible; the disharge 

 ducts are not developed. 



Habitat: St. 92 (Lai. 48" 29' N; long. 13° 55' W). 

 23 :. Depth about 1000 metres (1500 metres of wire). 



Armaueriidae nov. fam. 



Fore part of the body broad, the posterior end 

 tapered and ending in a feebly developed caudal 

 fin. The intestinal diverticula without a ventral 

 branch. The dorso-median vessel developed in its 

 full length, but at no place being in connection with 

 the proboscis sheat. Dorsal commissure of the 

 vessels in the head lacking. Testicles arranged 

 in two almost regular rows in the head, never 

 united to groups. 



Armauer/a nov. gen. 

 Characters of the family. 



Armaueria rubra n. sp. 



No figure of the animal was drawn as only the 

 series of sections made me aware of the fact that three 

 specimens — 2d" and 1 $ - - in the material belonged 

 to the above mentioned new genus and family and that 

 they not, as one should believe judging from the form 

 and size of the body, constituted a species of the well 

 known genus Pelcigonemertes. 



The fore part of the body is rounded and in the 

 proboscis sheat region very thick and only slightly 

 flattened. The caudal fin is feebly developed. The species 

 belongs to the dwarfs among the pelagic nemerteans 

 (5, 3 — 8,8 mm., with a greatest breadth of ca. 2,5 mm. 

 and a greatest thickness of up to 1.5 mm.). 



The circular muscle layer of the body wall is strongly 

 reduced in all parts of the body; in the fore part and the 

 sides of the body the same is the case with the longi- 

 tudinal muscle layer, but dorsally and ventrally in the 

 middle of the body and towards the tail these muscles 

 form a strong layer 100 — 115 ,u thick. 



The opening of the mouth is placed terminally and 

 leads directly into the stomach; this and the pyloric tube 

 are short, and the latter opens close behind the brain in 

 a very wide intestine, furnished with about 25 pairs of 

 unbranched lateral pouches. The intestinal caecum is 

 short and only provided with one pair of diverticules. 



The proboscis is considerably longer than the animal 

 and is coiled up in its sheat. In the part next to the 

 insertion 14 nerves are developed in the proboscis wall 

 but more distally the number is reduced to 7. The 

 armature of the proboscis is like that found in Dr pano- 

 phorus. 



The proboscis pore is situated dorsally, leading 

 into a short rhynchodaeum, which forms an angle with 

 the proboscis sheat, which is short and of an ovoid shape 

 and generally does not enter the rear half of the body. 

 The musculature of the wall is anteriorly composed of 

 an inner circular and an outer longitudinal layer but close 



