of the Fishery Board for Scotland. 



51 



jet-black patch on the base of the caudal fin. The fourth is a lighter and 

 smaller bar situated midway between the third and fifth. The yolk-sac is 

 long, and elliptical in shape. The bronze or golden oil globule is posterior. 

 There was still a considerable quantity of yolk present. 

 On May 29th all the larvae were dead. 



A Post-larval Arnoglossus (Figs. 14 and 16). 



The little fish, which was captured by the Garland at the mouth of the 

 Clyde, between Sanda and Brennan Head, on 12th September, 1899, is 

 shown enlarged in fig. 14. The tow-nets were being worked at 15 and 20 

 fathoms. The specimen is a little injured. It is symmetrical ; the two 

 eyes occupy practically identical positions on opposite sides. 



In greatest length it measured 9 mm. ; it was 4 mm. in greatest breadth. 

 The number of rays in the dorsal fin was 79 + , and in the anal fin 56 -f. The 

 fin-rays were not clearly separated off in the posterior part of the dorsal 

 marginal fin, nor at either end of the anal marginal' fin. The fin- rays are 

 formed of a number of longitudinal strands. The vertebrae were made out 

 to be about 39 ; they were counted by aid of the muscle segments. One 

 tooth was made out on each side in the upper and lower jaws. 



The most noteworthy feature of the little fish was the presence on the 

 forehead of two «very long delicate filaments. These filaments were jointed, 

 and proved to be the two halves of the "single cephalic" tentacle. Gunther* 

 described and figured certain larval Pleuronectids which were obtained by 

 the Challenger Expedition off Sierra Leone. They measured 6 and 7 mm. in 

 length, and they had the long frontal filament. They evidently belong to the 

 genus Arnoglossus. The possession of this tentacle characterises, as Raffaele 

 and Ehrenbaum showed, the early stages of Arnoglossus. An enlarged 

 drawing of the top of the head of this example is given in fig. 16. A little 

 posterior to the first ray (1) there is a second (2), which is larger and stouter 

 than the ray that succeeds it. It is not clear whether this ray is shorn 

 of its natural length. It is injured, but whether shortened or not I did not 

 make out. It is not like the next succeeding rays (fn.), split into many 

 fine strands. It appears to have a different character from them. 



The top of the head is furnished with short needle-like spines on either 

 side of the beginning of the dorsal fin, and coming down for a little distance 

 on the right side of the skull. Ehrenbaumt has described several young 

 individuals of this genus. Lately the question of the descrimination of the 

 species of these larvae has been treated by Petersen. + I have not been able 

 to satisfy myself as to the specific identity of the specimen just recorded. 



A Rare Angler — ffimantolophus Reinhardtii, Liitken. (Figs. 22, 27, 28). 



A specimen of this fish was landed at Aberdeen in March 1 908, by a 

 trawler which had captured it in Icelandic waters. It was courteously pre- 

 sented by Mr. Eunson. It was preserved in formaline for some time before 

 being examined. 



It is jet-black in colour, on the ventrum as well as on the back and sides, 

 except where some pale grooves on the skin give it a greyish tinge. It has 

 a dumpty tapering body, being veiy high in comparison to its length (fig. 

 27). It measures 16 inches (40'5 cm.) in length, 8| inches (21 cm.) in 

 breadth, and 4g inches (12 cm.) in greatest height. When viewed from 

 above it is pear-shaped (fig. 22). 



* "Report on the Pelagic Fishes collected by H M.S. Challenger." Zoology, 

 Challenger Expedition. Part LXXVI1I. 1889. 



+ Nordisches Plankton, Eier u. Larven von Fischen, I., p. 190. Kiel, 1905. 



t Meddelelser fra Kommissionen for Havundersogelser. Fiskeri, Bind. III. "On 

 the Larval and Post-larval Stages of Zeugopterus, Arnoglossus, Solea." Copenhagen, 

 1 909. 



