8 



R. COLLETT. 



M.-N. Kl. 



Of late years L. gracilis is only mentioned, as having been redis- 

 covered, by one author. 



Amongst the materials collected by the «Ingolf Expedition» to the 

 shores of East Greenland, were two individuals caught in Davis Straits 

 at a depth of 88 fathoms, the ii'h July 18961. These specimens which 

 I, through the courtesy of Dr. Lütken, have had an opportunity of 

 examining, ajipeared to agree in all respects with those from the Skagerak 

 and shores of Norway. 



Their measurements were as follows; 



a. Total length 143 mm.; length of head 28 mm. Height above 

 the anus 14 mm. 



b. Total length 244 mm.; length of head 49 mm. Height above 

 the anus 26 mm. 



Remarks on the Synonyms. 



1. L. perspicillam, Kr. 1844. Originally 2 young specimens 

 were known, whose total lengths were 39 and 6^ mm., but of these only 

 one now exists (Copenhagen Museum). 



The markings resemble those of L. rossi and L. gracilis, but the 

 lateral line is medio-lateral, and the body already covered with scales. 



In 1898, I advanced the assumption ^ of L. perspicillum being the 

 young stadium of L. reticulatus, Reinh. 1834 — 35, a conclusion which 

 also other authors have considered reasonable. Notwithstanding it 

 having been stated that L. perspicillum on several occasions had been 

 rediscovered in young specimens, the uninterrupted series between these 

 and the mature species has not been obtained as yet, and the species 

 must thus be regarded as being problematical. 



2. L. rossi was described in 1864, by Malmgren, from two very 

 young specimens, the larger of them, of a total length of 32 mm., having 

 been obtained by the first Swedish Polar Expedition in 1861, at 

 Treurenberg Bay (on the north side of Spitsbergen). Of these, but 

 one still exists, and is preserved in the Riks Museum at Stockholm. 



Through the kindness of Professor Smitt I have had an opportunity 

 of making a direct comparison between tlie type specimen of L. rossi 



' Den Danske Ingolf-Expedition. Vol. 2 (Det Ichlhyologiske UdbyUe) p 21 (Kbhvn. 



1898). 

 3 Forh. Vid. Selsk. Chria. 1878, No. 14, p. bi (Chria. 1S78). 



