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size to, but different in character from those over the orbits is 

 recorded of no other known species, and may be accepted, I 

 think, as a reliable diagnostic character. From their large 

 size and projecting character, it may be anticipated that these 

 nostril tentacula fulfil the part of efficient tactile organs, or 

 taking their origin from the olfactory chamber may be closely 

 associated with the sense of smell. In the numerous European 

 species of the allied genus, Blennius, with which I am familiar, I 

 have always found the form and proportions of the tentacular 

 appendages to be a constant factor, and in my examination of a 

 number of examples of the indigenous Glinus despicillatus for 

 the purposes of comparison, I have found no variation in these 

 elements. It may be mentioned here that although nostril 

 tentacula are not included in the diagnosis given of the last- 

 named species, they exist in a rudimentary condition, and may 

 be observed in life as a minute bi- or tri-furcate filament 

 developed from the projecting tube of the nostril. In spirit- 

 preserved examples it shrinks up so as to be scarcely visible. 

 An additional point of divergence with relation to Glinus 

 despicillatus that has been established through the examination 

 of a considerable number of this species, is the circumstance 

 that while in this type the number of soft or jointed rays to the 

 hinder extremity of the dorsal fin is invariably four only, in 

 both examples of the variety now introduced there are five 

 such rays. 



It appearing desirable that a new specific title should be 

 associated with the from described in this communication, I 

 propose, providing that further investigations should fail to 

 identify it with any previously named type, to distinguish it 

 by the title of Glinus Johnstoni. The scientific name sug- 

 gested, I need scarcely add, is in honour of a well-known 

 Fellow of the Society, Mr. E. M. Johnston, F.L.S., to whom 

 science is so much indebted for the already advanced state of 

 our knowledge concerning the fish fauna of this colony. 



The third species of fish which I exhibit on this occasion I 

 had anticipated, on account of the scaly covering of the several 

 vertical fins, to belong to the group distinguished by the title 

 of the Squammipiinnes or " scale-finned" fishes. Without 

 examining it closely I set it aside at the time as being, in all 

 probability, identical with Scorpis Georgianus, the single known 

 species of that group that has so far been captured, though 

 very rarely, in Tasmanian waters. On proceeding very recently 

 to glance through the structural details of the fish, it was 

 found, however, that it could not be referred to the genus 

 Scorpis or to any other of the typical Squammipinnes but to 

 the tribe of the Pomacentridse, many of whose members bear 

 an external resemblance to those of the first-named group, 

 but, at the same time differ from them m several important 



