72 PROCEEDINGS OF THE ACADEMY OF [1894. 



nor is the New Zealand species described by Quoy ct Gaimard the 

 same as that of de Bkiinville. 



Ischnochiton fruticosus Gld. 



Abundant at Port Jackson, with the next species. This form is 

 distinguished from /. diveniena by its very much smaller girdle 

 scales. In fruticmm^ the individual scales measure in width -25 

 mm., or four to a millimeter. lu divergois they measure '40, or 

 otily two and a half to the millimeter. The difference is perfectly 

 ol)vious to the naked eye. 



This species and the ne.xt seem to have been included by Angas 

 under the name Lepldopleurus proteus. I believe CalUdovliiton 

 Copplngeri Smith to be the young of this species. 



Ischnochiton divergens Keeve. 



Port Jackson and Port Hacking (Cox). Reeve's Cli. proteus, 

 described from Newcastle, is a synonym. 



Ischnochiton (Ischnoradsia) australis Sowb. 



Port Jackson (Cox). 



Ischnochiton (Haploplax) smaragdinus Angas. 



Port Jackson (Cox). This species varies wonderfully in colora- 

 tion. The following patterns being repi-esented in the lot before me: 

 (r/) white or pale olive, the front and hind valves black; sometimes 

 the fourth, fifth and seventh valves marked boldly with black. (6) 

 Pale olive, flecked closely with olive, head and tail valves black. 

 (c) Sky-blue, closely reticulated with olive, and in places marked 

 with white, {d) Rich brown, speckled with olivaceous, and marked 

 with white on valves i, iv, viii. The details are thus endlessly 

 varied. Mr. E. A. Smith has kindly verified my determination by 

 a comparison with Angas type of smaragdiniis. 



I. smaragdinus picturatus var. iiov. 



Color-scheme consisting of a ivlde dui-aul dripe of lilac, dark blue, 

 ochre or some combination of these or other hues; tlie stripe bordered 

 with brownish, this border spreading forw.ird on value i, and spread- 

 ing over most of valves ii and vi. Remainder of the side- slopes light 

 and variegated. Girdle irregularly tessellated. 



This seems so well defined a pattern of coloring that I venture to 

 give it a name. Many Sjjecimeus are before me from Port Jackson. 



