GoYEX. — On a Keir Species of Migas. 123 



4. Post-oinosternum separated from coracoids 



while still in the state of indifferent tissue, 

 and chondrification retarded to a later pe- 

 riod than that of the ribs. Hypothetical. 



5. Sternum (post-omosternum) unites very early 



with the first pair of ribs, and chondrifica- 

 tion extends into it from them ; after chon- 

 drification it grows backwards, tlie remaining 

 sternal ribs uniting successively with it. 



Ciicmidophorus (? Aptery.r). 



6. Development of sternum further retarded until 



it first appears in the form of paired longi- 

 tudinal bars, formed by the concrescence of 

 the thoracic ribs. Maiinnalia. 



DESCIUPTION OF PLATE XIX. 

 Fig. 1. Shoultlei--girclle of Nottdanus tndiciis, viewed obliquely from the 



leftside; one-half natural size: Cor., coracoid ; sca2'-> scapula; 



pr. om. St., pre-omosternuni ; 2>i- om. st., post-ouiosternum. 

 Fig. 2. Mid-ventral portion of the same, from beneath ; natural size : 



Letters as before. 

 Fig. 3. Part of shoulder-girdle and sternum of a young frog (after W. K. 



Parker) : Pr. Cor., pro-coracoid ; cL, clavicle ; the other letters 



as before. 

 Fig. 4. Early stage in the development of the shoulder-girdle and sternum 



of a lizard (Cncniidophonis) (after Goctte) : Th. Eb. 1., first 



thoracic rib ; other letters as before. 

 Fig. 5. Early stage in the development of the sternum of man (after 



Ruge) : Letters as before. 

 Fig. G. Later stage of the same (after Ruge): ,r. 2"m xiphoid process; 



other letters as before. 



Art. XVII. — Dcscn'jition of a Netr Specie.^ of Migas, irith- 

 Notes on its Habits. 



By P. GoYEN, F.L.S. 



[Read before the Otago Institute, 13th May, 1890.] 

 Plate XX. 



Fam. TERRITELAEIiE. 



Gen. Migas, Koch. 

 Migas sandageri, sp. nov. 

 Femina : Length about 9mni. 



Cephalothorax and falces brown ; legs and palpi brownish- 

 yellow, with wide dark-brown flecks and annulations ; sternum , 

 labium, and maxillae yellow suffused with brown ; abdomen 

 dark-brown, darker above than below, and speckled with 



