On the Genus Puerulus, Ortniann. 441 



Hab. Rhio Archipelago. (Type from Karitnon.) 



Ti/pe. Adult female. Original number 1366. Collected 



13fli August, 1908. 



Seventeen specimens examined from the islands of Kari- 



mon, Kundur, Batam, and Bintang. 



(9) Mus rattus rhiom's, subsp. n. 



A rat of the albescens type of the rattus group, but darker 

 than any known Malayan form. 



Hab. Bintang and Batam Islands, Rhio Archipelago. 

 (Type from Bintang.) 



Type. Adult male. Original number 739. Collected 

 8th June, 1908. 



A series of eighteen specimens, of both sexes and all ages, 

 from the two islands examined. The general appearance 

 throughout is verv uniform. 



(10) Sus andersonij sp. n. 



A pig of the S. vittaius group allied to S. rhionis, but with 

 conspicuously smaller teeth. 



Upper length of skull 310 mm. p^ 10 X 4*3 mm. ; ^^^ i 1 x 

 8-3; 7/10-3x12. 



Hab. Islands of the Rhio Arciiipelago. (Type from Balam 

 Island.) 



Ty2)e. Adult female. Original number 927. Collected 

 15th July, 1008. 



Four specimens examined. 



LVIII. — The Genus Puerulus, Ortmann, and the Post-larval 

 JJevtlopment of the Spiuij Lobsters (Palinuridai) . By 

 W. T. Calman, D.Sc. 



(Published by permission of the Trustees of the British Museum.) 



The genus Puer was established by Ortmann * in 1891 for 

 the reception ot Panidirus angulatus, Spence Bate, and a new 

 species from Japan described under the uKvatoi P. pellucid as. 

 The genus was distinguished from Senex { = Panulirus) by 

 having the antennular segment unarmed and the cephalo- 

 thorax with a pair of lateral ridges, giving it a prismatic 



* Zool. Jahrb. Syst. vi. pp. 15 & 37 (1891). 



