55 355 



Pilumnus longicornis Hilgendoif. 



Pilumnus longicornis Alcock, LXVll, 193, 1898. 



Koh Kram, 30 fath.; III. 2 and 21; 1 ? juv. Koh Kahdat, 5-8 fath., sandy 

 mud, II. 16 and III. 4; 1 ? ovig. Gulf at Rayong, 7—10 fath., sand, mud, shells; 

 II. 8; 1 ?. Between Koh Mesan and Koh Chuen, 15 fath., stones; II. 6; 1 juv. 

 Between Koh Mesan and Cap Liant, 5—8 fath., sand, stones; II. 7; 1 juv. 



These specimens differ from the type in having the greater pari of (he outer 

 surface of the large hand , granulous and hairy ; this may be due to the smaller 

 size of the specimens. 



Pilumnus andersoni de Man. 



Pilumnus andersoni Alcock, LXVII, 194, 1898. 



15 miles east of Koh Chuen, 10 fath., shell bottom; II. 2; 1 Ç. Koh Chuen, 

 30 fath., shell bottom; I. 2; 2? 2 juv. Koh Chuen, 30 fath., shell bottom; II ; 1 c? 

 5? (1 ovig.). Koh Kram, 30 fath.; III. 2 and 21; 6 J* 7$ (2 ovig.) 12 juv. Koh 

 Kahdat, 1 fath., coral, coral blocks; I— II; 2 c? 1 ? ovig. Koh Chang, 1 fath., coral; 

 I— III; 2^* 7? (1 ovig.) 12 juv. 



The specimens are all small, the largest measuring 4 mm. long, 6 wide. The 

 outer angle of the orbit is inclined to be spiniform, but the spine is very short, 

 not approaching in size the other spines. 



Pilumnus edamensis de Man. 



Pilumnus edamensis de Man, Arch. f. Naturg., LIU, 1, p. 302, pi. XI, fig. 5, 1887. 



Koh Kalidat, 1 fath., coral and coral blocks; I— II; 1 c?- Koh Chang, 1 fath., 

 coral; I— III; 3 Ç. Bay at south end of Koh Chang, among large oysters; III. 14; 1 c?- 



Pilumnus cærulescens A. Milne Edwards, var. 



Plate I, fig. 15. 

 Pilumnus cærulescens Alcock, LXVII, 19(i, 1898. 



Koh Kahdat, 1 fath., sandy bottom, sponges, dead coral; I. 11; 1 c? 2$ (1 ovig.). 

 Koh Kahdat, among algæ; II. 19; 1 d* juv. 1 Ç. 



Corresponds well to Alcock's description except that the hands are not closely 

 granulate. 



Pilumnus hirsutus Stimpson. 



Pilumnus hirsutus Stimpson, Smithson. Misc. Coll., XLIX, ()9, pl. IX, fig. 1, 1907. Cf. Rathbun, Bull. Mus. 

 Comp. Zool., XXXIX, 129, 19(12 

 Koh Kahdat, 1 fath., sandy bottom, sponges, dead corals; I. 11; 1 Ç 3 juv. 

 Between Koh Mesan and Koh Chuen, 25 fath., shells, II. 5; 1 juv. Koh Kam, 5 fath., 

 gravel; II. 6; 3 c? 3? (1 ovig.). Between Koh Rial and Koh Mesan, 3— 5 fath., algæ; 

 II. 7; 1?. Between Koh Mesan and Cap Liant, 5—8 fath., sand, stones; II. 7; 2c? 

 1?. Koh Krara, 30 fath.; III. 2 and 21; 2 <^. Twelve miles east of Koh Mak, 

 20 fath., large seine; I. 28; 1«?. 



