290 COLLBCTIONB PBOM MDIANESIA. 



Two females were obtained at Albany Island, 3-4 fms., wbence 

 also it is recorded by Mr. HasweU, and a small male at "Warrior 

 Eeef (first coUection) ; also an adult male from Prince of Wales 

 Channel, 7-9 fms., and three from Thursday Island, 4-6 fms. (No. 165), 

 from the second coUection. 



Specimens are in the British-Museum collection from Ceylon 

 (-B. W. H. Holdsworih), and I have also seen examples from Singa^ 

 pore (in the collection of A. 0. Walker, Esq.). 



The remarkable development of the rostrum and orbital spines 

 and the form of the antennal scale serve to distinguish this species. 



According to Mr. Hasweil (Cat. p. 189), whose description of 

 this and several other of his new species was based on specimens 

 obtained by H.M.S. ' Alert,' it is invariably found clinging to the 

 arms of a species of Comatulid, to which its markings give it a 

 general resemblance. The carapace is marked with longitudinal 

 stripes of brownish purple, with a narrow median white line, which 

 is continued on the first two postabdominal segments ; at the sides 

 are three short white markings, the abdomen has broad brownish- 

 purple and narrow white lines, bases of antennae purple, longitudinal 

 stripes of purple on the ambulatory legs ; large hand marked with 

 longitudinal lines of light brown, bordered by narrow darker 

 bands. 



10. Alphens viUosus, M.-Edw. 



An adult example is in the coHeetion from Warrior Eeef (first 

 coUection), and two specimens (one of smaU size) from Thursday 

 Island, 3-4 fms. (No. 177), in the second coUection. 



A female with ova from the Australian coast (without special 

 indication of locality) is in the Museum from the coUection of Dr. 

 J. S. Bowerbank. 



To the characters given by MUne-Edwards I may add that there 

 exists a smaU spinule on the outer margin of the first exposed joint 

 of the antennulary peduncles. The larger chela is vertically very- 

 deep at its base, but narrows towards the fingers ; the smaUer one 

 is pubescent, but without sulci or spinules ; the fingers quite as 

 long as the palm. 



' 11. Pontonia (Conchodytes) tridacnse, Peters. 



A large series of specimens was obtained at Warrior Eeef, at 

 from 10-16 fms. (No. 137), together with specimens of Pinnotheres 

 vUlosulus, which inhabited "pearl-shells;" whether the Pontonia 

 tridaence had the same habitat is stated to be uncertain. By far the 

 greater number of the specimens ooUected were females with ova. 

 In the full-sized examples the second pair of legs are very much 

 larger and more robust than in the specimen figured by Dana (the 

 only one he had seen), having the palm robust and elongated, 

 rounded above and below, and the fingers less than half the length 

 of the palm, the mobile finger strongly carinated above, with a tooth 



