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VIII. Three Species of Harpactid Gopepoda. 

 By Canon A. M. Norman, M.A., D.C.L., LL.D., F.E.S., F.L.S. 



(Plates 28-30.) 



Read 16th February, 1911. 



I HE following three species of Crustacea were found in 1888, in the Firth of Clyde, 

 when I was with Sir John Murray in his yacht. The Laophonte was dredged in 

 Lamlash Bay. Ancorabolus and Arthropsyllus were found under somewhat peculiar 

 circumstances. It was blowing hard, and we ran for shelter under the north-east 

 corner of the island of Little Cumbrae. The dredge was let down in about 20 fathoms, 

 and came up full of broken and decaying seaweed, among which nothing could be seen. 

 However, I worked a portion through sieves, but there was scarcely any product. 

 Nevertheless, among the very few things were found the two species just mentioned 

 and Campylaspis costata, G. O. Sars— all three additions to the British fauna. 



The Ancorabolus surpasses all known Crustacea in its wonderful ornamental sculpture, 

 with the exception of Pontostratiotes abyssicola, G. S. Brady, procured by the 'Challenger' 

 Expedition at the great depth of 2200 fathoms in lat. 37° 29' S., long. 27° 31' W. When 

 Ancorabolus was found it was almost smothered by fragments of filamentous algae which 

 clung to it. 



The drawings here published were kindly made for me by Mr. Andrew Scott in 1890, 

 but the pressure of various work has compelled me to defer publication. 







IBR 



Genus Laophonte, Philippi. 



Laophonte btjlbifera, sp. n. (PL 28. figs. 1-7.) 



Animal with head rather broad, thence tapering gradually backwards to the caudal 

 rami. Head as broad as long ; rostrum well produced, obtuse, terminating in two minute 

 cilia. 2nd and 3rd segments of urosome produced outwards and backwards, terminating 

 in a minute spine. "Whole animal densely pubescent. 



Caudal rami remarkable on account of their bulbous form ; they are as broad as long 

 and scarcely equal in length to the preceding segment. Principal seta long, equal to 

 the whole length of the animal ; exterior to this is a second long seta, which, together 

 with four small setae, terminate the ramus. 



Anterior antennae 6-jointed and slender for the genus ; their basal joint short, with 

 two small projections on the outer margin ; 2nd joint twice as long ; 3rd rather shorter 

 than the 2nd ; 4th and 5th very short, last joint equal to the two preceding. 



Posterior antennce unusually slender for the genus ; outer ramus well developed and 

 slender ; inner ramus slender, terminating in four setae. 



SECOND SERIES. — ZOOLOGY, VOL. XI. 



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