88 A RE-EXAMINATION OF AUSTRALIAN PYCNOGONIDA, 



1908, Amviotliea assimilis, Loman, 1908, p. 59. 

 1913, Achelia assimilis, Bouvier, 1913, p. 140. 



Specimens. — Australian Museum Collection, G5220, 

 one microscope slide labelled "type." This contains three 

 specimens, all immature, one of doubtful sex, the othei-s 

 female. Zoological Collection, Sydney University, one 

 microscope slide containing two specimens (adult), both 

 males. 



As Lo'man has pointed out, Haswell's description of 

 thisi species, published in the early days of Pycnogonid re- 

 search, is not critical enough for present day purposes. I 

 have, therefore, decided to give a full account of the 

 species. 



The slide in the Australian Museum marked "type" 

 contains only immature specimens with chelate chelo'r)hores 

 and immature ovigers. I cannot suppose that it was upon 

 these specimens that Haswell's original description was 

 based. The specimens from the University of Sydney were 

 certainly the originals of Haswell's drawings, and no doubt 

 it is an oversight that these were not designated as the 

 types. 



DescriiJtion. — The iody is disc like and broad, segmen- 

 tation practicalb- non-existant, crurigers closely approxi- 

 mated with no space between. 



Geplialon is very slightly developed. 



Ocular fuhercle is situated near anterior edge of cepha- 

 lon and is of medium length, rounded at apex, with e)'es 

 large, distinct, and pigmented. 



Abdomen is of medium length, semi-erect, tubular, 

 tapering and ornamented with a few spines towards ape^s. 



Ghelophorefi are imperfect in adult specimens. Scap© is 

 simple, chela rudimentarv. The whole organ measures 

 considerably less than half of the length of the proboscis. 



Fcdps are eight-jointed, second and fourth joints are 

 longest, remainder small. The last five joints are provided 

 with hairs. 



Ovigers (male) ten jointed. First joint small and 

 about as long as wide, the second, third, fourth, and fifth 

 are iDrogressively longer, the remainder are small, the tenth 

 being particularl}^ so. The last four joints beao* simple 

 spines aoid there is a terminal spine. The five terminal 

 joints are twisted into a spiral. 



Legs. — The three coxae are short, the second being a 

 little longer than the others. The first coxa bears terminally 

 a few simple spines each set upon a papilla. In the suc- 

 ceeding coixae a distal fringe is present consisting of many 



