THE ANNALS 



AND 



MAGAZINE OF NATURAL HISTORY. 



[SECOND SERIES.] 

 No. 95. NOVEMBER 1855. 



XXVII. — Notes on some new or little-known Marine Animals. 

 By Philip Henry Gosse, A.L.S. 



[With a Plate.] 



(Fascis III.) 



Class ARACHNIDA. 



Order Acarina. Fam. TROMBiDiADiE, 



Genus Pachygnathus (Duges). 



P. notops (mihi). PI. VIII. figs. 1-4. 



Body flat, siuuated, pointed behind, black ; one eye on the 

 back ; legs equal, the first and second remote from the third and 

 fourth, hairy ; the last joint the longest. 



Description. — Length -gjih. of an inch. Body lozenge-shaped 

 or somewhat 7-sided, with sinuations at the origin of the limbs ; 

 it is hyaline and colourless at the margins, but the interior is 

 almost filled with a flesh of deep blue-black hue, perfectly opaque, 

 and of defined, subregularly-sinuous outline. In the centre of 

 the back, just behind the head, is a bright ruby-like round eye, 

 placed in front of the opacity, and between the first legs (fig. 1). 



The head, formed by a great lip, projects in front and cai-ries 

 two small palpi, thick at the base, conical, and pointed. Below, 

 the lip is divided longitudinally (fig. 2), each half being slightly 

 incurved and pointed, the two divisions approaching in a pincer- 

 like manner. Under slight pressure, there were projected be- 

 tween the palpi two slender styles (fig. 3), which doubtless 



Am. &^ Mag. N. Hist. Ser. "l. Vol. xvi. 21 



