M{) 



Rev. H. Clark on a new species of Spider. 329 



catory orifice. The arrows define the position and the boundaries 

 of the breathing-chamber. 



^cr. 6. Planorbis corneus, Lamk., taken out of its shell, a, respiratory 

 ' ' siphon ; b, space embracing the mantle ; c, outline of pulmonary 

 chamber; d, d, abdominal segment of the body. 



Fig. 7' Plan of branchial chamber of Sepia officinalis, a, expiratory siphon ; 

 b. and arrows, inspiratory fissure ; c, bottom of the branchial 

 cavity ; d, plan of the hollow cones of the branchiae ; e, the open 

 hollow bases of the branchiae by which the water enters Jt^^i^|;e?», 

 rior of the organ. ^^ -^-^^-^ 



[To be continued.] i lawoq 



XXX. — Notice and Description of a New Species of Spider. By 

 the Rev. Hamlet Clark, M.A., Curate of All Saints, North- 

 ampton. ^ 



To the Editors of the Annals of Natural History. ' r^„^ 



Gentlemen, Northampton, Oct. 16, 1855. 



Mr. Blackwall has for many years selected your Magazine 

 as the medium for communicating to the public his many dis- 

 coveries in British arachnology; this is my reason for applying, 

 for admission into the same pages of an additional species which? 

 appears to be new to our lists. 



I am, Gentlemen, faithfully yours, 



Hamlet Clark. 



■"^^^."^^I"^^ Salticus BlackwalUi. ^--C--^™-'' •' -^^ 



Length 4 lines ; length of cephalothorax 1^ ; greatest breadth 

 1 ; length of posterior legs 2f ; of second pair 2|. 



Legs, especially the anterior pair, robust, setaceous ; on the 

 inferior surface of tibise and metatarsi of first and second pairs 

 two rows of sessile spines ; legs ochraceous, on the upper sur- 

 faces an irregular row of black spots j the fourth pair is longest ; ■ 

 the second pair slightly shorter than the third. Tarsi termi- 

 nated by two black curved claws. Palpi ochraceous. Cephalo- 

 thorax large, convex, somewhat quadrate, rovmded at the sides 

 and base, slightly pubescent ; the anterior part, where the eyes 

 are seated, black ; the sides and posterior part ochraceous, with 

 black spots and radiating irregular lines converging to the 

 centre ; lateral and posterior margins narrow and black ; frontal 

 margin clothed with longish yellow hairs. Falces short, vertical, 

 subconical, marked with a short black streak on the outer side. 

 Maxillce straight, short, enlarged and rounded at the extremity, ^ 

 marked with dark spots on the inner margin. Lip oval, base and 



