394 Dr. Henry Woodward — Coal-Measure Crusfacians 



the two legs which represent the next succeeding segments the anterior 

 has a smaller hranchial lamella on its basal joint and only a rudimentary 

 exopodite, while the posterior pair have neither any branchial lamella 

 nor exopodite developed, but only the walking-leg or endopodite. 



The five succeeding (abdominal) segments each bear a pair of setose 

 many-jointed pleopods, and the margins of the segments have their 

 epimera more developed ; the sixth segment is tapering, cylindrical in 

 form, and bears upon its median dorsal line a short rounded telson, or 

 seventh terminal joint, fringed with minute spines, and two lateral, 

 much longer oval uropods fringed with hairs forming the tail-fan, the 

 outer exopodite of which has a transverse suture crossing it nearly 

 midway. 



2. Koo7iunga cursor, 0. A. Sayce, 1907.^ — The second living 

 analogue of the Coal-measure Schizopods under consideration was 

 discovered by Mr. J. A. Leach, M.Sc, in some small freshwater 

 reedy pools beside a tiuy runnel which joins the Mullum MuUum 

 Creek, Ringwood, near Melboui-ne, Australia. (The name Koonunga 

 is derived from the aboriginal name of a creek which runs near where 

 the specimens were collected.) 



Koonunga resembles Anmpides in general appearance. Cephalon 

 about equal to the following two segments combined, possessing 

 a short transverse sulcus on each side at about the middle distance, 

 posterioi'ly to which the margins are produced downwards and 

 inwards. Frontal margin of cephalon scarcely produced, incised 

 above the attachment of the second antennae, forming a small lateral 

 lobe. Eyes sessile, small, round, situated on the dorsal surface near 

 the frontal margin and close to the base of the antennules. 



Antennules with three stout basal joints to the flabella, of which 

 latter the upper branch is the longer. The antennae, with a single 

 flabellum borne on three basal joints, are more slender than the 

 antennules, and somewhat shorter (thej- are not furnished with 

 a scale). Mandibles with a single, dentate, broad, cutting plate and 

 molar expansion. Eight (?) " segments to thorax, the anterior segment 

 fused to the head, leaving seven distinct subequal free segments. 

 Maxillipeds without gnathobasic lobes, endopodite similar to but longer 

 and larger than in Anaspides. The thoracic legs which follow carry 

 branchiae and swimming branches or exopodite, like Anaspides. The 

 pleopods are unii'amous, except the first two pairs in the male. 



The abdomen is of equal length to the thorax, the last segment 

 not longer than the preceding. Anterior portion of body subcylindric 

 in form, becoming gradually rather broader and deeper and cylindrical 

 posteriorly. All the segments of the thorax and abdomen subequal. 



Telson entire, slightly broader than long, of triangular form and 

 rounded distally, fringed with spines. TJropoda with peduncle extending 

 to half the length of the telson, its endopodite and exopodite somewhat 



' See " Description of a new remarkable Crustacean with Primitive Malacostracan 

 Characters," by 0. A. Sayce, in the "Victorian Naturalist," Melbourne, vol. xxiv, 

 No. 7 (Nov. 7th, 1907), pp. 117-20; and Ann. and Mag. Nat. Hist. (London), 

 ser. viii, vol. i (April, 1908), pp. 350-5. [No figure of Koonunga has as yet been 

 published.] 



^ This is, of course, a matter of interpretation. 



