436 W. N. F. WOODLAND 



L) 1 h r i u 111 t e r e b r a n s , Linton (1 893) ; M . li e x a c o t y 1 e , 

 Linton (1898) ; Glaridacris catostomi, Cooper (1920) ; 

 Archigetes appencliculatus, Eatzel (1868), and A. 

 brachyurus, Mrazek (1908). Setting aside for the present 

 the question as to whether the first eight of these ten species 

 are rightly to be referred to the three genera named, it is to be 

 remarked that all these ten forms are very similar in their 

 general organization. Apart from minor differences in connexion 

 with the genitalia, more marked differences in the muscular 

 development and shape of the ' head ', and the possession of 

 a ' caudal ' appendage by A r c h i g e t e s , all ten species agree in 

 general body-form, in bearing the sexual apertures in the last 

 quarter of the body-length and in therefore having the ovary 

 situated very near to the posterior end, and in the distance 

 between the median ' isthmus ' of the ovary and the genital 

 openings being at most (in C. tuba) one-ninth the length 

 of the body (the length of the body being measured from 

 the hind end of the ovary to the anterior extremity in 

 not unduly contracted specimens) and usually much less ; 

 also in the presence of a very small group of vitellaria situated 

 posterior to the ovary. 



The four new species of Caryophj'llaeidae described 

 in the present communication all differ from the ten species 

 above named in at least two of the features just stated,' and 

 in three of these new species in all of these features, and since 

 all four species represent marked departures from the type of 

 Caryophyllaeus which, in the form of C. laticeps 

 (PI. 24, fig. 10), has grown familiar to zoologists, they are of 

 more than usual interest. 



My material consisted of specimens, already stained and 

 mounted in balsam, contained in the collection of slides which 

 belonged to the late Dr. A. J. Chalmers when Director of the 

 Wellcome Tropical Eesearch Laboratories at Khartoum, and 

 kindly presented to the Wellcome Bureau by his successor. 

 Major E. G.. Archibald. The greater part of this material, 

 though sufficiently well preserved for all ordinary purposes, 

 is yet not good enough for minute histological observations, 



