1910.] Solenodon paradoxus: Fore-arm diid Manns. 249 



five presacral vertebrse appear disc-like, a])parently osseous "intercentra." 

 In the other vertebrse these appear to be represented by the interarticiilar 

 discs. The ?iimhar.<t, as in other fossorial mammals, lack forwardly directed 

 parapophyses. 



The scapula in the }oinig sj)ccimcu is relatively much narroA\cr than in 

 the adult, a primitive Insectivore character. In the adult it is much broader 

 than in Erinaceus, with the postero-superior angle produced. The coracoid 

 is a good sized, inwardly curved process apparently continuous with the 

 glenoid epiphysis. The acromion, as in so many primitive types, is bifid, 

 the anterior fork being tipped by a separate epiphysis. The spine of the 

 scapula is quite deep, another primitive character. The posterior border 

 of the scapula in the adult is reflected outward and this makes it easy to 

 understand how, by a further development of this tendency, the subscaj)u- 

 laris muscle might gain partial attachment on the external side of the scapula 

 {cf. Edentata). 



The humerus is of primitive fossorial tyi)e (Fig. 27, no. 15, p. 437), broad 

 distally, with very stout entocondyle and an entepicondylar foramen ; the 

 supinator crest extends half way up on the back of the shaft, the capitellum 

 is globular, and the internal trochlea is occupied in the front portion by the 

 radius (p. 433). There is no supratrochlear foramen (contrast Erinaceus). 

 The large deltoid crest is of the flattened type, forming a long narrow tri- 

 angle, as in Edentates and Sorex. The bicipital groove is pronounced; the 

 head is a narrow oval, with the long axis at right angles to the i)lane of the 

 distal end of the humerus. 



The heavy radius and ulna are strongly curved longitudinally, as in 

 Ictops and Erinaceus, but the shafts (in the adult) are much compressed, as 

 in Edentates. The radius is very broad distally. The long curved olecranon 

 is transversely expanded at the proximal end, as in many other semi- 

 fossorial animals. 



Manns. The proximal row of car pals (Fig. 19, A^) are flattened. The 

 radial sesamoid ("|)repollex") is present, as in other Zalambdodonts and 

 Rodents. The scaphoid is prolonged posteriorly, broadly overlaps the large 

 trapezoid, and touches the proximal end of metacarpal I. The centrale is 

 large and flattened and lies wholly between the flattened trapezium and the 

 scaphoid. The lunar is much wider than high and rests upon both magnum 

 and unciform; in the back view the lunar-unciform connection is broader 

 (Fig. 19, A-). This lunar-unciform contact, which is very probably a 

 primitive character for many higher orders (p. 452), may in some cases have 

 been broadened by the increase in size of the distal end of the radius and the 

 reduction of the idna; for in Microgale where the ulna is relatively larger, 

 the lunar barely touches the unciform. The cuneiform is narrow (contrast 



