26 SOLENODON PARADOXUS. 



anterior to the origin of the pectineus. Tlii,s muscle is thus closely similar to 

 that of Erinaceus, Centetes, and Myogale, having apparently much the same 

 proportions, origin, and attachment. In Potamogale and Gymnura it is very 

 much larger in relative size and extent of origin, and is remarkable in the latter 

 on account of its insertion upon the lesser trochanter together with the psoas 

 magnus. 



The gluteus maximus (Plate 6, fig. 1, c) arises as a thin muscular sheet by 

 tendinous fibers along the dorsal border of the ilium and the dorsal spines from 

 the fourth lumbar to the first caudal vertebra. A very distinct and separate 

 portion of this muscle (Plate 6, fig. 1, m) arises from the anterior tuberosity of the 

 ilium, just back of its dorso-lateral edge and passes postero-ventrally to join the 

 anterior edge of the main mass of the maximus about a centimeter dorsal to the 

 common tendinous insertion into the prominent crest below the great trochanter 

 and some 15 mm. from the head of the femur. This peculiar second head may 

 be an anomaly. Dobson does not mention it in his account of the muscles of 

 Solenodon cubanus. In Gymnura the gluteus maximus is described as having 

 a continuous origin "from the whole anterior margin of the ilium," a condition 

 from which that in Solenodon just described might readily be derived. 



The gluteus ynedius (Plate 6, fig. 1, b, n) arises as in Gymnura, Erinaceus, 

 and apparently Centetes, from two heads, here, however, with difficulty dis- 

 tinguishable, from the entire outer face of the anterior portion of the ilium as 

 far back as the level of the third sacral vertebra. The more anterior part is 

 thick and fleshy; it inserts by tendon on the antero-dorsal portion of the great 

 trochanter. The more posterior division inserts somewhat more distallyon the 

 posterior part of the great trochanter. The great sciatic nerve takes exit at the 

 hinder margin of the first pai't of this muscle and is slightly overlapped by 

 the second. 



The gluteus itunimus (Plate 6, fig. 1 , a) is small and flat, from an origin about 

 14 mm. in length on the ischium beginning just above the acetabulum. It is 

 inserted by tendinous fibers on the great trochanter, entero-posteriorly to the 

 two other glutei. This muscle agrees with that of Gymnura in its more posterior 

 origin; in Erinaceus it arises from the ilium. 



The rectus femoris (Plate 6, fig. 1, I) is from a short tendinous origin some 

 4 mm. long from the postero-ventral margin of the ilium just anterior to the 

 acetabulum. It is inserted on the antero-internal edge of the patella. 



The vastus externum (Plate 6, fig. 1, k) has a long origin from the great tro- 

 chanter and the trochantal ridge nearly to the distal end of the femur, and 



