Knott — On Muscular Anomalies. 629 



be separated with the greatest ease, not presenting any intimate 

 adhesion at all ; in two other cases the connexion was so slight that 

 the aponeurosis could be satisfactorily separated till the linea alba 

 was reached. 



Camper's intercolumnar lands {^fibrce collaterales of Winslow).-These 

 fibres present very varying degrees of development, and I have, in 

 emaciated subjects, sometimes found them so weak as to be able to 

 afford hardly any strength to the upper angle of the ring. Complete 

 absence has been observed by Professor Macalister : this I have not 

 seen, and believe that it must be a very rare condition, as I have 

 examined the ring with special care in more than two hundred sub- 

 jects without observing it. 



A variability of development somewhat proportionate to that of 

 Camper's bands I have found to exist in the case of Colles's triangular 

 ligament {Ugamentum inguinale internum of Bourgery, lig. Gimhernati 

 reflexum of Henle). 



Ohliquus externus abdominis minor {s. secundus). — One example of 

 this muscle I have met with (not in any of the cases specially 

 examined) ; arising from the ninth and tenth ribs at the junction of 

 bone and cartilage, it passed down to its insertion into Poupart's liga- 

 ment, about the junction of the middle and outer thirds. Its breadth 

 at the upper end was about two and a-half inches ; at the lower 

 extremity about an inch only. About two inches of the latter were 

 aponeurotic. 



Rectus lateralis abdominis (Xelch). — This muscle has been described 

 as arising from the tenth rib, about the middle of its lower border, and 

 passing down between the external and internal oblique muscles, to 

 its insertion into the crista ilii, also about the middle. I have twice 

 met with a muscular band, to which this name may be applied, but it 

 arose in each case from the eleventh rib, near its apex. The inser- 

 tion was that of the muscle described by Kelch. 



Obliquus abdominis internus. — This muscle I examined in the same 

 subjects as the last. In these, as in other cases, its origin from 

 Poupart's ligament varied considerably. In six instances it occupied 

 fully two-thirds of the length of the latter structure ; in twenty-two, 

 about half; in the remaining eight the attachment was somewhat less. 

 The costal attachments varied from two to five. In twenty-eight of 

 thirty-six muscles, the muscle was inserted into three ribs ; in three 

 cases into five ; in six into four; while in two examples the correspond- 

 ing number of ribs gave attachment. In two cases (not included 

 among the thirty-six already referred to) this muscle was so closely 

 connected with the transversalis that I could not satisfactorily separate 

 the adjacent surfaces. A tendinous inscription of about two and a-half 

 inches in length was observed in one case to be placed opposite the 

 apex of the tenth rib. This I have also noted in five other instances. 

 In two cases (not of the thirty-six) I found a similar, but shorter, in- 

 scription opposite the eleventh rib. An isolated cartilaginous slip 

 opposite the tenth costal cartilage I have met with twice, and similar 



