18/8.] PROF. A. H. GARROD ON THE ANATOMY OF PLOTUS. 679 



mydophorus and Dasypus than between Chlamydophorus and Ta- 

 tusia. 



I am indebted to Dr. Young for the preparation of the accom- 

 panying illustrations. 



EXPLANATION OF PLATE XLIII. 



Fig. 1. Male generative and urinary organs of Chlamydophorus truncatus, seen 

 from the front. From above downwards are seen the suprarenal' cap- 

 sules, the kidneys and ureters, the testicles, the bladder and urethra and 

 the penis. The penis is hooked back to show the retractor muscles on 

 its dorsal aspect. 



2. Male organs of Chlamydophorus truncatus, perineal view From 

 above downwards are seen :— the penis, its basal portion being covered 

 by the nbres of the bulbo-cavernosi muscles ; below this the Cowperian 

 glands lying in the interspace between the crura penis, these last being 

 covered by the fibres of the ischio-cavernosi muscles. 



3. Male organs of Chlamydophorus dissected, and seen from behind K 

 kidney and suprarenal capsule; T, testicle; P, prostate gland; c' 

 Cowper s gland ; Pe, penis; Cp, crus penis. 



4. Penis of Dasypus sexcinctus, showing the file-like structure on the lower 

 aspect of its extremity. 



5. Penis of Dasypus sexcinctus retracted within the prepuce. 



4. Note on Points in the Anatomy of Levaillant's Darter 

 {Plotus levaillanti). By A. H. Garrod, M.A., RR.S. 



[Eeceired June 14, 1878.] 



In a former communication ' I had the opportunity of bringing 

 before the Society several facts with reference to the anatomy of 

 Flotus anhinga, and of confirming Mr. Macgillivray's account o'f its 

 most peculiar proventriculus. Several specimens of the species have 

 since passed through my hands which differ in no way from that first 

 described. 



On the 9th of March last the Society obtained for the first time 

 by purchase, a male specimen of Levaillant's Darter (Plotus levail- 

 lanti) from Senegal. It unfortunately died on the 7th of this 

 month (May) from peritonitis, the result of a perforating ulcer in 

 the stomach. ° 



The severity of the peritonitis caused all the abdominal viscera 

 to be agglutinated into a single mass, and rendered them particularly 

 soft Nevertheless I was able to disentangle most of the alimentary 

 canal for examination, and it has proved of more than ordinary in- 

 terest, as the following description will serve to show. 



The tongue, as a free organ, is obsolete. The oesophagus is capa- 

 cious, without any crop. The oesophageal epithelium ceases abruptly 

 by a transverse line where the gastric portion of the canal com- 

 mences, below which it is replaced by the tough yellow epithelium 

 so characteristic of the situation. 



The proventriculus is composed of two circular areas of deep 

 glands, which latter are of considerable size and do not come into con- 



1 P.Z.S. 1S7C. p. 335. 



