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 The tunica vaginalis and testis of a Lamb affected with a con- 

 genital parenchymatous hydrocele 213 



The occiput of an Ichneumon, with dislocation of the atlas and 



subsequent ankylosis of that bone to the occiput 214 



The marsupium of a Short-headed Phalanger, Belidetis brevicejis, 

 opened in order to show a scu'rhous cancer growing from the 



mammary gland 216 



Ileo-cpecal intussusception in a Lemur 217 



Bal<e7iopterus unisetus 207 



EcMnoi'hynchus ruber 2-58 



Calamts Jinmarchicus 2C>2 



Generative organs of Eudrilus 303 



Generative organs oi Eudrilus, with bursa copulatrix laid open .... 305 



Varieties of Perionyx excavatus 3]0 



A small Fish of the genus Fierasfer imbedded in a Pearl-Oyster . . . . 819 



Trachea of Nothocrax urumutum, S 322 



Syrinx of Abdimia sphenorhyticha 323 



Syrinx of Xenorhynchus senegalensis 324 



A vertical section through the body of the axis to show the lenticular- 

 shaped piece of cartilage in Man 338 



A diagram of the axis vertebra to show the various nuclei in Man. . 339 

 A section through the hiunan sacrum, showing the epiphysial plates 

 uniting with each other peripherally before fusing with their 



centra 340 



Axis vertebra of a young Seal in section, showing the epiphysial 



plates of the true centrum of the axis 341 



Map of the vicinity of Tarapaca, Chili , . . , 390 



Bill of Phcenicopterus andinus 400 



Bill of Phcenicopterus jamesi 400 



Right columella of Ichthyosaurus 407 



Lower portion of right columella of Ichthyosaurus 407 



Lower portion of left columella of Ichthyosaurus intermedius 407 



Left columella of Hatteria punctata 407 



Muscles at the outer side of the elbow of the right winf of 



Caprimulgiis europcetcs 47I 



Muscles at the outer side of the elbow of the left wing of Steatornis . 471 



Anconal aspect of the left humerus of Tachycineta thalassina 502 



Palmar aspect of the left humerus of Tachycineta thalassina 502 



Anconal aspect of the left humerus of Micropus melanoleucus 602 



Palmar aspect of the left humerus of Micropus inelaiioleiictis 602 



Anconal aspect of the left humerus of Trochilus alexandri 602 



Palmar aspect of the left humerus of Trochilus alexandri 502 



