250 REPORT ON ZOOLOGY, MDCCCXLIV. 



OTOLICNTIS. Tarsus elongatus ; cauda longissima ; auriculae nudse magnse. 

 1. 0. Galaf/o. 2. 0. Alleni. 3. 0. Crassicaudatus. 4. 0. madagascariensis 

 (Microcebus, Geoffr.) 



B. Deutes incisivi f, cauiui j, molarcs f. 



LlCHANOTTJS. 



(//) Cauda brevissima. 1. Liclionotits Indri. 



(li) Caudata elongata. 2. L. Acahi (Ilabrocebm lanatus.} 



PE.OPITHECUS. 1. P. Diadema. 



II. Ungues digit! 2 et 3 podariomm incurvi subulati. 



TARSIUS spectrum. 



Tab. 1 contains figures of skulls of Chirogaleus griseus, 

 Lemur albifrons, Perodicticus Potto, Stenops gracilis, Licha- 

 notus Indri and Avahi, Tarsius spectrum. At tab. 2 is the 

 figure of Perodicticus Potto, and on tab. 3 that of Licha- 

 notus 



The internal structure of the Loris has been illustrated by a comprehen- 



sive investigation of Vrolik. The results have been inserted in the ' Nieuwe 



Verhaudeliugeu der erste Klasse van het K. Nederl. Instituut. van Weten- 



schappeute Amsterdam/ x. (1843) p. 75. Vrolik' s researches were first of 



all directed to the Stenops tardigradus in a fresh state ; but besides this he 



examined the St. gracllis and, as he mentions, the St. Javanicus. lu all lie 



found a great accordance in internal structure, being thus in opposition to 



Schroder van der Kolk, who has announced important differences as occur- 



ring in the last-named species, but which Vrolik attributes to the young con- 



dition of his specimen, and its having lain a long time in spirits of wine. 



The hemispheres of the cerebrum cover only the anterior part of the cere- 



bellum ; the grooves upon it are not numerous, and the convolutions exhibit 



great symmetry. The tubcrcula quadrigemina did not consist, as asserted 



by Kolk, of one, but of two pairs. The most remarkable feature on the 



tongue is a demi-cartilaginous and sub-membranous disc which is placed 



upon the under surface, not far from the apex of that organ, and is termi- 



nated by fine dentils or points ; Vrolik found this disc in all three species. 



The right lung has four, the left two lobes. Our author describes in detail 



the well-known vascular plexuses that occur in the extremities, and are not 



simply formed by the arteries, but also by the veins. The constrictions of 



the intestinal canal, as also the occurrence of a special vermiform csecal 



appendage, described by Schroder, from St. Javanicus, are disputed to exist by 



Vrolik in all three species. The small intestines he found to be throughout 



of nearly equal width, excepting that they expanded somewhat in order to 



prolong themselves into the large intestine ; the ciccum coli terminates in an 



