1905.] DR. A. DUGES ON A NEW MEXICAN SNAKE, 517 



from Ishigaki and one from Iriomote. The scales behind the neck 

 were 24 in one specimen, round mid-bod}^ 29 in one specimen and 

 33 in the others. The ventrals were 336, 316, and 332. 



3. DiSTiRA ORNATA. — The three specimens were all from 

 Okinawa. The scales behind the neck were 29, 32, and 33 ; mid- 

 body 35, 37, and 38. Yentrals 271, 268, and 251. 



4. AiPYSURUS ANNULATUS. — All the six examples were from 

 Okinawa. Four had a sharp spine on the rostral which was absent 

 on the other two. The pr^ef rentals were very irregulai-. There were 

 four in three specimens, two in one specimen, and three (2 right, 

 1 left) in two specimens. In all one or both paiietals were split 

 by a suture behind. The scales were 17 in mid- body when the 

 vertebral row was enlarged, which was usually the case, though often 

 to a variable degree. In two specimens the scales were 19, the 

 vertebrals being divided into three rows subequal to the other 

 dorsals. Yentrals numbered 138 to 143. 



5. Platurus laticaudatus. — The tw^o specimens were from 

 Okinawa. The ventrals were 243 in one specimen ; the last was 

 divided in both specimens. 



6. Platurus schistorhvnchus. — Of 37 specimens, 29 were from 

 Miyako, 6 from Okinawa, and 2 from Amami. 



All the specimens were preserved in formalin. 



3. Description d'un Ophidien nouveau du Mexique (^Morenoa 

 orizahensis^ g. et sp. nn.). Par Alfked Duges, M.D., 

 C.M.Z.S. 



[Received July 7, 1905.] 

 (Text-figure 77.) 



Ce Oolubride (Sous-fam. Coluhrince) ne m'est connu que par 

 deux exemplaires pi-ovenant d'Orizaba (Etat de Yera-Cruz) d'ou 

 me I'a envoye le Prof. Aniceto Moreno pour le determiner. Ne 

 le trouvant decrit dans aucun des ouvrages que j'ai pu consulter, 

 j'ai du lui donner un nom generique et specifique nouveau et je 

 le dedie a mon ami M. Moreno. 



Ses rapports les plus in times sont avec le g. Ablabes, tel que 

 I'a compris Boulenger (Oatal. Snakes of Brit. Mus. 1894) ; mais 

 il en differe assez pour Ten separer, comme le prouve sa description. 



Les vertebres doi'sales posterieures manquent d'hypapophyses. 

 La dentition est isodonte : il m'a semble qu'il y avait une douzaine 

 de dents au maxillaire superieur, mais je n'ai pu m'en assurer 

 exactement pour ne pas trop mutiler I'exemplaire que je pouvais 

 examiner. L'aspect general est celui d'une Coronella. 



Caracteres. — La rostrale se replie un peu sur le museau. Les 

 intei-nasales sont un peu plus petites que les prefrontals; celles-ci 



