266 CLASS XV. 



HydropMs Daud., Enhydris Meer. Scales carinate witli 

 a tubercle in the middle, hexagonal. In the keel of abdomen a 

 row of larger scales bitm-berculate, sometimes irregular and di- 

 vided throughout. 



Sp. Hydrophis doliatus, Disteira doliata Lac. Ann. duMus. iv. PL 57, fig. 2 ; 

 ■ — HydA-oplds gracilis Schl., Hydrophis fasciatus Guerin, Tconogr., Rept. 

 PL 25, fig. I, KussELL Serp. i. PL 44, Cantor L L PL ^6.— Hydrophis 

 striates Schleg. Faun. Jap>on., Serp. PL 7, &c. ^ 



Acalyptus DuM. BiBE. Head scaly posteriorly, with occipital 

 scute none. Scales imbricate. 



Sp. Acalyptus superciliosus DuM., BiBR. ; from Pbron's Voyage, considered 

 by ScHLEGEL as a variety of Hydrophis pcdamidoides. 



Pelamys Daud. Abdomen and tail covered below with small 



hexagonal scales, tuberculate in the middle. Abdomen compressed 



l^elow, with acute margin between two rows of scales. 



Sp. Pelamys hicolor Daud., Hydrophis Pelamis Schleg., Russell Serp. i. 

 PL 41, Vosmaee Beschrijving van de bruinrug-platstaart-slang, 1774, Cuv. 

 R. Ani., ed. ill., Rept. PL 36 bis, fig. i ; in the Indian Sea and South 

 Pacific ; the most common species of this family. 



W Innocuous se^yents. 



A. With last tooth of wpi^er jaw larger than the rest, sulcated. 



Family VIII. Asmeophes s. Glyj^hodontes [OjnstJioglyptes 

 DuM. and BiBE.) Head scutate. Subcaudal scutes almost always 

 in pairs. 



Dipsas Laue. Head flat above, broader than trunk, triangular, 

 obtuse anteriorly. Eyes large. Body compressed. Tail acumi- 

 nate, long. Mostly a row of larger hexangular scales in the keel 

 of back. 



Sub-genera: Telescopus Wagl., Dum., Bibb., Ehinohothryum 

 Wagl., Dum., Bibe., Himantodes Dum., Bibr., Triglyphodon Dum., 

 BiBR. {Gephalophis FiTZ.), Anholodon Dum., Bibr., Heterurus Dum., 



BiBR. 



Sp. Dipsas Nattereri Schleg., {Dryophylax) , Coluber Nattereri Mikan., Max. 

 Pr. V. WiED, AH., Liefer, xiv. ; — Dipsas Cynodon Cuv., Opetiodon Cyno- 



^ Hydrophis palaniidoides Schleg. belongs to this genus, and not to Pelamys. 

 Here also is to be placed Hydrophis schizopholis Schmidt; Abhand. herausgegcben von 

 dem naturivissenscJi. Verein in Hamburg, i. 1846, Taf. xv. (afterwards raised into a new 

 genus by Fischer 1. 1. p. 37, under the name of Astrotia). 



