gio Bquamis obtecta esl pone rotundatis subtilissime vemiculosis ; ani orificiuni seinilunul.ue occunit, mar- 

 gine postico squamutis aumerosis, ;m-usiis cinctum; cauda brevis, compressissima, nuneo postico non 

 altior, sul)ito trigono-terminata, iu apice extimo squama magna, juxta cruam lateraliter utrinque ;ilia tri- 

 gona adest, terminata, sqnamifl obsoletc hcxa^onis, medio punctulo ^ibbo armatis obsita; margo caudae 

 superior ac inferior rectissimus, integerrimus est, non pellucidus. Scutella abdominalia 154. 



Color. Caput Qavum, macula Lata a scutorum frontalium posticorum margine postico usque ad 

 aucham extensa ac taenia supra oris angulum incipiens, infra oculos et arcuata ante nares supra rostrum 

 ducta nigricantes; scutum labiale ac scuta mentalia olivascenti-lavata; dorsum totum laete olivascenti- vi- 

 ride squamarum limbo subtili nigricante, ejus latera ac abdomen laete sulphureo-flava, exceptis scu- 

 tellorum abdominis serie schistaceo-atra ac fasciis ante caudam duabus penultimis Qavis rubro-lavatis: 

 cauda tota schistaceo-aterrima, unicolor; truncus ab occipite usque ad caudae basin cingitur annulis 44 

 angustiusculis schistaceo-atris per interstitia aequalia diremtis; in utroque margine integerrimi, subtus 

 vero abdominab' linea schistaceo-atra dissecta sunt; annuli utplurimum in dorso medio ac versus scutella 

 abdominalia paullo latiores sunt quam a<l latera; in spina dorsi adsunt inter fascias, in medio interstitii 

 oiivaceo-virescentis, maculae schistaceo-atrae, prima pone occiput conspicua; maculae hae utplurimum 

 rotundae sunt, mox majpres mox minores; raro \ersus truncum infimum in fasciolam ellipticam vergunt; 

 omnium minimae sunt in medio trunci; irides...? 



Proportio corporis partium e mensura. Longitudo a rostri apice usque ad caudae finem 

 17", caudae solius 1" 4 '//", capitis 7"'; ambitus otpitis immediate pone nares 10 /y/ , pone oculos 1", 

 occipitis 1", colli supremi 1 y/ , trunci in medio f" 5 y// , prope anum 1"; cauda ad basin alta est 3'/»'", 

 in inedio et ante apicem K". 



ffabitatio et yitae ratio. Indiam orientalem inhabitat. 



OBSERVATIONES. Specimen purissimae conservatiortis nunc descriptam , communicaium ab amico venerato 

 BoillejIUd , inspectore summo in rebns navalibns in Portu Gratiae, adest in mea amphibiornm collec- 

 iione. Hoc ex India orientali allalum Juisse dixit amicns. — Color rnber prope caudae basin mox palles- 

 cebat ; re/iquns hucnsque resiabat ; epidermide detrila fasciae schistaceo • nigrae aterrimae Jiunt. Shaivii 

 Hydrus spiralis (Gen. Zool. V. j. T. 2« p. 564« 125) nisi eadem. atiamen species perquam affinis similis- 

 que est. De Hy dr ophe rnel anuro sequentibus characteribus potissimum discedere videtur. In Hydro 

 spirali trunci color universalis Jlavus est ; truncus vero cingilur annulis intense castaneo -Jiiscis ; inter 

 quos quidem annulos adsuni maculae rolundae concolores , in trunco medio (?) incipientes , alternantes ; cau- 

 da lata nigra gerit prope basin Jlavas maculas ; margines ipsius quoque sunt subpellucidi. — Ad amplio- 

 rem vero comparationem Angli ipsa verba ponam: Tellowish Hydrus w ith brcMvn bands, lon- 

 gitudinally conflucnt bencath. Its length is about tuo Jeet , and ils habit slender: the body much 

 compressed throughout ; the back rising into a very sharp carina (in Hy dro phe melanuro non conspi- 

 cua); the abdomen being also carinaled, but having a flattened edge oj scales somewhat a ider ihan the rest, and 

 measuring about the Jifteenth oj an inch in diameter: the head is small, and covered with large scales : the 

 moude u ide ; tlie scales on the uchole animal moderalely small , ovate and s/ight/j* carinated : the ground 

 colour isj ellow , barred in a beauliful manner Jrom head to tail with deep chesnust -brown or blackish Jas- 

 ciae , each u idening on the abdomen , and thus Jorming a highlj^ dislinct and handsome pattern when vie- 

 u ed on each side seeming to constitute so 7tianj ' /arge, round, j~e//ow spots on a b/ackish ground: the back, 

 nl aboui tlie /nirld/e, is marked , a/ong its upper part , wilh a row oj rather /arge , round, b/ackish spots 

 situaled hetu een the Jasciae, and so p/aced as to bc in some parts on one side , and in others on the opposite 

 side oj the dorsa/ carina; whi/e some Jew are seated on the midd/e oj the ridge ilse/J: this variegation is 

 continued to llte tail , u hich is aboul an inch and three quarlers /ong , b/ack or deep brown, with a Jew 

 j~e/low patches towards ils biginning : it is remarkab/j- broad for the size qf the animal , and verj- thin 

 on theedges, so as to be semitransparent on those parts ; the carina on the back is so sharp as to surpass in 

 tliis respect everj- other species oj serpent. — In Hj~ drophe mel anuro dissectio mihi nuilum ostende- 

 bat exlremitatis posticae vestigium. 



