10, pActycaLamus.—11. AGAMODON. 471 
k, Hgr. (151414), Algiers. Mr. Kemp [P.]. 
1m. Ad. & hgr.(A.140+ — Algiers. 
12, 145+13). 
n-o, Ad. (A, 1386+-15, 141 Tamesmida, Al- M. F. Lataste [P.]. 
+13). geria. 
10. PACHYCALAMUS. 
Pachycalamus, Giinth. Proc. Zool. Soc. 1881, p. 461; Peters, Sitzd. 
Berl, Ac, xxvi. 1882, p. 583. 
Nostril inferior, between two small nasals, on the side of the 
large rostral; three large upper head-shields. A ventral line, no 
vertebral or lateral lines. Tail depressed, obtusely pointed. Pra- 
anal pores. 
Socotra. 
1. Pachycalamus brevis. 
Pachycalamus brevis, Giinth. 1. ¢. 
Premaxillary teeth 3; maxillaries 3—3; mandibulars 6—6. 
Head depressed, with truncate projecting snout. Rostral large, 
trapezoid, its posterior border largest, straight, in contact with 
a pair of large prefrontals; a large frontal, angular anteriorly, 
nearly as long as broad, with more or less distinct traces of median 
division ; eye slightly distinct through the ocular; a large pre- 
ocular; an infraocular; five upper labials, first very small, fourth 
and fifth largest. Mental narrow, elongate, a little broader ante- 
riorly ; chin-shields very small, median hexagonal; three lower 
labials, second largest. Body short, though less so than in Tro- 
gonophis. One hundred and sixty-five to one hundred and seventy- 
three annuli on the body, and nineteen or twenty on the tail; on 
the middle of the body an annulus contains forty-eight or fifty 
segments. A well-marked ventral line, but no vertebral or lateral. 
Anal segments six or eight. Four preanal pores. Brown above; 
head and lower surfaces yellowish white. 
millim 
Length to vent.............. 198 
Tall. eee ne ev ei aeenneeeeeen 15 
Diameter of body............ 9°5 
Socotra. 
a-f. Ad. & yg. Socotra. Prof. J. B. Balfour [C.]. 
(Types.) 
11. AGAMODON. 
Agamodon, Peters, Sitzb. Berl, Ac. xxvi. 1882, p. 580. 
Nostril inferior, pierced in a nasal which unites with the first 
labial; rostral large, followed by a single very large shield, A 
